1 /*=========================================================================
4 Module: $RCSfile: gdcmFile.cxx,v $
6 Date: $Date: 2006/06/20 16:11:17 $
7 Version: $Revision: 1.323 $
9 Copyright (c) CREATIS (Centre de Recherche et d'Applications en Traitement de
10 l'Image). All rights reserved. See Doc/License.txt or
11 http://www.creatis.insa-lyon.fr/Public/Gdcm/License.html for details.
13 This software is distributed WITHOUT ANY WARRANTY; without even
14 the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
15 PURPOSE. See the above copyright notices for more information.
17 =========================================================================*/
20 // -------------- Remember ! ----------------------------------
22 // Image Position (Patient) (0020,0032):
23 // If not found (ACR_NEMA) we try Image Position (0020,0030)
24 // If not found (ACR-NEMA), we consider Slice Location (0020,1041)
25 // or Location (0020,0050)
26 // as the Z coordinate,
27 // 0. for all the coordinates if nothing is found
29 // Image Position (Patient) (0020,0032) VM=3
31 // The attribute Patient Orientation (0020,0020) from the General Image Module
32 // is of type 2C and has the condition Required if image does not require
33 // Image Orientation (0020,0037) and Image Position (0020,0032).
34 // However, if the image does require the attributes
35 // - Image Orientation (Patient) (0020,0037), VM=6
36 // - Image Position (Patient) (0020,0032), VM=3
37 // then attribute Patient Orientation (0020,0020) should not be present
41 // Patient Position (0018,5100) values :
43 // HFS = Head First-Supine, where increasing (positive axis direction) :
44 // X -> to the direction pointed to by the patient's oustretched left arm
45 // Y -> to the anterior-to-posterior direction in the patient's body
46 // Z -> to the feet-to-head direction in the patient's body
48 // HFP = Head First-Prone, where increasing (positive axis direction) :
49 // X -> to the direction pointed to by the patient's oustretched left arm
50 // Y -> to the anterior-to-posterior direction in the patient's body
51 // Z -> to the feet-to-head direction in the patient's body
53 // FFS = Feet First-Supine, where increasing (positive axis direction) :
54 // X -> to the direction pointed to by the patient's oustretched left arm
55 // Y -> to the anterior-to-posterion direction in the patient's body
56 // Z -> to the feet-to-head direction in the patient's body
58 // FFP = Feet First-Prone, where increasing (positive axis direction) :
59 // X -> to the direction pointed to by the patient's oustretched left arm
60 // Y -> to the posterior-to-anterior direction in the patient's body
61 // Z -> to the feet-to-head direction in the patient's body
63 // HFDR = Head First-Decubitus Right
64 // HFDL = Head First-Decubitus Left
65 // FFDR = Feet First-Decubitus Right
66 // FFDL = Feet First-Decubitus Left
68 // we can also find (non standard!)
73 // CS 2 Patient Orientation (0020 0020)
74 // When the coordinates of the image
75 // are always present, this field is almost never used.
76 // Better we don't trust it too much ...
85 // (0020|0037) [Image Orientation (Patient)] [1\0\0\0\1\0 ]
88 // ---------------------------------------------------------------
91 #include "gdcmGlobal.h"
93 #include "gdcmDebug.h"
95 #include "gdcmSeqEntry.h"
96 #include "gdcmRLEFramesInfo.h"
97 #include "gdcmJPEGFragmentsInfo.h"
98 #include "gdcmDataEntry.h"
101 #include <stdio.h> //sscanf
102 #include <stdlib.h> // for atoi
107 //-----------------------------------------------------------------------------
108 // Constructor / Destructor
111 * \brief Constructor used when we want to generate dicom files from scratch
116 RLEInfo = new RLEFramesInfo;
117 JPEGInfo = new JPEGFragmentsInfo;
118 GrPixel = 0x7fe0; // to avoid further troubles
120 BasicOffsetTableItemValue = 0;
121 FourthDimensionLocation = TagKey(0,0);
126 * \brief Canonical destructor.
134 delete[] BasicOffsetTableItemValue;
137 //-----------------------------------------------------------------------------
141 * @return false if file cannot be open or no swap info was found,
142 * or no tag was found.
146 if ( ! this->Document::Load( ) )
149 return DoTheLoadingJob( );
153 * \brief Does the Loading Job (internal use only)
154 * @return false if file cannot be open or no swap info was found,
155 * or no tag was found.
157 bool File::DoTheLoadingJob( )
159 // for some ACR-NEMA images GrPixel, NumPixel is *not* 7fe0,0010
160 // We may encounter the 'RETired' (0x0028, 0x0200) tag
161 // (Image Location") . This entry contains the number of
162 // the group that contains the pixel data (hence the "Pixel Data"
163 // is found by indirection through the "Image Location").
164 // Inside the group pointed by "Image Location" the searched element
165 // is conventionally the element 0x0010 (when the norm is respected).
166 // When the "Image Location" is missing we default to group 0x7fe0.
167 // Note: this IS the right place for the code
170 const std::string &imgLocation = GetEntryString(0x0028, 0x0200);
171 if ( imgLocation == GDCM_UNFOUND )
178 GrPixel = (uint16_t) atoi( imgLocation.c_str() );
181 // sometimes Image Location value doesn't follow
182 // the supposed processor endianness.
183 // see gdcmData/cr172241.dcm
184 if ( GrPixel == 0xe07f )
189 if ( GrPixel != 0x7fe0 )
191 // This is a kludge for old dirty Philips imager.
199 // Now, we know GrPixel and NumPixel.
200 // Let's create a VirtualDictEntry to allow a further VR modification
201 // and force VR to match with BitsAllocated.
202 DocEntry *entry = GetDocEntry(GrPixel, NumPixel);
205 // Compute the RLE or JPEG info
207 const std::string &ts = GetTransferSyntax();
208 Fp->seekg( entry->GetOffset(), std::ios::beg );
209 if ( Global::GetTS()->IsRLELossless(ts) )
211 else if ( Global::GetTS()->IsJPEG(ts) )
212 ComputeJPEGFragmentInfo();
215 // Create a new DataEntry to change the DictEntry
216 // The changed DictEntry will have
217 // - a correct PixelVR OB or OW)
218 // - the name to "Pixel Data"
221 //==> Just change the VR !
224 DataEntry *oldEntry = dynamic_cast<DataEntry *>(entry);
228 // 8 bits allocated is a 'O Bytes' , as well as 24 (old ACR-NEMA RGB)
229 // more than 8 (i.e 12, 16) is a 'O Words'
230 if ( GetBitsAllocated() == 8 || GetBitsAllocated() == 24 )
235 // Change only made if usefull
236 if ( PixelVR != oldEntry->GetVR() )
238 //DictEntry* newDict = DictEntry::New(GrPixel,NumPixel,
239 // PixelVR,"1","Pixel Data");
240 //DataEntry *newEntry = DataEntry::New(newDict);
242 //newEntry->Copy(entry);
243 //newEntry->SetBinArea(oldEntry->GetBinArea(),oldEntry->IsSelfArea());
244 //oldEntry->SetSelfArea(false);
246 //RemoveEntry(oldEntry);
247 //AddEntry(newEntry);
248 //newEntry->Delete();
254 // 8 bits allocated is a 'OB(ytes)' , as well as 24 (old ACR-NEMA RGB)
255 // more than 8 (i.e 12, 16) is a 'OW(ords)'
256 if ( GetBitsAllocated() == 8 || GetBitsAllocated() == 24 )
260 // Change only made if usefull
261 if ( PixelVR != entry->GetVR() )
263 entry->SetVR(PixelVR);
270 * \brief This predicate, based on hopefully reasonable heuristics,
271 * decides whether or not the current File was properly parsed
272 * and contains the mandatory information for being considered as
273 * a well formed and usable Dicom/Acr File.
274 * @return true when File is the one of a reasonable Dicom/Acr file,
277 bool File::IsReadable()
279 if ( !Document::IsReadable() )
284 const std::string &res = GetEntryString(0x0028, 0x0005);
285 if ( res != GDCM_UNFOUND && atoi(res.c_str()) > 4 )
287 gdcmWarningMacro("Wrong Image Dimensions" << res);
288 return false; // Image Dimensions
290 bool b0028_0100 = true;
291 if ( !GetDocEntry(0x0028, 0x0100) )
293 gdcmWarningMacro("Bits Allocated (0028|0100) not found");
294 //return false; // "Bits Allocated"
297 bool b0028_0101 = true;
298 if ( !GetDocEntry(0x0028, 0x0101) )
300 gdcmWarningMacro("Bits Stored (0028|0101) not found");
301 //return false; // "Bits Stored"
304 bool b0028_0102 = true;
305 if ( !GetDocEntry(0x0028, 0x0102) )
307 gdcmWarningMacro("Hight Bit (0028|0102) not found");
308 //return false; // "High Bit"
311 bool b0028_0103 = true;
312 if ( !GetDocEntry(0x0028, 0x0103) )
314 gdcmWarningMacro("Pixel Representation (0028|0103) not found");
315 //return false; // "Pixel Representation" i.e. 'Sign' ( 0 : unsigned, 1 : signed)
319 if ( !b0028_0100 && !b0028_0101 && !b0028_0102 && !b0028_0103)
321 gdcmWarningMacro("Too much mandatory Tags missing !");
325 if ( !GetDocEntry(GrPixel, NumPixel) )
327 gdcmWarningMacro("Pixel Dicom Element " << std::hex <<
328 GrPixel << "|" << NumPixel << "not found");
329 return false; // Pixel Dicom Element not found :-(
335 * \brief gets the info from 0020,0013 : Image Number else 0.
336 * @return image number
338 int File::GetImageNumber()
340 //0020 0013 : Image Number
341 std::string strImNumber = GetEntryString(0x0020,0x0013);
342 if ( strImNumber != GDCM_UNFOUND )
344 return atoi( strImNumber.c_str() );
350 * \brief gets the info from 0008,0060 : Modality
351 * @return Modality Type
353 ModalityType File::GetModality()
355 // 0008 0060 : Modality
356 std::string strModality = GetEntryString(0x0008,0x0060);
357 if ( strModality != GDCM_UNFOUND )
359 if ( strModality.find("AU") < strModality.length()) return AU;
360 else if ( strModality.find("AS") < strModality.length()) return AS;
361 else if ( strModality.find("BI") < strModality.length()) return BI;
362 else if ( strModality.find("CF") < strModality.length()) return CF;
363 else if ( strModality.find("CP") < strModality.length()) return CP;
364 else if ( strModality.find("CR") < strModality.length()) return CR;
365 else if ( strModality.find("CT") < strModality.length()) return CT;
366 else if ( strModality.find("CS") < strModality.length()) return CS;
367 else if ( strModality.find("DD") < strModality.length()) return DD;
368 else if ( strModality.find("DF") < strModality.length()) return DF;
369 else if ( strModality.find("DG") < strModality.length()) return DG;
370 else if ( strModality.find("DM") < strModality.length()) return DM;
371 else if ( strModality.find("DS") < strModality.length()) return DS;
372 else if ( strModality.find("DX") < strModality.length()) return DX;
373 else if ( strModality.find("ECG") < strModality.length()) return ECG;
374 else if ( strModality.find("EPS") < strModality.length()) return EPS;
375 else if ( strModality.find("FA") < strModality.length()) return FA;
376 else if ( strModality.find("FS") < strModality.length()) return FS;
377 else if ( strModality.find("HC") < strModality.length()) return HC;
378 else if ( strModality.find("HD") < strModality.length()) return HD;
379 else if ( strModality.find("LP") < strModality.length()) return LP;
380 else if ( strModality.find("LS") < strModality.length()) return LS;
381 else if ( strModality.find("MA") < strModality.length()) return MA;
382 else if ( strModality.find("MR") < strModality.length()) return MR;
383 else if ( strModality.find("NM") < strModality.length()) return NM;
384 else if ( strModality.find("OT") < strModality.length()) return OT;
385 else if ( strModality.find("PT") < strModality.length()) return PT;
386 else if ( strModality.find("RF") < strModality.length()) return RF;
387 else if ( strModality.find("RG") < strModality.length()) return RG;
388 else if ( strModality.find("RTDOSE")
389 < strModality.length()) return RTDOSE;
390 else if ( strModality.find("RTIMAGE")
391 < strModality.length()) return RTIMAGE;
392 else if ( strModality.find("RTPLAN")
393 < strModality.length()) return RTPLAN;
394 else if ( strModality.find("RTSTRUCT")
395 < strModality.length()) return RTSTRUCT;
396 else if ( strModality.find("SM") < strModality.length()) return SM;
397 else if ( strModality.find("ST") < strModality.length()) return ST;
398 else if ( strModality.find("TG") < strModality.length()) return TG;
399 else if ( strModality.find("US") < strModality.length()) return US;
400 else if ( strModality.find("VF") < strModality.length()) return VF;
401 else if ( strModality.find("XA") < strModality.length()) return XA;
402 else if ( strModality.find("XC") < strModality.length()) return XC;
406 /// \todo throw error return value ???
407 /// specified <> unknown in our database
415 * \brief Retrieve the number of columns of image.
416 * @return The encountered size when found, 0 by default.
417 * 0 means the file is NOT USABLE. The caller will have to check
421 DataEntry *entry = GetDataEntry(0x0028,0x0011);
423 return (int)entry->GetValue(0);
428 * \brief Retrieve the number of lines of image.
429 * \warning The defaulted value is 1 as opposed to File::GetXSize()
430 * @return The encountered size when found, 1 by default
431 * (The ACR-NEMA file contains a Signal, not an Image).
435 DataEntry *entry = GetDataEntry(0x0028,0x0010);
437 return (int)entry->GetValue(0);
444 // The Rows (0028,0010) entry was optional for ACR/NEMA.
445 // (at least some images didn't have it.)
446 // It might hence be a signal (1D image). So we default to 1:
451 * \brief Retrieve the number of planes of volume or the number
452 * of frames of a multiframe.
453 * \warning When present we consider the "Number of Frames" as the third
454 * dimension. When missing we consider the third dimension as
455 * being the ACR-NEMA "Planes" tag content.
456 * @return The encountered size when found, 1 by default (single image).
460 // Both DicomV3 and ACR/Nema consider the "Number of Frames"
461 // as the third dimension.
462 DataEntry *entry = GetDataEntry(0x0028,0x0008);
464 return (int)entry->GetValue(0);
466 // We then consider the "Planes" entry as the third dimension
467 entry = GetDataEntry(0x0028,0x0012);
469 return (int)entry->GetValue(0);
474 * \brief Retrieve the -unnormalized- number of 'times' of '4D image'.
475 * User has to tell gdcm the location of this '4th Dimension component'
476 * using SetFourthDimensionLocation() method before.
477 * \warning The defaulted value is 1.
478 * @return The encountered size when found, 1 by default
479 * (The file doesn't contain a '4D image'.).
483 if (FourthDimensionLocation == TagKey(0,0) )// 4D location is not set : not a 4D object
486 DataEntry *entry = GetDataEntry(FourthDimensionLocation.GetGroup(),
487 FourthDimensionLocation.GetElement() );
490 gdcmWarningMacro( " FourthDimensionLocation not found at : " <<
491 std::hex << FourthDimensionLocation.GetGroup()
492 << "|" << FourthDimensionLocation.GetElement());
497 return (int)entry->GetValue(0);
502 * \brief gets the info from 0018,1164 : ImagerPixelSpacing
503 * then 0028,0030 : Pixel Spacing
505 * @return X dimension of a pixel
507 float File::GetXSpacing()
509 float xspacing = 1.0;
514 From:David Clunie - view profile
515 Date:Wed, May 24 2006 1:12 pm
516 Email:David Clunie <dclu...@dclunie.com>
517 Groups:comp.protocols.dicom
519 The short answer is that:
521 - (0018,1164) describes a spacing equivalent to that which
522 would be measured off a film in projection radiography
524 - (0018,7022) does not describe the image pixels themselves,
525 since detector elements may have been binned to produce
528 - (0018,7020) may be different from (0018,7022) since there
529 may be non-sensitive material separating individual
530 detectors (i.e. the size is smaller than the spacing
533 Only (0018,1164) is relevant when measuring things; the
534 detector-specific attributes are there to describe the
539 PS. For ultrasound you need to use Region Calibration.
543 It *SHOULD* first find the IOD and then deduce which tags to read
544 Eg: Cross section this is in Pixel Spacing (0028,0030)
545 CR is in Imager Pixel Spacing (0018,1164)
546 US is in Pixel Aspect Ratio (0028,0034)
548 (3002,0011) Image Plane Pixel Spacing
549 (3002,0012) RT Image Position
551 (3004,000c) for deducing Z spacing
554 std::string SOPClassUID = GetEntryString(0x0008,0x0016);
556 /// \todo check the various SOP Class
557 /// to get the Pixel Spacing at the proper location
559 ///\todo find images to check if it *actually* works
561 if (Util::DicomStringEqual( SOPClassUID,"1.2.840.10008.5.1.4.1.1.6")
562 // Ultrasound Image Storage (Retired)
563 || Util::DicomStringEqual( SOPClassUID,"1.2.840.10008.5.1.4.1.1.6.1")
564 // Ultrasound Image Storage
565 || Util::DicomStringEqual( SOPClassUID,"1.2.840.10008.5.1.4.1.1.3")
566 // Ultrasound Multi-Frame Storage (Retired)
567 || Util::DicomStringEqual( SOPClassUID,"1.2.840.10008.5.1.4.1.1.3.1") )
568 // Ultrasound Multi-FrameImage Storage
570 // - check if SOPClassUID contains 2 parts (e.g. "4\3")
571 // - guess how to deduce the spacing (FOV ?, ??)
573 entry = GetDataEntry(0x0028,0x0034);
576 nbValue = entry->GetValueCount();
578 gdcmWarningMacro("PixelAspectRatio (0x0028,0x0034) "
579 << "has a wrong number of values :" << nbValue);
581 xspacing = 1.0; // We get Pixel Aspect Ratio, not Spacing ...
589 if (Util::DicomStringEqual( SOPClassUID,"1.2.840.10008.5.1.4.1.1.1") )
590 // Computed Radiography Image Storage
592 // CR is in Imager Pixel Spacing (0018,1164)//
595 // go on with old method ...
596 // ---------------------
597 // To follow David Clunie's advice, we first check ImagerPixelSpacing
599 entry = GetDataEntry(0x0018,0x1164);
602 nbValue = entry->GetValueCount();
603 // Can't use IsValueCountValid because of the complex heuristic.
605 gdcmWarningMacro("ImagerPixelSpacing (0x0018,0x1164) "
606 << "has a wrong number of values :" << nbValue);
609 xspacing = (float)entry->GetValue(2);
610 else if( nbValue >= 2 )
611 xspacing = (float)entry->GetValue(1);
613 xspacing = (float)entry->GetValue(0);
615 if ( xspacing == 0.0 )
621 gdcmWarningMacro( "Unfound Imager Pixel Spacing (0018,1164)" );
624 entry = GetDataEntry(0x0028,0x0030);
627 nbValue = entry->GetValueCount();
629 gdcmWarningMacro("PixelSpacing (0x0018,0x0030) "
630 << "has a wrong number of values :" << nbValue);
633 xspacing = (float)entry->GetValue(2);
634 else if( nbValue >= 2 )
635 xspacing = (float)entry->GetValue(1);
637 xspacing = (float)entry->GetValue(0);
639 if ( xspacing == 0.0 )
645 gdcmWarningMacro( "Unfound Pixel Spacing (0028,0030)" );
651 * \brief gets the info from 0018,1164 : ImagerPixelSpacing
652 * then from 0028,0030 : Pixel Spacing
654 * @return Y dimension of a pixel
656 float File::GetYSpacing()
663 std::string SOPClassUID = GetEntryString(0x0008,0x0016);
665 /// \todo check the various SOP Class
666 /// to get the Pixel Spacing at the proper location
668 ///\todo find images to check if it *actually* works
670 if (Util::DicomStringEqual( SOPClassUID,"1.2.840.10008.5.1.4.1.1.6")
671 // Ultrasound Image Storage (Retired)
672 || Util::DicomStringEqual( SOPClassUID,"1.2.840.10008.5.1.4.1.1.6.1")
673 // Ultrasound Image Storage
674 || Util::DicomStringEqual( SOPClassUID,"1.2.840.10008.5.1.4.1.1.3")
675 // Ultrasound Multi-Frame Storage (Retired)
676 || Util::DicomStringEqual( SOPClassUID,"1.2.840.10008.5.1.4.1.1.3.1") )
677 // Ultrasound Multi-FrameImage Storage
679 // - check if SOPClassUID contains 2 parts (e.g. "4\3")
680 // - no way to deduce the spacing/
682 entry = GetDataEntry(0x0028,0x0034);
685 nbValue = entry->GetValueCount();
687 gdcmWarningMacro("PixelAspectRatio (0x0028,0x0034) "
688 << "has a wrong number of values :" << nbValue);
690 yspacing = (float)entry->GetValue(0)/(float)entry->GetValue(1);
691 //std::cout << "ys " << yspacing << std::endl;
700 // go on with old method ...
701 // ---------------------
702 // To follow David Clunie's advice, we first check ImagerPixelSpacing
705 entry = GetDataEntry(0x0018,0x1164);
708 yspacing = (float)entry->GetValue(0);
710 if ( yspacing == 0.0 )
716 gdcmWarningMacro( "Unfound Imager Pixel Spacing (0018,1164)" );
719 entry = GetDataEntry(0x0028,0x0030);
722 yspacing = (float)entry->GetValue(0);
724 if ( yspacing == 0.0 )
730 gdcmWarningMacro( "Unfound Pixel Spacing (0028,0030)" );
737 * \brief gets the info from 0018,0088 : Space Between Slices
738 * else from 0018,0050 : Slice Thickness
741 * When an element is missing, we suppose slices join together
742 * (no overlapping, no interslice gap) but we have no way to check it !
743 * For *Dicom* images, ZSpacing *should be* calculated using
744 * XOrigin, YOrigin, ZOrigin (of the top left image corner)
745 * of 2 consecutive images, and the Orientation
746 * Computing ZSpacing on a single image is not really meaningfull !
747 * @return Z dimension of a voxel-to be
749 float File::GetZSpacing()
752 float zspacing = 1.0f;
754 // Spacing Between Slices : distance between the middle of 2 slices
756 // jointives (Spacing between Slices = Slice Thickness)
757 // overlapping (Spacing between Slices < Slice Thickness)
758 // disjointes (Spacing between Slices > Slice Thickness)
759 // Slice Thickness : epaisseur de tissus sur laquelle est acquis le signal
760 // It only concerns the MRI guys, not people wanting to visualize volumes
761 // If Spacing Between Slices is missing,
762 // we suppose slices joint together
763 DataEntry *entry = GetDataEntry(0x0018,0x0088);
766 zspacing = (float)entry->GetValue(0);
768 if ( zspacing == 0.0 )
773 gdcmWarningMacro("Unfound Spacing Between Slices (0018,0088)");
775 // if no 'Spacing Between Slices' is found,
776 // we assume slices join together
777 // (no overlapping, no interslice gap)
778 entry = GetDataEntry(0x0018,0x0050);
781 zspacing = (float)entry->GetValue(0);
783 if ( zspacing == 0.0 )
788 gdcmWarningMacro("Unfound Slice Thickness (0018,0050)");
790 // if no 'Spacing Between Slices' is found,
791 // we assume slices join together
792 // (no overlapping, no interslice gap)
793 entry = GetDataEntry(0x3004,0x000c);
796 float z1 = (float)entry->GetValue(0);
797 float z2 = (float)entry->GetValue(1);
798 zspacing = z2 - z1; // can be negative...
800 if ( zspacing == 0.0 )
809 * \brief gets the info from 0020,0032 : Image Position Patient
810 * else from 0020,0030 : Image Position (RET)
812 * @return up-left image corner X position
814 float File::GetXOrigin()
816 DataEntry *entry = GetDataEntry(0x0020,0x0032);
819 gdcmWarningMacro( "Unfound Image Position Patient (0020,0032)");
820 entry = GetDataEntry(0x0020,0x0030);
823 gdcmWarningMacro( "Unfound Image Position (RET) (0020,0030)");
828 if( entry->GetValueCount() == 3 )
830 if (!entry->IsValueCountValid() )
832 gdcmErrorMacro( "Invalid Value Count" );
834 return (float)entry->GetValue(0);
840 * \brief gets the info from 0020,0032 : Image Position Patient
841 * else from 0020,0030 : Image Position (RET)
843 * @return up-left image corner Y position
845 float File::GetYOrigin()
847 DataEntry *entry = GetDataEntry(0x0020,0x0032);
850 gdcmWarningMacro( "Unfound Image Position Patient (0020,0032)");
851 entry = GetDataEntry(0x0020,0x0030);
854 gdcmWarningMacro( "Unfound Image Position (RET) (0020,0030)");
859 if( entry->GetValueCount() == 3 )
861 if (!entry->IsValueCountValid() )
863 gdcmErrorMacro( "Invalid Value Count" );
865 return (float)entry->GetValue(1);
871 * \brief gets the info from 0020,0032 : Image Position Patient
872 * else from 0020,0030 : Image Position (RET)
873 * else from 0020,1041 : Slice Location
874 * else from 0020,0050 : Location
876 * @return up-left image corner Z position
878 float File::GetZOrigin()
880 DataEntry *entry = GetDataEntry(0x0020,0x0032);
883 if( entry->GetValueCount() == 3 )
885 if (!entry->IsValueCountValid() )
887 gdcmErrorMacro( "Invalid Value Count" );
889 return (float)entry->GetValue(2);
891 gdcmWarningMacro( "Wrong Image Position Patient (0020,0032)");
895 entry = GetDataEntry(0x0020,0x0030);
898 if( entry->GetValueCount() == 3 )
900 if (!entry->IsValueCountValid() )
902 gdcmErrorMacro( "Invalid Value Count" );
904 return (float)entry->GetValue(2);
906 gdcmWarningMacro( "Wrong Image Position (RET) (0020,0030)");
910 // for *very* old ACR-NEMA images
911 entry = GetDataEntry(0x0020,0x1041);
914 if( entry->GetValueCount() == 1 )
916 if (!entry->IsValueCountValid() )
918 gdcmErrorMacro( "Invalid Value Count" );
920 return (float)entry->GetValue(0); // VM=1 !
922 gdcmWarningMacro( "Wrong Slice Location (0020,1041)");
926 entry = GetDataEntry(0x0020,0x0050);
929 if( entry->GetValueCount() == 1 )
931 if (!entry->IsValueCountValid() )
933 gdcmErrorMacro( "Invalid Value Count" );
935 return (float)entry->GetValue(0);
937 gdcmWarningMacro( "Wrong Location (0020,0050)");
940 return 0.; // Hopeless
944 * \brief gets the info from 0020,0037 : Image Orientation Patient
945 * or from 0020 0035 : Image Orientation (RET)
947 * (needed to organize DICOM files based on their x,y,z position)
949 * @param iop adress of the (6)float array to receive values.
950 * (defaulted as 1.,0.,0.,0.,1.,0. if nothing -or inconsistent stuff-
952 * @return true when one of the tag -with consistent values- is found
953 * false when nothing or inconsistent stuff - is found
955 bool File::GetImageOrientationPatient( float iop[6] )
957 std::string strImOriPat;
958 //iop is supposed to be float[6]
959 iop[0] = iop[4] = 1.;
960 iop[1] = iop[2] = iop[3] = iop[5] = 0.;
962 // 0020 0037 DS REL Image Orientation (Patient)
963 if ( (strImOriPat = GetEntryString(0x0020,0x0037)) != GDCM_UNFOUND )
965 if ( sscanf( strImOriPat.c_str(), "%f \\ %f \\%f \\%f \\%f \\%f ",
966 &iop[0], &iop[1], &iop[2], &iop[3], &iop[4], &iop[5]) != 6 )
968 gdcmWarningMacro( "Wrong Image Orientation Patient (0020,0037)."
969 << " Less than 6 values were found." );
975 // 0020 0035 DS REL Image Orientation (RET)
976 else if ( (strImOriPat = GetEntryString(0x0020,0x0035)) != GDCM_UNFOUND )
978 if ( sscanf( strImOriPat.c_str(), "%f \\ %f \\%f \\%f \\%f \\%f ",
979 &iop[0], &iop[1], &iop[2], &iop[3], &iop[4], &iop[5]) != 6 )
981 gdcmWarningMacro( "wrong Image Orientation Patient (0020,0035). "
982 << "Less than 6 values were found." );
991 * \brief Retrieve the number of Bits Stored (actually used)
992 * (as opposed to number of Bits Allocated)
993 * @return The encountered number of Bits Stored, 0 by default.
994 * 0 means the file is NOT USABLE. The caller has to check it !
996 int File::GetBitsStored()
998 DataEntry *entry = GetDataEntry(0x0028,0x0101);
1001 gdcmWarningMacro("BitsStored (0028,0101) is supposed to be mandatory");
1004 return (int)entry->GetValue(0);
1008 * \brief Retrieve the number of Bits Allocated
1009 * (8, 12 -compacted ACR-NEMA files-, 16, 24 -old RGB ACR-NEMA files-,)
1010 * @return The encountered Number of Bits Allocated, 0 by default.
1011 * 0 means the file is NOT USABLE. The caller has to check it !
1013 int File::GetBitsAllocated()
1015 DataEntry *entry = GetDataEntry(0x0028,0x0100);
1018 gdcmWarningMacro("BitsAllocated (0028,0100) is supposed to be mandatory");
1021 return (int)entry->GetValue(0);
1025 * \brief Retrieve the high bit position.
1026 * \warning The method defaults to 0 when information is missing.
1027 * The responsability of checking this value is left to the caller.
1028 * @return The high bit position when present. 0 when missing.
1030 int File::GetHighBitPosition()
1032 DataEntry *entry = GetDataEntry(0x0028,0x0102);
1035 gdcmWarningMacro("HighBitPosition (0028,0102) is supposed to be mandatory");
1038 return (int)entry->GetValue(0);
1042 * \brief Retrieve the number of Samples Per Pixel
1043 * (1 : gray level, 3 : RGB/YBR -1 or 3 Planes-)
1044 * @return The encountered number of Samples Per Pixel, 1 by default.
1045 * (we assume Gray level Pixels)
1047 int File::GetSamplesPerPixel()
1049 DataEntry *entry = GetDataEntry(0x0028,0x0002);
1052 gdcmWarningMacro("SamplesPerPixel (0028,0002) is supposed to be mandatory");
1053 return 1; // Well, it's supposed to be mandatory ...
1054 // but sometimes it's missing : *we* assume Gray pixels
1056 return (int)entry->GetValue(0);
1060 * \brief Retrieve the Planar Configuration for RGB images
1061 * (0 : RGB Pixels , 1 : R Plane + G Plane + B Plane)
1062 * @return The encountered Planar Configuration, 0 by default.
1064 int File::GetPlanarConfiguration()
1066 DataEntry *entry = GetDataEntry(0x0028,0x0006);
1071 return (int)entry->GetValue(0);
1075 * \brief Return the size (in bytes) of a single pixel of data.
1076 * @return The size in bytes of a single pixel of data; 0 by default
1077 * 0 means the file is NOT USABLE; the caller will have to check
1079 int File::GetPixelSize()
1081 // 0028 0100 US IMG Bits Allocated
1082 // (in order no to be messed up by old ACR-NEMA RGB images)
1083 assert( !(GetEntryString(0x0028,0x0100) == "24") );
1085 std::string pixelType = GetPixelType();
1086 if ( pixelType == "8U" || pixelType == "8S" )
1090 if ( pixelType == "16U" || pixelType == "16S")
1094 if ( pixelType == "32U" || pixelType == "32S")
1098 if ( pixelType == "FD" )
1102 gdcmWarningMacro( "Unknown pixel type: " << pixelType);
1107 * \brief Build the Pixel Type of the image.
1108 * Possible values are:
1109 * - 8U unsigned 8 bit,
1110 * - 8S signed 8 bit,
1111 * - 16U unsigned 16 bit,
1112 * - 16S signed 16 bit,
1113 * - 32U unsigned 32 bit,
1114 * - 32S signed 32 bit,
1115 * - FD floating double 64 bits (Not kosher DICOM, but so usefull!)
1116 * \warning 12 bit images appear as 16 bit.
1117 * 24 bit images appear as 8 bit + photochromatic interp ="RGB "
1118 * + Planar Configuration = 0
1119 * @return 0S if nothing found. NOT USABLE file. The caller has to check
1121 std::string File::GetPixelType()
1123 std::string bitsAlloc = GetEntryString(0x0028, 0x0100); // Bits Allocated
1124 if ( bitsAlloc == GDCM_UNFOUND )
1126 gdcmWarningMacro( "Bits Allocated (0028,0100) supposed to be mandatory");
1127 bitsAlloc = "16"; // default and arbitrary value, not to polute the output
1130 if ( bitsAlloc == "64" )
1134 else if ( bitsAlloc == "12" )
1136 // It will be unpacked
1139 else if ( bitsAlloc == "24" )
1141 // (in order no to be messed up by old RGB images)
1146 if( IsSignedPixelData() )
1154 return bitsAlloc + sign;
1158 * \brief Check whether the pixels are signed (1) or UNsigned (0) data.
1159 * \warning The method defaults to false (UNsigned) when tag 0028|0103
1161 * The responsability of checking this value is left to the caller
1162 * (NO transformation is performed on the pixels to make then >0)
1163 * @return True when signed, false when UNsigned
1165 bool File::IsSignedPixelData()
1167 DataEntry *entry = GetDataEntry(0x0028, 0x0103);//"Pixel Representation"
1170 gdcmWarningMacro( "Pixel Representation (0028,0103) supposed to be "
1174 return entry->GetValue(0) != 0;
1178 * \brief Check whether this a monochrome picture (gray levels) or not,
1179 * using "Photometric Interpretation" tag (0x0028,0x0004).
1180 * @return true when "MONOCHROME1" or "MONOCHROME2". False otherwise.
1182 bool File::IsMonochrome()
1184 const std::string &PhotometricInterp = GetEntryString( 0x0028, 0x0004 );
1185 if ( Util::DicomStringEqual(PhotometricInterp, "MONOCHROME1")
1186 || Util::DicomStringEqual(PhotometricInterp, "MONOCHROME2") )
1190 if ( PhotometricInterp == GDCM_UNFOUND )
1192 gdcmWarningMacro( "Photometric Interpretation (0028,0004) supposed to be "
1199 * \brief Check whether this a MONOCHROME1 picture (high values = dark)
1200 * or not using "Photometric Interpretation" tag (0x0028,0x0004).
1201 * @return true when "MONOCHROME1" . False otherwise.
1203 bool File::IsMonochrome1()
1205 const std::string &PhotometricInterp = GetEntryString( 0x0028, 0x0004 );
1206 if ( Util::DicomStringEqual(PhotometricInterp, "MONOCHROME1") )
1210 if ( PhotometricInterp == GDCM_UNFOUND )
1212 gdcmWarningMacro( "Photometric Interpretation (0028,0004) : supposed to"
1213 << " be mandatory! ");
1219 * \brief Check whether this a "PALETTE COLOR" picture or not by accessing
1220 * the "Photometric Interpretation" tag ( 0x0028, 0x0004 ).
1221 * @return true when "PALETTE COLOR". False otherwise.
1223 bool File::IsPaletteColor()
1225 std::string PhotometricInterp = GetEntryString( 0x0028, 0x0004 );
1226 if ( PhotometricInterp == "PALETTE COLOR " )
1230 if ( PhotometricInterp == GDCM_UNFOUND )
1232 gdcmDebugMacro( "Not found : Palette color (0028,0004)");
1238 * \brief Check whether this a "YBR_FULL" color picture or not by accessing
1239 * the "Photometric Interpretation" tag ( 0x0028, 0x0004 ).
1240 * @return true when "YBR_FULL". False otherwise.
1242 bool File::IsYBRFull()
1244 std::string PhotometricInterp = GetEntryString( 0x0028, 0x0004 );
1245 if ( PhotometricInterp == "YBR_FULL" )
1249 if ( PhotometricInterp == GDCM_UNFOUND )
1251 gdcmDebugMacro( "Not found : YBR Full (0028,0004)");
1257 * \brief tells us if LUT are used
1258 * \warning Right now, 'Segmented xxx Palette Color Lookup Table Data'
1259 * are NOT considered as LUT, since nobody knows
1260 * how to deal with them
1261 * Please warn me if you know sbdy that *does* know ... jprx
1262 * @return true if LUT Descriptors and LUT Tables were found
1266 // Check the presence of the LUT Descriptors, and LUT Tables
1268 if ( !GetDocEntry(0x0028,0x1101) )
1272 // LutDescriptorGreen
1273 if ( !GetDocEntry(0x0028,0x1102) )
1277 // LutDescriptorBlue
1278 if ( !GetDocEntry(0x0028,0x1103) )
1282 // Red Palette Color Lookup Table Data
1283 if ( !GetDocEntry(0x0028,0x1201) )
1287 // Green Palette Color Lookup Table Data
1288 if ( !GetDocEntry(0x0028,0x1202) )
1292 // Blue Palette Color Lookup Table Data
1293 if ( !GetDocEntry(0x0028,0x1203) )
1298 // FIXME : (0x0028,0x3006) : LUT Data (CTX dependent)
1299 // NOT taken into account, but we don't know how to use it ...
1304 * \brief gets the info from 0028,1101 : Lookup Table Desc-Red
1306 * @return Lookup Table number of Bits , 0 by default
1307 * when (0028,0004),Photometric Interpretation = [PALETTE COLOR ]
1308 * @ return bit number of each LUT item
1310 int File::GetLUTNbits()
1312 std::vector<std::string> tokens;
1315 //Just hope Lookup Table Desc-Red = Lookup Table Desc-Red
1316 // = Lookup Table Desc-Blue
1317 // Consistency already checked in GetLUTLength
1318 std::string lutDescription = GetEntryString(0x0028,0x1101);
1319 if ( lutDescription == GDCM_UNFOUND )
1324 tokens.clear(); // clean any previous value
1325 Util::Tokenize ( lutDescription, tokens, "\\" );
1326 //LutLength=atoi(tokens[0].c_str());
1327 //LutDepth=atoi(tokens[1].c_str());
1329 lutNbits = atoi( tokens[2].c_str() );
1336 *\brief gets the info from 0028,1052 : Rescale Intercept
1337 * @return Rescale Intercept. defaulted to 0.0 is not found or empty
1339 float File::GetRescaleIntercept()
1341 // 0028 1052 DS IMG Rescale Intercept
1342 DataEntry *entry = GetDataEntry(0x0028, 0x1052);
1345 gdcmWarningMacro( "Missing Rescale Intercept (0028,1052)");
1348 return (float)entry->GetValue(0);
1353 *\brief gets the info from 0028,1053 : Rescale Slope
1354 * @return Rescale Slope. defaulted to 1.0 is not found or empty
1356 float File::GetRescaleSlope()
1358 // 0028 1053 DS IMG Rescale Slope
1359 DataEntry *entry = GetDataEntry(0x0028, 0x1053);
1362 gdcmDebugMacro( "Missing Rescale Slope (0028,1053)");
1365 return (float)entry->GetValue(0);
1369 * \brief This function is intended to user who doesn't want
1370 * to have to manage a LUT and expects to get an RBG Pixel image
1371 * (or a monochrome one, if no LUT found ...)
1372 * \warning to be used with GetImagePixels()
1373 * @return 1 if Gray level, 3 if Color (RGB, YBR, *or PALETTE COLOR*)
1375 int File::GetNumberOfScalarComponents()
1377 if ( GetSamplesPerPixel() == 3 )
1382 // 0028 0100 US IMG Bits Allocated
1383 // (in order no to be messed up by old RGB images)
1384 if ( GetEntryString(0x0028,0x0100) == "24" )
1389 std::string strPhotometricInterpretation = GetEntryString(0x0028,0x0004);
1391 if ( ( strPhotometricInterpretation == "PALETTE COLOR ") )
1393 if ( HasLUT() )// PALETTE COLOR is NOT enough
1403 // beware of trailing space at end of string
1404 // DICOM tags are never of odd length
1405 if ( strPhotometricInterpretation == GDCM_UNFOUND ||
1406 Util::DicomStringEqual(strPhotometricInterpretation, "MONOCHROME1") ||
1407 Util::DicomStringEqual(strPhotometricInterpretation, "MONOCHROME2") )
1413 // we assume that *all* kinds of YBR are dealt with
1419 * \brief This function is intended to user that DOESN'T want
1420 * to get RGB pixels image when it's stored as a PALETTE COLOR image
1421 * - the (vtk) user is supposed to know how deal with LUTs -
1422 * \warning to be used with GetImagePixelsRaw()
1423 * @return 1 if Gray level, 3 if Color (RGB or YBR - NOT 'PALETTE COLOR' -)
1425 int File::GetNumberOfScalarComponentsRaw()
1427 // 0028 0100 US IMG Bits Allocated
1428 // (in order no to be messed up by old RGB images)
1429 if ( File::GetEntryString(0x0028,0x0100) == "24" )
1434 // we assume that *all* kinds of YBR are dealt with
1435 return GetSamplesPerPixel();
1439 * \brief Recover the offset (from the beginning of the file)
1440 * of *image* pixels (not *icone image* pixels, if any !)
1441 * @return Pixel Offset
1443 size_t File::GetPixelOffset()
1445 DocEntry *pxlElement = GetDocEntry(GrPixel, NumPixel);
1448 return pxlElement->GetOffset();
1452 gdcmWarningMacro( "Big trouble : Pixel Element ("
1453 << std::hex << GrPixel<<","<< NumPixel<< ") NOT found" );
1459 * \brief Recover the pixel area length (in Bytes)
1460 * @return Pixel Element Length, as stored in the header
1461 * (NOT the memory space necessary to hold the Pixels
1462 * -in case of embeded compressed image-)
1463 * 0 : NOT USABLE file. The caller has to check.
1465 size_t File::GetPixelAreaLength()
1467 DocEntry *pxlElement = GetDocEntry(GrPixel, NumPixel);
1470 return pxlElement->GetLength();
1474 gdcmWarningMacro( "Big trouble : Pixel Element ("
1475 << std::hex << GrPixel<<","<< NumPixel<< ") NOT found" );
1481 * \brief Adds the characteristics of a new element we want to anonymize
1482 * @param group Group number of the target tag.
1483 * @param elem Element number of the target tag.
1484 * @param value new value (string) to substitute with
1486 void File::AddAnonymizeElement (uint16_t group, uint16_t elem,
1487 std::string const &value)
1493 UserAnonymizeList.push_back(el);
1497 * \brief Overwrites in the file the values of the DicomElements
1500 void File::AnonymizeNoLoad()
1502 std::fstream *fp = new std::fstream(Filename.c_str(),
1503 std::ios::in | std::ios::out | std::ios::binary);
1507 uint32_t valLgth = 0;
1508 std::string *spaces;
1509 for (ListElements::iterator it = UserAnonymizeList.begin();
1510 it != UserAnonymizeList.end();
1514 //std::cout << "File::AnonymizeNoLoad -------" << std::hex <<(*it).Group <<"|"<<
1516 // << "[" << (*it).Value << "] "<< std::dec << std::endl;
1517 d = GetDocEntry( (*it).Group, (*it).Elem);
1522 if ( dynamic_cast<SeqEntry *>(d) )
1524 gdcmWarningMacro( "You cannot 'Anonymize' a SeqEntry ");
1528 valLgth = (*it).Value.size();
1532 offset = d->GetOffset();
1533 lgth = d->GetLength();
1535 //std::cout << "lgth " << lgth << " valLgth " << valLgth << std::endl;
1538 spaces = new std::string( lgth-valLgth, ' ');
1539 (*it).Value = (*it).Value + *spaces;
1540 //std::cout << "[" << (*it).Value << "] " << lgth << std::endl;
1543 fp->seekp( offset, std::ios::beg );
1544 fp->write( (*it).Value.c_str(), lgth );
1552 * \brief anonymize a File (remove Patient's personal info passed with
1553 * AddAnonymizeElement()
1554 * \note You cannot Anonymize a DataEntry (to be fixed)
1556 bool File::AnonymizeFile()
1558 // If Anonymisation list is empty, let's perform some basic anonymization
1559 if ( UserAnonymizeList.begin() == UserAnonymizeList.end() )
1561 // If exist, replace by spaces
1562 SetEntryString(" ",0x0010, 0x2154); // Telephone
1563 SetEntryString(" ",0x0010, 0x1040); // Adress
1564 SetEntryString(" ",0x0010, 0x0020); // Patient ID
1566 DocEntry *patientNameHE = GetDocEntry (0x0010, 0x0010);
1568 if ( patientNameHE ) // we replace it by Study Instance UID (why not ?)
1570 std::string studyInstanceUID = GetEntryString (0x0020, 0x000d);
1571 if ( studyInstanceUID != GDCM_UNFOUND )
1573 SetEntryString(studyInstanceUID, 0x0010, 0x0010);
1577 SetEntryString("anonymized", 0x0010, 0x0010);
1584 for (ListElements::iterator it = UserAnonymizeList.begin();
1585 it != UserAnonymizeList.end();
1588 d = GetDocEntry( (*it).Group, (*it).Elem);
1593 if ( dynamic_cast<SeqEntry *>(d) )
1595 gdcmWarningMacro( "You cannot 'Anonymize' a SeqEntry ");
1599 if ( dynamic_cast<DataEntry *>(d) )
1601 gdcmWarningMacro( "To 'Anonymize' a DataEntry, better use AnonymizeNoLoad (FIXME) ");
1605 SetEntryString ((*it).Value, (*it).Group, (*it).Elem);
1609 // In order to make definitively impossible any further identification
1610 // remove or replace all the stuff that contains a Date
1612 //0008 0012 DA ID Instance Creation Date
1613 //0008 0020 DA ID Study Date
1614 //0008 0021 DA ID Series Date
1615 //0008 0022 DA ID Acquisition Date
1616 //0008 0023 DA ID Content Date
1617 //0008 0024 DA ID Overlay Date
1618 //0008 0025 DA ID Curve Date
1619 //0008 002a DT ID Acquisition Datetime
1620 //0018 9074 DT ACQ Frame Acquisition Datetime
1621 //0018 9151 DT ACQ Frame Reference Datetime
1622 //0018 a002 DT ACQ Contribution Date Time
1623 //0020 3403 SH REL Modified Image Date (RET)
1624 //0032 0032 DA SDY Study Verified Date
1625 //0032 0034 DA SDY Study Read Date
1626 //0032 1000 DA SDY Scheduled Study Start Date
1627 //0032 1010 DA SDY Scheduled Study Stop Date
1628 //0032 1040 DA SDY Study Arrival Date
1629 //0032 1050 DA SDY Study Completion Date
1630 //0038 001a DA VIS Scheduled Admission Date
1631 //0038 001c DA VIS Scheduled Discharge Date
1632 //0038 0020 DA VIS Admitting Date
1633 //0038 0030 DA VIS Discharge Date
1634 //0040 0002 DA PRC Scheduled Procedure Step Start Date
1635 //0040 0004 DA PRC Scheduled Procedure Step End Date
1636 //0040 0244 DA PRC Performed Procedure Step Start Date
1637 //0040 0250 DA PRC Performed Procedure Step End Date
1638 //0040 2004 DA PRC Issue Date of Imaging Service Request
1639 //0040 4005 DT PRC Scheduled Procedure Step Start Date and Time
1640 //0040 4011 DT PRC Expected Completion Date and Time
1641 //0040 a030 DT PRC Verification Date Time
1642 //0040 a032 DT PRC Observation Date Time
1643 //0040 a120 DT PRC DateTime
1644 //0040 a121 DA PRC Date
1645 //0040 a13a DT PRC Referenced Datetime
1646 //0070 0082 DA ??? Presentation Creation Date
1647 //0100 0420 DT ??? SOP Autorization Date and Time
1648 //0400 0105 DT ??? Digital Signature DateTime
1649 //2100 0040 DA PJ Creation Date
1650 //3006 0008 DA SSET Structure Set Date
1651 //3008 0024 DA ??? Treatment Control Point Date
1652 //3008 0054 DA ??? First Treatment Date
1653 //3008 0056 DA ??? Most Recent Treatment Date
1654 //3008 0162 DA ??? Safe Position Exit Date
1655 //3008 0166 DA ??? Safe Position Return Date
1656 //3008 0250 DA ??? Treatment Date
1657 //300a 0006 DA RT RT Plan Date
1658 //300a 022c DA RT Air Kerma Rate Reference Date
1659 //300e 0004 DA RT Review Date
1665 * \brief Performs some consistency checking on various 'File related'
1666 * (as opposed to 'DicomDir related') entries
1667 * then writes in a file all the (Dicom Elements) included the Pixels
1668 * @param fileName file name to write to
1669 * @param writetype type of the file to be written
1670 * (ACR, ExplicitVR, ImplicitVR)
1672 bool File::Write(std::string fileName, FileType writetype)
1674 std::ofstream *fp = new std::ofstream(fileName.c_str(),
1675 std::ios::out | std::ios::binary);
1678 gdcmWarningMacro("Failed to open (write) File: " << fileName.c_str());
1682 // Entry : 0002|0000 = group length -> recalculated
1683 DataEntry *e0000 = GetDataEntry(0x0002,0x0000);
1686 std::ostringstream sLen;
1687 sLen << ComputeGroup0002Length( );
1688 e0000->SetString(sLen.str());
1691 /// \todo FIXME : Derma?.dcm does not have it...let's remove it ?!? JPRx
1692 if( writetype != JPEG )
1694 int i_lgPix = GetEntryLength(GrPixel, NumPixel);
1697 // no (GrPixel, NumPixel) element
1698 std::string s_lgPix = Util::Format("%d", i_lgPix+12);
1699 s_lgPix = Util::DicomString( s_lgPix.c_str() );
1700 InsertEntryString(s_lgPix,GrPixel, 0x0000, "UL");
1703 Document::WriteContent(fp, writetype);
1711 //-----------------------------------------------------------------------------
1715 //-----------------------------------------------------------------------------
1718 * \brief Parse pixel data from disk of [multi-]fragment RLE encoding.
1719 * Compute the RLE extra information and store it in \ref RLEInfo
1720 * for later pixel retrieval usage.
1722 void File::ComputeRLEInfo()
1724 std::string ts = GetTransferSyntax();
1725 if ( !Global::GetTS()->IsRLELossless(ts) )
1730 // Encoded pixel data: for the time being we are only concerned with
1731 // Jpeg or RLE Pixel data encodings.
1732 // As stated in PS 3.5-2003, section 8.2 p44:
1733 // "If sent in Encapsulated Format (i.e. other than the Native Format) the
1734 // value representation OB is used".
1735 // Hence we expect an OB value representation. Concerning OB VR,
1736 // the section PS 3.5-2003, section A.4.c p 58-59, states:
1737 // "For the Value Representations OB and OW, the encoding shall meet the
1738 // following specifications depending on the Data element tag:"
1740 // - the first item in the sequence of items before the encoded pixel
1741 // data stream shall be basic offset table item. The basic offset table
1742 // item value, however, is not required to be present"
1743 ReadEncapsulatedBasicOffsetTable();
1745 // Encapsulated RLE Compressed Images (see PS 3.5-2003, Annex G)
1746 // Loop on the individual frame[s] and store the information
1747 // on the RLE fragments in a RLEFramesInfo.
1748 // Note: - when only a single frame is present, this is a
1750 // - when more than one frame are present, then we are in
1751 // the case of a multi-frame image.
1755 while ( (frameLength = ReadTagLength(0xfffe, 0xe000)) != 0 )
1757 // Since we have read the basic offset table, let's check the value were correct
1758 // or else produce a warning:
1759 if ( BasicOffsetTableItemValue )
1761 // If a BasicOffsetTableItemValue was read
1762 uint32_t individualLength = BasicOffsetTableItemValue[i];
1763 assert( individualLength == sum ); // REMOVE that if this is a problem
1764 if( individualLength != sum )
1766 gdcmWarningMacro( "BasicOffsetTableItemValue differs from the fragment lenght" );
1768 sum += frameLength + 8;
1771 // Parse the RLE Header and store the corresponding RLE Segment
1772 // Offset Table information on fragments of this current Frame.
1773 // Note that the fragment pixels themselves are not loaded
1774 // (but just skipped).
1775 long frameOffset = Fp->tellg(); // once per fragment
1777 uint32_t nbRleSegments = ReadInt32();
1778 if ( nbRleSegments > 16 )
1780 // There should be at most 15 segments (refer to RLEFrame class)
1781 gdcmWarningMacro( "Too many segments.");
1784 uint32_t rleSegmentOffsetTable[16];
1785 for( int k = 1; k <= 15; k++ )
1787 rleSegmentOffsetTable[k] = ReadInt32();
1790 // Deduce from both RLE Header and frameLength
1791 // the fragment length, and again store this info
1792 // in a RLEFramesInfo.
1793 long rleSegmentLength[15];
1794 // skipping (not reading) RLE Segments
1795 if ( nbRleSegments > 1)
1797 for(unsigned int k = 1; k <= nbRleSegments-1; k++)
1799 rleSegmentLength[k] = rleSegmentOffsetTable[k+1]
1800 - rleSegmentOffsetTable[k];
1801 SkipBytes(rleSegmentLength[k]);
1805 rleSegmentLength[nbRleSegments] = frameLength
1806 - rleSegmentOffsetTable[nbRleSegments];
1807 SkipBytes(rleSegmentLength[nbRleSegments]);
1809 // Store the collected info
1810 RLEFrame *newFrame = new RLEFrame;
1811 newFrame->SetNumberOfFragments(nbRleSegments);
1812 for( unsigned int uk = 1; uk <= nbRleSegments; uk++ )
1814 newFrame->SetOffset(uk,frameOffset + rleSegmentOffsetTable[uk]);
1815 newFrame->SetLength(uk,rleSegmentLength[uk]);
1817 RLEInfo->AddFrame(newFrame);
1820 // Make sure that we encounter a 'Sequence Delimiter Item'
1821 // at the end of the item :
1822 if ( !ReadTag(0xfffe, 0xe0dd) ) // once per RLE File
1824 gdcmWarningMacro( "No sequence delimiter item at end of RLE item sequence");
1829 * \brief Parse pixel data from disk of [multi-]fragment Jpeg encoding.
1830 * Compute the jpeg extra information (fragment[s] offset[s] and
1831 * length) and store it[them] in \ref JPEGInfo for later pixel
1834 void File::ComputeJPEGFragmentInfo()
1836 // If you need to, look for comments of ComputeRLEInfo().
1837 std::string ts = GetTransferSyntax();
1838 if ( ! Global::GetTS()->IsJPEG(ts) )
1843 ReadEncapsulatedBasicOffsetTable();
1845 // Loop on the fragments[s] and store the parsed information in a
1847 long fragmentLength;
1850 while ( (fragmentLength = ReadTagLength(0xfffe, 0xe000)) != 0 )
1852 // Since we have read the basic offset table, let's check the value were correct
1853 // or else produce a warning:
1854 // A.4 Transfer syntaxes for encapsulation of encoded pixel data:
1855 // When the Item Value is present, the Basic Offset Table Item Value shall contain
1856 // concatenated 32-bit unsigned integer values that are byte offsets to the first
1857 // byte of the Item Tag of the first fragment for each frame in the Sequence of
1858 // Items. These offsets are measured from the first byte of the first Item Tag
1859 // following the Basic Offset Table item (See Table A.4-2).
1861 if ( BasicOffsetTableItemValue )
1863 // If a BasicOffsetTableItemValue was read
1864 uint32_t individualLength = BasicOffsetTableItemValue[i];
1865 //assert( individualLength == sum ); // Seems like 00191113.dcm is off by one ??
1866 if( individualLength != sum )
1868 gdcmWarningMacro( "BasicOffsetTableItemValue differs from the fragment lenght:" <<
1869 individualLength << " != " << sum );
1871 sum += fragmentLength + 8;
1875 long fragmentOffset = Fp->tellg(); // Once per fragment
1876 // Store the collected info
1877 JPEGFragment *newFragment = new JPEGFragment;
1878 newFragment->SetOffset(fragmentOffset);
1879 newFragment->SetLength(fragmentLength);
1880 JPEGInfo->AddFragment(newFragment);
1882 SkipBytes(fragmentLength);
1885 // Make sure that we encounter a 'Sequence Delimiter Item'
1886 // at the end of the item :
1887 if ( !ReadTag(0xfffe, 0xe0dd) )
1889 gdcmWarningMacro( "No sequence delimiter item at end of JPEG item sequence");
1894 * \brief Assuming the internal file pointer \ref Document::Fp
1895 * is placed at the beginning of a tag, check whether this
1896 * tag is (TestGroup, TestElem).
1897 * \warning On success the internal file pointer \ref Document::Fp
1898 * is modified to point after the tag.
1899 * On failure (i.e. when the tag wasn't the expected tag
1900 * (TestGroup, TestElem) the internal file pointer
1901 * \ref Document::Fp is restored to it's original position.
1902 * @param testGroup The expected group of the tag.
1903 * @param testElem The expected Element of the tag.
1904 * @return True on success, false otherwise.
1906 bool File::ReadTag(uint16_t testGroup, uint16_t testElem)
1908 long positionOnEntry = Fp->tellg(); // Only when reading fragments
1909 //long currentPosition = positionOnEntry; // On debugging purposes
1911 // Read the Item Tag group and element, and make
1912 // sure they are what we expected:
1913 uint16_t itemTagGroup;
1914 uint16_t itemTagElem;
1917 itemTagGroup = ReadInt16();
1918 itemTagElem = ReadInt16();
1920 catch ( FormatError )
1922 gdcmErrorMacro( "Can not read tag for "
1923 << " We should have found tag ("
1924 << DictEntry::TranslateToKey(testGroup,testElem) << ")"
1929 if ( itemTagGroup != testGroup || itemTagElem != testElem )
1931 // in order not to pollute output we don't warn on 'delimitors'
1932 if (itemTagGroup != 0xfffe || testGroup != 0xfffe )
1933 gdcmWarningMacro( "Wrong Item Tag found:"
1934 << " We should have found tag ("
1935 << DictEntry::TranslateToKey(testGroup,testElem) << ")" << std::endl
1936 << " but instead we encountered tag ("
1937 << DictEntry::TranslateToKey(itemTagGroup,itemTagElem) << ")"
1938 << " at address: " << " 0x(" << std::hex
1939 << (unsigned int)positionOnEntry << std::dec << ")"
1941 Fp->seekg(positionOnEntry, std::ios::beg);
1949 * \brief Assuming the internal file pointer \ref Document::Fp
1950 * is placed at the beginning of a tag (TestGroup, TestElement),
1951 * read the length associated to the Tag.
1952 * \warning On success the internal file pointer \ref Document::Fp
1953 * is modified to point after the tag and it's length.
1954 * On failure (i.e. when the tag wasn't the expected tag
1955 * (TestGroup, TestElement) the internal file pointer
1956 * \ref Document::Fp is restored to it's original position.
1957 * @param testGroup The expected Group of the tag.
1958 * @param testElem The expected Element of the tag.
1959 * @return On success returns the length associated to the tag. On failure
1962 uint32_t File::ReadTagLength(uint16_t testGroup, uint16_t testElem)
1965 if ( !ReadTag(testGroup, testElem) )
1967 // Avoid polutting output
1968 if ( testGroup != 0xfffe )
1969 gdcmErrorMacro( "ReadTag did not succeed for ("
1970 << DictEntry::TranslateToKey(testGroup,testElem)
1975 //// Then read the associated Item Length
1977 // long currentPosition = Fp->tellg(); // save time // JPRx
1978 uint32_t itemLength = ReadInt32();
1979 gdcmDebugMacro( "Basic Item Length is: " << itemLength
1980 // << " at address: " << std::hex << (unsigned int)currentPosition
1986 * \brief When parsing the Pixel Data of an encapsulated file, read
1987 * the basic offset table (when present, and BTW dump it).
1989 void File::ReadEncapsulatedBasicOffsetTable()
1991 //// Read the Basic Offset Table Item Tag length...
1992 uint32_t itemLength = ReadTagLength(0xfffe, 0xe000);
1994 // When present, read the basic offset table itself.
1995 // Notes: - since the presence of this basic offset table is optional
1996 // we can't rely on it for the implementation, and we will simply
1997 // trash it's content (when present).
1998 // - still, when present, we could add some further checks on the
1999 // lengths, but we won't bother with such fuses for the time being.
2000 if ( itemLength != 0 )
2002 char *charBasicOffsetTableItemValue = new char[itemLength];
2003 Fp->read(charBasicOffsetTableItemValue, itemLength);
2004 unsigned int nbEntries = itemLength/4;
2005 assert( nbEntries*4 == itemLength); // Make sure this is a multiple
2006 BasicOffsetTableItemValue = new uint32_t[nbEntries];
2008 for (unsigned int i=0; i < nbEntries; i++ )
2010 BasicOffsetTableItemValue[i] = *((uint32_t*)(&charBasicOffsetTableItemValue[4*i]));
2011 #if defined(GDCM_WORDS_BIGENDIAN) || defined(GDCM_FORCE_BIGENDIAN_EMULATION)
2012 uint32_t val = BasicOffsetTableItemValue[i];
2013 BasicOffsetTableItemValue[i]
2014 = ( (val<<24) | ((val<<8) & 0x00ff0000) |
2015 ( (val>>8) & 0x0000ff00) | (val>>24) );
2017 gdcmDebugMacro( "Read one length for: " <<
2018 std::hex << BasicOffsetTableItemValue[i] );
2021 delete[] charBasicOffsetTableItemValue;
2025 // These are the deprecated method that one day should be removed (after the next release)
2027 //#ifndef GDCM_LEGACY_REMOVE
2029 * \ brief Loader. (DEPRECATED : temporaryly kept not to break the API)
2030 * @ param fileName file to be open for parsing
2031 * @ return false if file cannot be open or no swap info was found,
2032 * or no tag was found.
2033 * @deprecated Use the Load() [ + SetLoadMode() ] + SetFileName() functions instead
2036 bool File::Load( std::string const &fileName )
2038 GDCM_LEGACY_REPLACED_BODY(File::Load(std::string), "1.2",
2040 SetFileName( fileName );
2041 if ( ! this->Document::Load( ) )
2044 return DoTheLoadingJob( );
2048 //-----------------------------------------------------------------------------
2051 //-----------------------------------------------------------------------------
2052 } // end namespace gdcm