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12 <H1>Gdcm News</a></H1>
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18 <A CLASS="anchor" NAME="missing">
19 <B>Missing features</B></A>
21 We know the following are missing; don't loose time looking for them ...<br>
22 We know they could be helpfull. We shall add them some day.<br>
23 Any contribution is welcome.
27 <LI> gdcm doesn't read yet JPEG-LS encoded files.
29 We said 'JPEG-LS', not Lossless Jpeg ...<br>
30 [JPEG-LS is the basis for new lossless/near-lossless compression
31 standard for continuous-tone images intended for JPEG2000.
32 The standard is based on the LOCO-I algorithm
33 (LOw COmplexity LOssless COmpression for Images)
34 developed at Hewlett-Packard Laboratories]
36 <LI> gdcm doesn't read yet all JPEG2000 encoded files.
38 But we are working on it (a lot of troubles with Jasper).
40 <LI> gdcm doesn't read yet MPEG2 encoded files.
42 But we are working on it.
47 <LI> Allow user to tell <TT>gdcm::Document</TT> constructor he just wants
48 to load a given list of <TT>DocEntries</TT>
49 (to save CPU time and RAM space)
50 <LI> Allow 'frame by frame' reading (should be helpfull for huge
52 <LI> Allow subvolume selection / frames selection before reading.
53 <LI> Expose Read/Decompression mechanisms to allow user getting
54 information from <tt>DICOMDIR</TT> <br> -or from his own Data Base-
55 and reading his images without parsing
56 the header, one more time.
60 <LI> Allow user to tell the Writer he doesn't want to write down
61 <TT>SeqEntry</TT> (if any)
62 <LI> Allow user to tell the Writer he doesn't want to write down
63 <TT>Shadow groups</TT> (if any)
64 <LI> Allow user to tell the Writer which compression mode he wants<br>
65 (Right now, no one is available)
66 <LI> Allow user to tell the Writer he wants to split a
67 <TT>Multiframe</TT> image into a serie of
68 <TT>Single frame</TT> images.
69 <LI> Allow user to tell the Writer he wants to agregate a
70 Serie of <TT>Single frame</TT> images into a
71 <TT>Multiframe</TT> image.
75 <LI> Full <TT>Icon Image</TT> management (Read and Write)
76 <LI> Full <TT>Overlays</TT> management (Read and Write) <br>
77 both for '<TT>ACR-NEMA</TT> style' (using groups <TT>0x6000</TT>
78 and nexts) and '<TT>DICOM V3</TT> style' (using Sequences)
80 <LI> <TT>DICOMDIR</TT>
82 <LI> <TT>DICOMDIR</TT> full management (not limited to
83 <TT> PATIENT</TT>/<TT>STUDY</TT>/<TT>SERIE</TT>/<TT>IMAGE</TT>)
84 <LI> Allow user to add an entry (belonging to the file header Dicom
85 entries)to the default entry list, before
86 making a <TT>DICOMDIR</TT> from a root directory
87 <LI> Allow user to add an entry of his owns (for instance an <TT>Icon</TT>
88 to each image, or to each Serie).
93 <LI> An accurate <TT>SerieHelper</TT> <br>
94 Right now <TT>SerieHelper</TT> only works on 'bona fide Series', and
95 breaks on wrongly forged Series.<br>
96 We are still looking for any heuristics...
97 <LI> A <TT>SerieHelper</TT> that would use the <TT>DICOMDIR</TT> (if any)
98 instead of parsing all the files within the Root Directory
102 <LI> 16-bits-LUT full Management
103 <LI> User friendly management of <TT>Rescale Slope</TT> and
104 <TT>Rescale Intercept</TT>
105 <LI> Allow parsing the <TT>Shadow groups</TT> against a user supplied
106 private <TT>Dicom Dictionary</TT> (pfff!...)
109 <!#######################################################################>
110 <HR size="1"><ADDRESS style="align: right;"></ADDRESS>
112 <A CLASS="anchor" NAME="NewsCurrentVersion">
113 <B>Current Version</B></A>
121 <a href="uml-gdcm.pdf">gdcm UML Class Diagram</a> current version.
127 <LI> <TT>AnonymizeNoLoad</TT> used with <TT>dirin=inputDirectoryName</TT>
128 anonymizes all the files within the given Directory.
130 User may also choose extra elements he wants to rub out: <br>
131 <TT>rubout=listOfElementsToRubOut</TT><br>
132 with <tt>listOfElementsToRubOut : group1-elem1,group2-elem2,
133 ...</TT> (in hexa, no space within the list )
135 <LI> <TT>gdcm::SerieHelper()</TT> has a new method
136 <TT>void AddGdcmFile(File *header)</TT>, that allows aware user to
137 create a '<TT>FileList</TT>' (actually a
138 <TT>std::vector< File* > </TT>).<br>
139 The <TT>FileList</TT> created this way will be the
140 'first one' in the <TT>gdcm::FileHelper()</TT> (retrieve it with
141 <TT>FileList *GetFirstCoherentFileList()</TT> ).<br>
142 It may be sorted using <TT>OrderFileList</TT>.<br>
143 No 'coherence check' will be performed on this <TT>FileList</TT>
145 It may be passed to a <TT>vtkGdcmReader</TT>
146 (to avoid parsing twice the files)
148 <LI> <TT>vtkGdcmReader</TT> can now get the result of
149 <TT>gdcm::SerieHelper</TT> (to avoid parsing twice the files)<br>
150 Proceed as follow :<br>
152 gdcmSerieHelper *sh = new gdcmSerieHelper();
153 sh->SetDirectory(myImageDirectory, true);
154 gdcmFileList *l = s->GetFirstCoherentFileList();
157 vtkGdcmReader *gr = new vtkGdcmReader();
158 gr->SetCoherentFileList(l);
161 This works with a directory that contains only one '<TT>Serie</TT>'
162 (same <TT>Serie UID</TT> for all the images).<br>
163 If it contains more than one <TT>Serie</TT>, you'll have to loop
164 on the Series, using <TT>GetNextCoherentFileList()</TT>;<br>
165 It will be up to the user to delete the <TT>gdcm::File</TT>.
167 See <TT>vtkgdcmSerieViewer</TT> for an example.
169 <LI>Both <TT>vtkgdcmViewer</TT> and <TT>vtkgdcmViewer2</TT>
170 are available to allow easy displaying of single/multiframe
171 GreyLevel/RGB/PaletteColor images<br><br>
172 <LI> <TT>DICOMDIR</TT> anonymiser (<TT>Load</TT> and <TT>Noload</TT> mode)
174 <LI> Because the <TT>gdcm::DicomDir::Load()</TT> method may be used
175 either for loading an already made <TT>DICOMDIR</TT> file or for
176 parsing all the dicom files with a given root directory we
177 syntaxically separated the operations: <br>
178 For loading an already made <TT>DICOMDIR</TT> file, use : <br>
180 gdcm::DicomDir *d = new gdcm::DicomDir();
181 d->SetFileName(fileName);
185 For parsing all the dicom files within a given root directory, use :<br>
187 gdcm::DicomDir *d = new gdcm::DicomDir();
188 d->SetDirectoryName(dirName);
192 <b>Don't</b> use any longer old deprecated style: <br>
194 gdcm::DicomDir *d = new gdcm::DicomDir();<br>
195 d->SetParseDir(true); // </TT>or <TT>d->SetParseDir(false);<br>
196 d->Load( fileName );<br>
199 <LI> User is now allowed to tell <TT>gdcm::Document</TT> constructor
200 he doesn't want to deal with <TT>SeqEntry</TT>
201 (every time it's possible) <br> and/or he doesn't
202 want to deal with <TT>Shadow groups</TT> (every time it's
203 possible) <br> or he doesn't
204 want to deal with <TT>SeqEntry</TT> that belong to a <TT>Shadow group</TT> (every time it's
208 gdcm::File *f = new gdcm::File();
209 f->SetLoadMode(NO_SEQ); | depending on what
210 f->SetLoadMode(NO_SHADOW); | you want *not*
211 f->SetLoadMode(NO_SEQ | NO_SHADOW);| to load from the
212 f->SetLoadMode(NO_SHADOWSEQ); | target file
213 f->SetFileName(fileName);
216 <b>Don't</b> use any longer old deprecated style: <br>
218 gdcm::File *f = new gdcm::File(fileName);</TT> <br>
220 <LI> User is now allowed to tell <TT>gdcm::DicomDir</TT> constructor
221 he doesn't want to deal with <TT>SeqEntry</TT>
222 he doesn't want to deal with <TT>SeqEntry</TT>
223 (every time it's possible) <br> and/or he doesn't
224 want to deal with <TT>Shadow groups</TT> (every time it's
225 possible) <br> or he doesn't
226 want to deal with <TT>SeqEntry</TT> that belong to a <TT>Shadow group</TT> (every time it's
227 possible)<br> when he parses all the Dicom files within a given
231 gdcm::DicomDir *f = new gdcm::DicomDir();
232 f->SetLoadMode(NO_SEQ); | depending on what
233 f->SetLoadMode(NO_SHADOW); | you want *not*
234 f->SetLoadMode(NO_SEQ | NO_SHADOW);| to load from the files
235 f->SetLoadMode(NO_SHADOWSEQ); | within the root directory
236 f->SetDirectoryName(rootDirectoryName);
239 <b>Don't</b> use any longer old deprecated style: <br>
241 gdcm::DicomDir *dcmdir = new gdcm::DicomDir(dirName, true);</TT><br>
247 <LI> The difference between <TT>MONOCHROME1</TT> (low values = bright,
248 high values = dark) and <TT>MONOCHROME2</TT> (low values = dark,
249 high values = bright) is now taken into account.<br>
250 It's no longer up to the user to change the pixels value
251 <LI> Writing a 'True Dicom' image after reading an <TT>ACR-NEMA</TT> image
252 does not request any longer from the user to build up
253 'manually' the Meta Elements group (<TT>Ox0002</TT>)
254 <LI> Old '24 Bits' <TT>ACR-NEMA</TT> are now correctly re-written
255 in <TT>DICOM V3</TT> mode.
256 <LI> Element <TT>0x0000</TT> of <TT>Shadow groups</TT> is always forced to be a
257 <TT>ValEntry</TT> and its <TT>VR</TT> is forced to <TT>UL</TT>
261 <LI> A.P.I. breaking modifications (since previous version : <TT>1.0</TT>)
263 <LI> NEVER more API breaking modifications !!!
269 <LI> Use of <TT>Implicit Value Representation</TT> writting mode may
270 causes troubles, when there are some <TT>SQ</TT> belonging to a
271 <TT>Shadow Group</TT>. <br>
272 Better you use <TT>Explicit Value Representation</TT> writting mode ...
279 <!#######################################################################>
280 <HR size="1"><ADDRESS style="align: right;"></ADDRESS>
282 <A CLASS="anchor" NAME="NewsVersion1_0">
283 <B>Version 1.0 (Feb 14 2005)</B></A>
289 <a href="Doc1.0/uml-gdcmV1.0.pdf">gdcm 1.0 UML Class Diagram</a> version.
290 <LI> <a href= "Doc1.0/html.user/index.html">User Documentation"</a>
291 <LI> <a href= "Doc1.0/html.developper/index.html">Developper
293 <LI> Final check of the jpeg sub-library: all 'classical' jpeg
294 compressed Dicom files can be read<br>
295 <LI>All the previously gdcm-breaker images are now readable<br>
296 <LI> A huge number of memory leaks removed
297 <LI> Improvement of write process
301 <LI> A.P.I. breaking modifications (since previous version : <TT>0.6</TT>)
303 <LI> Use of <TT> namespace</TT> : all the methods formerly named
304 <TT>className::gdcmXxx()</TT> are now named <TT>className::Xxx()</TT>
305 <br> End user will have to call them as <TT>gdcm::className::Xxx() </TT>
306 <LI> a <TT>gdcm::Document</TT> is now specialized in :
308 <LI> <TT>gdcm::DicomDir</TT>
309 <LI> <TT>gdcm::File</TT>
311 <LI> a <TT>gdcm::DicomElementSet</TT> is composed of a set of
312 <TT>gdcm::DicomDocEntry</TT>
313 <LI> a <TT>gdcm::DicomDocEntry</TT> can be :
315 <LI> a <TT>gdcm::ContentEntry</TT>, specialized in :
317 <LI> <TT>gdcm::ValEntry</TT>
318 <LI> <TT>gdcm::BinEntry</TT> (no longer a specialization of
319 <TT>gdcm::ValEntry</TT>)
321 <LI> a <TT>gdcm::SeqEntry</TT>
323 <LI> Removal of useless accessors <TT>GetXxxByname</TT>, <TT>SetXxxByname</TT>
324 <LI> Renaming of accessors <TT>GetXxxByNumber</TT>, <TT>SetXxxByNumber</TT>
327 <LI> <TT>GetEntryByNumber
328
329 --> GetEntryValue</TT>
330 <LI> <TT>GetEntryLengthByNumber --> GetEntryLength</TT>
331 <LI> <TT>GetEntryOffsetByNumber --> GetEntryOffset</TT>
332 <LI> <TT>GetEntryVRByNumber
333 --> GetEntryVR</TT>
335 <LI> <TT>GetDocEntryByNumber
336 --> GetDocEntry</TT>
337 <LI> <TT>GetValEntryByNumber
338 --> GetValEntry</TT>
339 <LI> <TT>GetBinEntryByNumber
340 --> GetBinEntry</TT>
341 <LI> <TT>GetSeqEntryByNumber
342 --> GetSeqEntry</TT>
347 <!#######################################################################>
348 <HR size="1"><ADDRESS style="align: right;"></ADDRESS>
350 <A CLASS="anchor" NAME="NewsVersion0_6">
351 <B>Version 0.6 (June 8 2004)</B></A>
354 This version will be used by Insight Tool Kit
355 (<a href="http://www.itk.org">ITK</a> 2.0) at the beginning of 2005.<br>
356 It's not yet packaged ...<br><br>
357 <LI> <a href= "Doc0.6/html.user/index.html">User Documentation"</a>
358 <LI> <a href= "Doc0.6/html.developper/index.html">Developper Documentation"</a>
359 <LI> The new <TT>gdcmDocument</TT> class is a parent class of
360 <TT>gdcmHeader</TT> class and <TT>gdcmDicomDir</TT> class.
361 <LI> Massive modifications in the Class Diagram :
363 <LI> any dicom related file is a <TT>gdcmDocument</TT>
364 <LI> a <TT>gdcmDocument</TT> can be :
366 <LI> a <TT>gdcmHeader</TT>, if it contains pixel data
367 <LI> a <TT>gdcmDicomDir</TT>, if it contains only informations
368 on the files in a given directory
371 <LI> a <TT>gdcmDocument</TT> is_a <TT>gdcmElementSet</TT>,
372 composed of a set of <TT>gdcmEntry</TT> separated into :
374 <LI> <TT>gdcmValEntry</TT><br>
375 a specialization of <TT>gdcmValEntry</TT>, for 'non
376 <TT>std::string</TT> representable' values is
377 <TT>gdcmBinEntry</TT>
378 <LI> <TT>gdcmSeqEntry</TT> (VR = <TT>SQ</TT>, i.e Dicom Sequences)<br>
379 they are dealt as tree-like structures :<br>
380 - a <TT>gdcmSeqEntry</TT> is considered as a set
381 of <TT>gdcmSQItem</TT>,<br>
382 - a <TT>gdcmSQItem</TT> is_a <TT>gdcmElementSet</TT>, composed
383 of <TT>gdcmDocEntries</TT>, recursively <br>
386 <LI> Improvement of the jpeg sub-library: jpeg
387 compressed Dicom files (lossless and lossy)
388 might be read (check-it out)
391 <!#######################################################################>
392 <HR size="1"><ADDRESS style="align: right;"></ADDRESS>
394 <A CLASS="anchor" NAME="NewsVersion0_4">
395 <B>Version 0.4 (February 6 2004)</B></A>
399 <LI> <a href="Doc0.4/uml-gdcmV0.4.pdf">gdcm 0.4 UML Class Diagram</a>.
400 <LI> <a href= "Doc0.4/html.user/index.html">User Documentation"</a>
401 <LI> <a href= "Doc0.4/html.developper/index.html">Developper Documentation </a>
403 <LI> Introduction of a jpeg sub-library: some very simple jpeg-lossy
404 compressed Dicom files might be working (check-it out).
405 <LI> And also, fewer memory leaks, cleaned-up stl usage (should work
406 with gcc-3.x), python disutil installer (see file setup.py)
407 supporting both Swig and vtk wrapping.
408 <LI> Introduction of a RLE (Run-Time Encoding) library
409 <LI> Color images (RGB or Palette Color) are dealt with
410 <LI> Confusing names <TT>gdcmPatient</TT>, <TT>gdcmStudy</TT>,
411 <TT>gdcmSerie</TT>, <TT>gdcmPatient</TT> changed to
412 <TT>gdcmDicomDirPatient</TT>, <TT>gdcmDicomDirStudy</TT>,
413 <TT>gdcmDicomDirSerie</TT>, <TT>gdcmDicomDirPatient</TT>
417 <!#######################################################################>
418 <HR size="1"><ADDRESS style="align: right;"></ADDRESS>
420 <A CLASS="anchor" NAME="NewsVersion0_3">
421 <B>Version 0.3 (July 8 2003)</B></A>
424 <LI> <TT>gdcmFile</TT> class now enables acces to the data
425 i.e. the image[s] content. Previously only parsing of the
426 Dicom header was available through usage of <TT>gdcmHeader</TT>
428 <LI> a <A HREF="http://public.kitware.com/VTK/">VTK</A> plugin
429 of gdcm is now available through the <TT>vtkGdcmReader</TT>
430 vtk class (see it as a vtk wrapper of gdcm), which enables
432 <LI> Loading of a single image,
433 <LI> Loading of a stack of images from multiple Dicom files,
434 <LI> this class is wrapped for vtkPython (by using native vtk
437 <LI> Introduction of a jpeg sub-library: lossless-jpeg
438 compressed Dicom files work.
439 <LI> <TT>vtkgdcmViewer</TT> allows easy displaying of single/multiframe
440 GreyLevel/RGB/PaletteColor images
443 <!#######################################################################>
444 <HR size="1"><ADDRESS style="align: right;"></ADDRESS>
446 <A CLASS="anchor" NAME="NewsVersion0_1">
447 <B>Version 0.1 (April 1 2003)</B></A>
449 <!#######################################################################>
450 <HR size="1"><ADDRESS style="align: right;"></ADDRESS>
452 <A CLASS="anchor" name="NewsVersion0_1">
453 <B>Version 0.0 (March 14 2003)</B></A>
455 <HR size="1"><ADDRESS style="align: right;"></ADRESS>