X-Git-Url: https://git.creatis.insa-lyon.fr/pubgit/?a=blobdiff_plain;f=src%2FgdcmHeader.cxx;h=837db41455e4d60857fcedf3052525291b264979;hb=10aa56aa534bae643e3833474a49309330235196;hp=52e340cb07c129f22a8ef132139279d3a564fbaa;hpb=a4c5c2742a2db55720d4aedec1b2c51a94a19c60;p=gdcm.git diff --git a/src/gdcmHeader.cxx b/src/gdcmHeader.cxx index 52e340cb..837db414 100644 --- a/src/gdcmHeader.cxx +++ b/src/gdcmHeader.cxx @@ -1,4 +1,4 @@ -// gdcmHeader.cxx +// $Header: /cvs/public/gdcm/src/Attic/gdcmHeader.cxx,v 1.69 2003/06/17 17:44:48 jpr Exp $ #include #include @@ -12,6 +12,11 @@ #include #include "gdcmUtil.h" #include "gdcmHeader.h" +using namespace std; + + +// TODO : remove DEBUG +#define DEBUG 0 // Refer to gdcmHeader::CheckSwap() #define HEADER_LENGTH_TO_READ 256 @@ -20,7 +25,8 @@ void gdcmHeader::Initialise(void) { dicom_vr = gdcmGlobal::GetVR(); - Dicts = gdcmGlobal::GetDicts(); + dicom_ts = gdcmGlobal::GetTS(); + Dicts = gdcmGlobal::GetDicts(); RefPubDict = Dicts->GetDefaultPubDict(); RefShaDict = (gdcmDict*)0; } @@ -29,12 +35,18 @@ gdcmHeader::gdcmHeader(const char *InFilename, bool exception_on_error) { SetMaxSizeLoadElementValue(_MaxSizeLoadElementValue_); filename = InFilename; Initialise(); - OpenFile(exception_on_error); + if ( !OpenFile(exception_on_error)) + return; ParseHeader(); LoadElements(); CloseFile(); } +gdcmHeader::gdcmHeader(bool exception_on_error) { + SetMaxSizeLoadElementValue(_MaxSizeLoadElementValue_); + Initialise(); +} + bool gdcmHeader::OpenFile(bool exception_on_error) throw(gdcmFileError) { fp=fopen(filename.c_str(),"rb"); @@ -42,10 +54,9 @@ bool gdcmHeader::OpenFile(bool exception_on_error) if(!fp) throw gdcmFileError("gdcmHeader::gdcmHeader(const char *, bool)"); } - else - dbg.Error(!fp, "gdcmHeader::gdcmHeader cannot open file", filename.c_str()); if ( fp ) return true; + dbg.Verbose(0, "gdcmHeader::gdcmHeader cannot open file", filename.c_str()); return false; } @@ -58,8 +69,8 @@ bool gdcmHeader::CloseFile(void) { } gdcmHeader::~gdcmHeader (void) { - dicom_vr = (gdcmVR*)0; - Dicts = (gdcmDictSet*)0; + dicom_vr = (gdcmVR*)0; + Dicts = (gdcmDictSet*)0; RefPubDict = (gdcmDict*)0; RefShaDict = (gdcmDict*)0; return; @@ -261,6 +272,8 @@ void gdcmHeader::FindVR( gdcmElValue *ElVal) { char VR[3]; string vr; int lgrLue; + char msg[100]; // for sprintf. Sorry + long PositionOnEntry = ftell(fp); // Warning: we believe this is explicit VR (Value Representation) because // we used a heuristic that found "UL" in the first tag. Alas this @@ -317,8 +330,11 @@ void gdcmHeader::FindVR( gdcmElValue *ElVal) { } // We thought this was explicit VR, but we end up with an - // implicit VR tag. Let's backtrack. - dbg.Verbose(1, "gdcmHeader::FindVR:", "Falsely explicit vr file"); + // implicit VR tag. Let's backtrack. + + sprintf(msg,"Falsely explicit vr file (%04x,%04x)\n", ElVal->GetGroup(),ElVal->GetElement()); + dbg.Verbose(1, "gdcmHeader::FindVR: ",msg); + fseek(fp, PositionOnEntry, SEEK_SET); // When this element is known in the dictionary we shall use, e.g. for // the semantics (see the usage of IsAnInteger), the vr proposed by the @@ -420,10 +436,15 @@ bool gdcmHeader::IsJPEGBaseLineProcess1TransferSyntax(void) { return false; } -// faire qq chose d'intelligent a la place de ça - +/** + * \ingroup gdcmHeader + * \brief + * + * @return + */ bool gdcmHeader::IsJPEGLossless(void) { gdcmElValue* Element = PubElValSet.GetElementByNumber(0x0002, 0x0010); + // faire qq chose d'intelligent a la place de ça if ( !Element ) return false; LoadElementValueSafe(Element); @@ -488,6 +509,7 @@ bool gdcmHeader::IsJPEGSpectralSelectionProcess6_8TransferSyntax(void) { return true; return false; } + /** * \ingroup gdcmHeader * \brief Predicate for dicom version 3 file. @@ -512,7 +534,13 @@ void gdcmHeader::FixFoundLength(gdcmElValue * ElVal, guint32 FoundLength) { ElVal->SetLength(FoundLength); } -guint32 gdcmHeader::FindLengthOB(void) { +/** + * \ingroup gdcmHeader + * \brief + * + * @return + */ + guint32 gdcmHeader::FindLengthOB(void) { // See PS 3.5-2001, section A.4 p. 49 on encapsulation of encoded pixel data. guint16 g; guint16 n; @@ -524,50 +552,78 @@ guint32 gdcmHeader::FindLengthOB(void) { while ( ! FoundSequenceDelimiter) { g = ReadInt16(); n = ReadInt16(); + + if (DEBUG) printf ("dans FindLengthOB (%04x,%04x)\n",g,n); + long l = ftell(fp); + if (DEBUG) printf("en %d o(%o) x(%x)\n",l,l,l); + if (errno == 1) return 0; TotalLength += 4; // We even have to decount the group and element - if ( g != 0xfffe ) { - dbg.Verbose(1, "gdcmHeader::FindLengthOB: ", - "wrong group for an item sequence."); + + if ( g != 0xfffe && g!=0xb00c ) /*for bogus headerJPR */ { + char msg[100]; // for sprintf. Sorry + sprintf(msg,"wrong group (%04x) for an item sequence (%04x,%04x)\n",g, g,n); + dbg.Verbose(1, "gdcmHeader::FindLengthOB: ",msg); + long l = ftell(fp); + if (DEBUG) printf("en %d o(%o) x(%x)\n",l,l,l); errno = 1; return 0; } - if ( n == 0xe0dd ) + + if ( n == 0xe0dd || ( g==0xb00c && n==0x0eb6 ) ) /* for bogus header JPR */ FoundSequenceDelimiter = true; - else if ( n != 0xe000) { - dbg.Verbose(1, "gdcmHeader::FindLengthOB: ", - "wrong element for an item sequence."); + else if ( n != 0xe000 ){ + char msg[100]; // for sprintf. Sorry + sprintf(msg,"wrong element (%04x) for an item sequence (%04x,%04x)\n",n, g,n); + dbg.Verbose(1, "gdcmHeader::FindLengthOB: ",msg); + if (DEBUG) printf("wrong element (%04x) for an item sequence (%04x,%04x)\n",n, g,n); errno = 1; return 0; } ItemLength = ReadInt32(); TotalLength += ItemLength + 4; // We add 4 bytes since we just read // the ItemLength with ReadInt32 + + if (DEBUG) printf("TotalLength %d\n",TotalLength); SkipBytes(ItemLength); } fseek(fp, PositionOnEntry, SEEK_SET); return TotalLength; } -void gdcmHeader::FindLength(gdcmElValue * ElVal) { +/** + * \ingroup gdcmHeader + * \brief + * + * @return + */ + void gdcmHeader::FindLength (gdcmElValue * ElVal) { guint16 element = ElVal->GetElement(); + guint16 group = ElVal->GetGroup(); // JPR a virer string vr = ElVal->GetVR(); guint16 length16; + if( (element == 0x0010) && (group == 0x7fe0) ) {// JPR + + dbg.SetDebug(1); + dbg.Verbose(2, "gdcmHeader::FindLength: ", // JPR + "on est sur 7fe0 0010"); + } if ( (filetype == ExplicitVR) && ! ElVal->IsImplicitVr() ) { - if ( (vr=="OB") || (vr=="OW") || (vr=="SQ") || (vr=="UN") ) { + // The following reserved two bytes (see PS 3.5-2001, section // 7.1.2 Data element structure with explicit vr p27) must be // skipped before proceeding on reading the length on 4 bytes. fseek(fp, 2L, SEEK_CUR); + guint32 length32 = ReadInt32(); if ( (vr == "OB") && (length32 == 0xffffffff) ) { ElVal->SetLength(FindLengthOB()); return; } - FixFoundLength(ElVal, length32); + FixFoundLength(ElVal, length32); return; } @@ -601,7 +657,7 @@ void gdcmHeader::FindLength(gdcmElValue * ElVal) { // endian encoding". When this is the case, chances are we have got our // hands on a big endian encoded file: we switch the swap code to // big endian and proceed... - if ( (element == 0x000) && (length16 == 0x0400) ) { + if ( (element == 0x0000) && (length16 == 0x0400) ) { if ( ! IsExplicitVRBigEndianTransferSyntax() ) { dbg.Verbose(0, "gdcmHeader::FindLength", "not explicit VR"); errno = 1; @@ -684,16 +740,34 @@ guint16 gdcmHeader::SwapShort(guint16 a) { return (a); } -void gdcmHeader::SkipBytes(guint32 NBytes) { +/** + * \ingroup gdcmHeader + * \brief + * + * @return + */ + void gdcmHeader::SkipBytes(guint32 NBytes) { //FIXME don't dump the returned value (void)fseek(fp, (long)NBytes, SEEK_CUR); } -void gdcmHeader::SkipElementValue(gdcmElValue * ElVal) { +/** + * \ingroup gdcmHeader + * \brief + * + * @return + */ + void gdcmHeader::SkipElementValue(gdcmElValue * ElVal) { SkipBytes(ElVal->GetLength()); } -void gdcmHeader::SetMaxSizeLoadElementValue(long NewSize) { +/** + * \ingroup gdcmHeader + * \brief + * + * @return + */ + void gdcmHeader::SetMaxSizeLoadElementValue(long NewSize) { if (NewSize < 0) return; if ((guint32)NewSize >= (guint32)0xffffffff) { @@ -712,7 +786,6 @@ void gdcmHeader::SetMaxSizeLoadElementValue(long NewSize) { void gdcmHeader::LoadElementValue(gdcmElValue * ElVal) { size_t item_read; guint16 group = ElVal->GetGroup(); - guint16 elem = ElVal->GetElement(); string vr = ElVal->GetVR(); guint32 length = ElVal->GetLength(); bool SkipLoad = false; @@ -768,37 +841,37 @@ void gdcmHeader::LoadElementValue(gdcmElValue * ElVal) { // on devrait pouvoir faire + compact (?) - if ( IsAnInteger(ElVal) ) { - guint32 NewInt; - ostringstream s; - int nbInt; - if (vr == "US" || vr == "SS") { - nbInt = length / 2; - NewInt = ReadInt16(); - s << NewInt; - if (nbInt > 1) { - for (int i=1; i < nbInt; i++) { - s << '\\'; - NewInt = ReadInt16(); - s << NewInt; - } - } + if ( IsAnInteger(ElVal) ) { + guint32 NewInt; + ostringstream s; + int nbInt; + if (vr == "US" || vr == "SS") { + nbInt = length / 2; + NewInt = ReadInt16(); + s << NewInt; + if (nbInt > 1) { + for (int i=1; i < nbInt; i++) { + s << '\\'; + NewInt = ReadInt16(); + s << NewInt; + } + } - } else if (vr == "UL" || vr == "SL") { - nbInt = length / 4; - NewInt = ReadInt32(); - s << NewInt; - if (nbInt > 1) { - for (int i=1; i < nbInt; i++) { - s << '\\'; - NewInt = ReadInt32(); - s << NewInt; - } - } - } - ElVal->SetValue(s.str()); - return; - } + } else if (vr == "UL" || vr == "SL") { + nbInt = length / 4; + NewInt = ReadInt32(); + s << NewInt; + if (nbInt > 1) { + for (int i=1; i < nbInt; i++) { + s << '\\'; + NewInt = ReadInt32(); + s << NewInt; + } + } + } + ElVal->SetValue(s.str()); + return; + } // We need an additional byte for storing \0 that is not on disk char* NewValue = (char*)malloc(length+1); @@ -833,35 +906,72 @@ void gdcmHeader::LoadElementValueSafe(gdcmElValue * ElVal) { fseek(fp, PositionOnEntry, SEEK_SET); } - +/** + * \ingroup gdcmHeader + * \brief + * + * @return + */ guint16 gdcmHeader::ReadInt16(void) { guint16 g; size_t item_read; item_read = fread (&g, (size_t)2,(size_t)1, fp); - errno = 0; if ( item_read != 1 ) { - dbg.Verbose(1, "gdcmHeader::ReadInt16", " File read error"); + dbg.Verbose(1, "gdcmHeader::ReadInt16", " Failed to read :"); + if(feof(fp)) + dbg.Verbose(1, "gdcmHeader::ReadInt16", " End of File encountered"); + if(ferror(fp)) + dbg.Verbose(1, "gdcmHeader::ReadInt16", " File Error"); errno = 1; return 0; } + errno = 0; g = SwapShort(g); return g; } +/** + * \ingroup gdcmHeader + * \brief + * + * @return + */ guint32 gdcmHeader::ReadInt32(void) { guint32 g; size_t item_read; item_read = fread (&g, (size_t)4,(size_t)1, fp); - errno = 0; if ( item_read != 1 ) { - dbg.Verbose(1, "gdcmHeader::ReadInt32", " File read error"); + + dbg.Verbose(1, "gdcmHeader::ReadInt32", " Failed to read :"); + if(feof(fp)) + dbg.Verbose(1, "gdcmHeader::ReadInt32", " End of File encountered"); + if(ferror(fp)) + dbg.Verbose(1, "gdcmHeader::ReadInt32", " File Error"); errno = 1; return 0; } + errno = 0; g = SwapLong(g); return g; } +/** + * \ingroup gdcmHeader + * \brief + * + * @return + */ + gdcmElValue* gdcmHeader::GetElValueByNumber(guint16 Group, guint16 Elem) { + + gdcmElValue* elValue = PubElValSet.GetElementByNumber(Group, Elem); + if (!elValue) { + dbg.Verbose(1, "gdcmHeader::GetElValueByNumber", + "failed to Locate gdcmElValue"); + return (gdcmElValue*)0; + } + return elValue; +} + /** * \ingroup gdcmHeader * \brief Build a new Element Value from all the low level arguments. @@ -898,7 +1008,6 @@ int gdcmHeader::ReplaceOrCreateByNumber(string Value, guint16 Group, guint16 Ele return(1); } - /** * \ingroup gdcmHeader * \brief Build a new Element Value from all the low level arguments. @@ -933,6 +1042,11 @@ gdcmElValue * gdcmHeader::ReadNextElement(void) { g = ReadInt16(); n = ReadInt16(); + + if ( (g==0x7fe0) && (n==0x0010) ) + if (DEBUG) + printf("in gdcmHeader::ReadNextElement try to read 7fe0 0010 \n"); + if (errno == 1) // We reached the EOF (or an error occured) and header parsing // has to be considered as finished. @@ -941,10 +1055,15 @@ gdcmElValue * gdcmHeader::ReadNextElement(void) { NewElVal = NewElValueByNumber(g, n); FindVR(NewElVal); FindLength(NewElVal); - if (errno == 1) + if (errno == 1) { // Call it quits + if (DEBUG) printf("in gdcmHeader::ReadNextElement : g %04x n %04x errno %d\n",g, n, errno); return (gdcmElValue *)0; - NewElVal->SetOffset(ftell(fp)); + } + NewElVal->SetOffset(ftell(fp)); + if ( (g==0x7fe0) && (n==0x0010) ) + if (DEBUG) + printf("sortie de gdcmHeader::ReadNextElement 7fe0 0010 \n"); return NewElVal; } @@ -968,14 +1087,13 @@ bool gdcmHeader::IsAnInteger(gdcmElValue * ElVal) { if (length == 4) return true; else { - printf("Erroneous Group Length element length (%04x , %04x) : %d\n", + if (DEBUG) printf("Erroneous Group Length element length (%04x , %04x) : %d\n", group, element,length); dbg.Error("gdcmHeader::IsAnInteger", "Erroneous Group Length element length."); } } - if ( (vr == "UL") || (vr == "US") || (vr == "SL") || (vr == "SS") ) return true; @@ -1007,6 +1125,7 @@ size_t gdcmHeader::GetPixelOffset(void) { numPixel = 0x1010; else numPixel = 0x0010; + gdcmElValue* PixelElement = PubElValSet.GetElementByNumber(grPixel, numPixel); if (PixelElement) @@ -1291,7 +1410,11 @@ string gdcmHeader::GetElValRepByName(string TagName) { */ int gdcmHeader::SetPubElValByNumber(string content, guint16 group, guint16 element) + +//TODO : homogeneiser les noms : SetPubElValByNumber qui appelle PubElValSet.SetElValueByNumber +// pourquoi pas SetPubElValueByNumber ?? { + return ( PubElValSet.SetElValueByNumber (content, group, element) ); } @@ -1364,6 +1487,20 @@ void gdcmHeader::ParseHeader(bool exception_on_error) throw(gdcmFormatError) { } } + +// +// TODO : JPR +// des que les element values sont chargees, stocker, +// en une seule fois, dans des entiers +// NX, NY, NZ, Bits allocated, Bits Stored, High Bit, Samples Per Pixel +// (TODO : preciser les autres) +// et refaire ceux des accesseurs qui renvoient les entiers correspondants +// +// --> peut etre dangereux ? +// si l'utilisateur modifie 'manuellement' l'un des paramètres +// l'entier de sera pas modifié ... +// (pb de la mise à jour en cas de redondance :-( + /** * \ingroup gdcmHeader * \brief Retrieve the number of columns of image. @@ -1423,18 +1560,65 @@ int gdcmHeader::GetZSize(void) { return 1; } + +/** + * \ingroup gdcmHeader + * \brief Retrieve the number of Bits Stored + * (as opposite to number of Bits Allocated) + * + * @return The encountered number of Bits Stored, 0 by default. + */ +int gdcmHeader::GetBitsStored(void) { + string StrSize = GetPubElValByNumber(0x0028,0x0101); + if (StrSize == "gdcm::Unfound") + return 1; + return atoi(StrSize.c_str()); +} + + +/** + * \ingroup gdcmHeader + * \brief Retrieve the number of Samples Per Pixel + * (1 : gray level, 3 : RGB) + * + * @return The encountered number of Samples Per Pixel, 1 by default. + */ +int gdcmHeader::GetSamplesPerPixel(void) { + string StrSize = GetPubElValByNumber(0x0028,0x0002); + if (StrSize == "gdcm::Unfound") + return 1; // Well, it's supposed to be mandatory ... + return atoi(StrSize.c_str()); +} +/** + * \ingroup gdcmHeader + * \brief Return the size (in bytes) of a single pixel of data. + * @return The size in bytes of a single pixel of data. + * + */ +int gdcmHeader::GetPixelSize(void) { + string PixelType = GetPixelType(); + if (PixelType == "8U" || PixelType == "8S") + return 1; + if (PixelType == "16U" || PixelType == "16S") + return 2; + if (PixelType == "32U" || PixelType == "32S") + return 4; + dbg.Verbose(0, "gdcmHeader::GetPixelSize: Unknown pixel type"); + return 0; +} + /** * \ingroup gdcmHeader * \brief Build the Pixel Type of the image. * Possible values are: - * - U8 unsigned 8 bit, - * - S8 signed 8 bit, - * - U16 unsigned 16 bit, - * - S16 signed 16 bit, - * - U32 unsigned 32 bit, - * - S32 signed 32 bit, + * - 8U unsigned 8 bit, + * - 8S signed 8 bit, + * - 16U unsigned 16 bit, + * - 16S signed 16 bit, + * - 32U unsigned 32 bit, + * - 32S signed 32 bit, * \warning 12 bit images appear as 16 bit. - * @return + * @return */ string gdcmHeader::GetPixelType(void) { string BitsAlloc; @@ -1460,6 +1644,7 @@ string gdcmHeader::GetPixelType(void) { return( BitsAlloc + Signed); } + /** * \ingroup gdcmHeader * \brief This predicate, based on hopefully reasonnable heuristics, @@ -1474,13 +1659,13 @@ bool gdcmHeader::IsReadable(void) { && atoi(GetElValByName("Image Dimensions").c_str()) > 4 ) { return false; } - if ( GetElValByName("Bits Allocated") == "gdcm::Unfound" ) + if ( GetElValByName("Bits Allocated") == "gdcm::Unfound" ) return false; - if ( GetElValByName("Bits Stored") == "gdcm::Unfound" ) + if ( GetElValByName("Bits Stored") == "gdcm::Unfound" ) return false; - if ( GetElValByName("High Bit") == "gdcm::Unfound" ) + if ( GetElValByName("High Bit") == "gdcm::Unfound" ) return false; - if ( GetElValByName("Pixel Representation") == "gdcm::Unfound" ) + if ( GetElValByName("Pixel Representation") == "gdcm::Unfound" ) return false; return true; } @@ -1512,7 +1697,6 @@ gdcmElValue* gdcmHeader::NewManualElValToPubDict(string NewTagName, string VR) { NewElVal = new gdcmElValue(NewEntry); PubElValSet.Add(NewElVal); return NewElVal; - } /** @@ -1525,17 +1709,229 @@ void gdcmHeader::LoadElements(void) { TagElValueHT ht = PubElValSet.GetTagHt(); for (TagElValueHT::iterator tag = ht.begin(); tag != ht.end(); ++tag) { LoadElementValue(tag->second); - } + } } -void gdcmHeader::PrintPubElVal(ostream & os) { +/** + * \ingroup gdcmHeader + * \brief + * @return + */ +void gdcmHeader::PrintPubElVal(std::ostream & os) { PubElValSet.Print(os); } -void gdcmHeader::PrintPubDict(ostream & os) { +/** + * \ingroup gdcmHeader + * \brief + * @return + */ +void gdcmHeader::PrintPubDict(std::ostream & os) { RefPubDict->Print(os); } +/** + * \ingroup gdcmHeader + * \brief + * @return + */ + int gdcmHeader::Write(FILE * fp, FileType type) { return PubElValSet.Write(fp, type); } + +/** + * \ingroup gdcmHeader + * \brief + * @return + */ +float gdcmHeader::GetXSpacing(void) { + float xspacing, yspacing; + string StrSpacing = GetPubElValByNumber(0x0028,0x0030); + + if (StrSpacing == "gdcm::Unfound") { + dbg.Verbose(0, "gdcmHeader::GetXSpacing: unfound Pixel Spacing"); + return 1.; + } + if( sscanf( StrSpacing.c_str(), "%f\\%f", &xspacing, &yspacing) != 2) + return 0.; + //else + return xspacing; +} + +/** + * \ingroup gdcmHeader + * \brief + * @return + */ +float gdcmHeader::GetYSpacing(void) { + float xspacing, yspacing; + string StrSpacing = GetPubElValByNumber(0x0028,0x0030); + + if (StrSpacing == "gdcm::Unfound") { + dbg.Verbose(0, "gdcmHeader::GetYSpacing: unfound Pixel Spacing"); + return 1.; + } + + if( sscanf( StrSpacing.c_str(), "%f\\%f", &xspacing, &yspacing) != 2) + return 0.; + + if (yspacing == 0.) + { + dbg.Verbose(0, "gdcmHeader::GetYSpacing: gdcmData/CT-MONO2-8-abdo.dcm problem"); + // seems to be a bug in the header ... + sscanf( StrSpacing.c_str(), "%f\\0\\%f", &xspacing, &yspacing); + } + return yspacing; +} + + +/** + * \ingroup gdcmHeader + * \brief + * @return + */ +float gdcmHeader::GetZSpacing(void) { + // TODO : translate into English + // Spacing Between Slices : distance entre le milieu de chaque coupe + // Les coupes peuvent etre : + // jointives (Spacing between Slices = Slice Thickness) + // chevauchantes (Spacing between Slices < Slice Thickness) + // disjointes (Spacing between Slices > Slice Thickness) + // Slice Thickness : epaisseur de tissus sur laquelle est acquis le signal + // ca interesse le physicien de l'IRM, pas le visualisateur de volumes ... + // Si le Spacing Between Slices est absent, + // on suppose que les coupes sont jointives + + string StrSpacingBSlices = GetPubElValByNumber(0x0018,0x0088); + + if (StrSpacingBSlices == "gdcm::Unfound") { + dbg.Verbose(0, "gdcmHeader::GetZSpacing: unfound StrSpacingBSlices"); + string StrSliceThickness = GetPubElValByNumber(0x0018,0x0050); + if (StrSliceThickness == "gdcm::Unfound") + return 1.; + else + return atof(StrSliceThickness.c_str()); + } else { + return atof(StrSpacingBSlices.c_str()); + } +} + +// +// Image Position Patient : +// If not found (AVR-NEMA), we consider Slice Location (20,1041) +// or Location (20,50) as the Z coordinate, +// 0. for all the coordinates if Slice Location not found +// TODO : find a way to inform the caller nothing was found +// TODO : How to tell the caller a wrong number of values was found? +/** + * \ingroup gdcmHeader + * \brief + * @return + */ +float gdcmHeader::GetXImagePosition(void) { + float xImPos, yImPos, zImPos; + // 0020,0032 : Image Position Patient + // 0020,1041 : Slice Location + string StrImPos = GetPubElValByNumber(0x0020,0x0032); + + if (StrImPos == "gdcm::Unfound") { + dbg.Verbose(0, "gdcmHeader::GetXImagePosition: unfound Image Position Patient"); + string StrSliceLoc = GetPubElValByNumber(0x0020,0x1041); + if (StrSliceLoc == "gdcm::Unfound") { + dbg.Verbose(0, "gdcmHeader::GetXImagePosition: unfound Slice Location"); + // How to tell the caller nothing was found? + } + return 0.; + } + if( sscanf( StrImPos.c_str(), "%f\\%f\\%f", &xImPos, &yImPos, &zImPos) != 3) + // How to tell the caller a wrong number of values was found? + return 0.; + //else + return xImPos; +} + +/** + * \ingroup gdcmHeader + * \brief + * @return + */ +float gdcmHeader::GetYImagePosition(void) { + float xImPos, yImPos, zImPos; + // 0020,0032 : Image Position Patient + // 0020,1041 : Slice Location + // 0020,0050 : Location + string StrImPos = GetPubElValByNumber(0x0020,0x0032); + + if (StrImPos == "gdcm::Unfound") { + dbg.Verbose(0, "gdcmHeader::GetYImagePosition: unfound Image Position Patient"); + string StrSliceLoc = GetPubElValByNumber(0x0020,0x1041); + if (StrSliceLoc == "gdcm::Unfound") { + dbg.Verbose(0, "gdcmHeader::GetYImagePosition: unfound Slice Location"); + // How to tell the caller nothing was found? + string StrLocation = GetPubElValByNumber(0x0020,0x0050); + if (StrSliceLoc == "gdcm::Unfound") { + dbg.Verbose(0, "gdcmHeader::GetYImagePosition: unfound Slice Location"); + } + } + return 0.; + } + if( sscanf( StrImPos.c_str(), "%f\\%f\\%f", &xImPos, &yImPos, &zImPos) != 3) + // How to tell the caller a wrong number of values was found? + return 0.; + //else + return yImPos; +} + +/** + * \ingroup gdcmHeader + * \brief + * @return + */ +float gdcmHeader::GetZImagePosition(void) { + float xImPos, yImPos, zImPos; + // 0020,0032 : Image Position Patient + // 0020,1041 : Slice Location + // 0020,0050 : Location + + // TODO : How to tell the caller nothing was found? + // TODO : How to tell the caller a wrong number of values was found? + + string StrImPos = GetPubElValByNumber(0x0020,0x0032); + if (StrImPos != "gdcm::Unfound") { + if( sscanf( StrImPos.c_str(), "%f\\%f\\%f", &xImPos, &yImPos, &zImPos) != 3) { + dbg.Verbose(0, "gdcmHeader::GetZImagePosition: wrong Image Position Patient"); + return 0.; // bug in the element 0x0020,0x0032 + } else { + return zImPos; + } + } + dbg.Verbose(0, "gdcmHeader::GetYImagePosition: unfound Image Position Patient"); + + string StrSliceLocation = GetPubElValByNumber(0x0020,0x1041); + if (StrSliceLocation != "gdcm::Unfound") { + if( sscanf( StrSliceLocation.c_str(), "%f", &zImPos) !=1) { + dbg.Verbose(0, "gdcmHeader::GetZImagePosition: wrong Slice Location"); + return 0.; // bug in the element 0x0020,0x1041 + } else { + return zImPos; + } + } + dbg.Verbose(0, "gdcmHeader::GetYImagePosition: unfound Slice Location"); + + string StrLocation = GetPubElValByNumber(0x0020,0x0050); + if (StrLocation != "gdcm::Unfound") { + if( sscanf( StrLocation.c_str(), "%f", &zImPos) !=1) { + dbg.Verbose(0, "gdcmHeader::GetZImagePosition: wrong Location"); + return 0.; // bug in the element 0x0020,0x0050 + } else { + return zImPos; + } + } + dbg.Verbose(0, "gdcmHeader::GetYImagePosition: unfound Slice Location"); + + return 0.; // Hopeless +} + + +