+int File::GetYSize()
+{
+ DataEntry *entry = GetDataEntry(0x0028,0x0010);
+ if( entry )
+ return (int)entry->GetValue(0);
+
+ if ( IsDicomV3() )
+ {
+ return 0;
+ }
+
+ // The Rows (0028,0010) entry was optional for ACR/NEMA.
+ // (at least some images didn't have it.)
+ // It might hence be a signal (1D image). So we default to 1:
+ return 1;
+}
+
+/**
+ * \brief Retrieve the number of planes of volume or the number
+ * of frames of a multiframe.
+ * \warning When present we consider the "Number of Frames" as the third
+ * dimension. When missing we consider the third dimension as
+ * being the ACR-NEMA "Planes" tag content.
+ * @return The encountered size when found, 1 by default (single image).
+ */
+int File::GetZSize()
+{
+ // Both DicomV3 and ACR/Nema consider the "Number of Frames"
+ // as the third dimension.
+ DataEntry *entry = GetDataEntry(0x0028,0x0008);
+ if( entry )
+ return (int)entry->GetValue(0);
+
+ // We then consider the "Planes" entry as the third dimension
+ entry = GetDataEntry(0x0028,0x0012);
+ if( entry )
+ return (int)entry->GetValue(0);
+ return 1;
+}
+
+/**
+ * \brief gets the info from 0018,1164 : ImagerPixelSpacing
+ * then 0028,0030 : Pixel Spacing
+ * else 1.0
+ * @return X dimension of a pixel
+ */
+float File::GetXSpacing()
+{
+ float xspacing = 1.0;
+ uint32_t nbValue;
+
+ // To follow David Clunie's advice, we first check ImagerPixelSpacing
+
+ DataEntry *entry = GetDataEntry(0x0018,0x1164);
+ if( entry )
+ {
+ nbValue = entry->GetValueCount();
+ // Can't use IsValueCountValid because of the complex heuristic.
+ if( nbValue >= 3 )
+ xspacing = (float)entry->GetValue(2);
+ if( nbValue >= 2 )
+ xspacing = (float)entry->GetValue(1);
+ else
+ xspacing = (float)entry->GetValue(0);
+
+ if ( xspacing == 0.0 )
+ xspacing = 1.0;
+ return xspacing;
+ }
+ else
+ {
+ gdcmWarningMacro( "Unfound Imager Pixel Spacing (0018,1164)" );
+ }
+
+ entry = GetDataEntry(0x0028,0x0030);
+ if( entry )
+ {
+ nbValue = entry->GetValueCount();
+ if( nbValue >= 3 )
+ xspacing = (float)entry->GetValue(2);
+ else if( nbValue >= 2 )
+ xspacing = (float)entry->GetValue(1);
+ else
+ xspacing = (float)entry->GetValue(0);
+
+ if ( xspacing == 0.0 )
+ xspacing = 1.0;
+ return xspacing;
+ }
+ else
+ {
+ gdcmWarningMacro( "Unfound Pixel Spacing (0028,0030)" );
+ }
+
+ return xspacing;
+}
+
+/**
+ * \brief gets the info from 0018,1164 : ImagerPixelSpacing
+ * then from 0028,0030 : Pixel Spacing
+ * else 1.0
+ * @return Y dimension of a pixel
+ */
+float File::GetYSpacing()
+{
+ float yspacing = 1.0;
+ // To follow David Clunie's advice, we first check ImagerPixelSpacing
+
+ DataEntry *entry = GetDataEntry(0x0018,0x1164);
+ if( entry )
+ {
+ yspacing = (float)entry->GetValue(0);
+
+ if ( yspacing == 0.0 )
+ yspacing = 1.0;
+ return yspacing;
+ }
+ else
+ {
+ gdcmWarningMacro( "Unfound Imager Pixel Spacing (0018,1164)" );
+ }
+
+ entry = GetDataEntry(0x0028,0x0030);
+ if( entry )
+ {
+ yspacing = (float)entry->GetValue(0);
+
+ if ( yspacing == 0.0 )
+ yspacing = 1.0;
+ return yspacing;
+ }
+ else
+ {
+ gdcmWarningMacro( "Unfound Pixel Spacing (0028,0030)" );
+ }
+
+ return yspacing;
+}
+
+/**
+ * \brief gets the info from 0018,0088 : Space Between Slices
+ * else from 0018,0050 : Slice Thickness
+ * else 1.0
+ * @return Z dimension of a voxel-to be
+ */
+float File::GetZSpacing()
+{
+ // --->
+ // ---> Warning :
+ // --->
+ // For *Dicom* images, ZSpacing should be calculated using
+ // XOrigin, YOrigin, ZOrigin (of the top left image corner)
+ // of 2 consecutive images, and the Orientation
+ //
+ // Computing ZSpacing on a single image is not really meaningfull !
+
+ float zspacing = 1.0f;
+
+ // Spacing Between Slices : distance between the middle of 2 slices
+ // Slices may be :
+ // jointives (Spacing between Slices = Slice Thickness)
+ // overlapping (Spacing between Slices < Slice Thickness)
+ // disjointes (Spacing between Slices > Slice Thickness)
+ // Slice Thickness : epaisseur de tissus sur laquelle est acquis le signal
+ // It only concerns the MRI guys, not people wanting to visualize volumes
+ // If Spacing Between Slices is missing,
+ // we suppose slices joint together
+ DataEntry *entry = GetDataEntry(0x0018,0x0088);
+ if( entry )
+ {
+ zspacing = (float)entry->GetValue(0);
+
+ if ( zspacing == 0.0 )
+ zspacing = 1.0;
+ return zspacing;
+ }
+ else
+ gdcmWarningMacro("Unfound Spacing Between Slices (0018,0088)");
+
+ // if no 'Spacing Between Slices' is found,
+ // we assume slices join together
+ // (no overlapping, no interslice gap)
+ // if they don't, we're fucked up
+ entry = GetDataEntry(0x0018,0x0050);
+ if( entry )
+ {
+ zspacing = (float)entry->GetValue(0);
+
+ if ( zspacing == 0.0 )
+ zspacing = 1.0;
+ return zspacing;
+ }
+ else
+ gdcmWarningMacro("Unfound Slice Thickness (0018,0050)");
+
+ return zspacing;
+}
+
+/**
+ * \brief gets the info from 0020,0032 : Image Position Patient
+ * else from 0020,0030 : Image Position (RET)
+ * else 0.
+ * @return up-left image corner X position
+ */
+float File::GetXOrigin()
+{
+ DataEntry *entry = GetDataEntry(0x0020,0x0032);
+ if( !entry )
+ {
+ gdcmWarningMacro( "Unfound Image Position Patient (0020,0032)");
+ entry = GetDataEntry(0x0020,0x0030);
+ if( !entry )
+ {
+ gdcmWarningMacro( "Unfound Image Position (RET) (0020,0030)");
+ return 0.0f;
+ }
+ }
+
+ if( entry->GetValueCount() == 3 )
+ {
+ if (!entry->IsValueCountValid() )
+ {
+ gdcmErrorMacro( "Invalid Value Count" );
+ }
+ return (float)entry->GetValue(0);
+ }
+ return 0.0f;
+}
+
+/**
+ * \brief gets the info from 0020,0032 : Image Position Patient
+ * else from 0020,0030 : Image Position (RET)
+ * else 0.
+ * @return up-left image corner Y position
+ */
+float File::GetYOrigin()
+{
+ DataEntry *entry = GetDataEntry(0x0020,0x0032);
+ if( !entry )
+ {
+ gdcmWarningMacro( "Unfound Image Position Patient (0020,0032)");
+ entry = GetDataEntry(0x0020,0x0030);
+ if( !entry )
+ {
+ gdcmWarningMacro( "Unfound Image Position (RET) (0020,0030)");
+ return 0.0f;
+ }
+ }
+
+ if( entry->GetValueCount() == 3 )
+ {
+ if (!entry->IsValueCountValid() )
+ {
+ gdcmErrorMacro( "Invalid Value Count" );
+ }
+ return (float)entry->GetValue(1);
+ }
+ return 0.0f;
+}
+
+/**
+ * \brief gets the info from 0020,0032 : Image Position Patient
+ * else from 0020,0030 : Image Position (RET)
+ * else from 0020,1041 : Slice Location
+ * else from 0020,0050 : Location
+ * else 0.
+ * @return up-left image corner Z position
+ */
+float File::GetZOrigin()
+{
+ DataEntry *entry = GetDataEntry(0x0020,0x0032);
+ if( entry )
+ {
+ if( entry->GetValueCount() == 3 )
+ {
+ if (!entry->IsValueCountValid() )
+ {
+ gdcmErrorMacro( "Invalid Value Count" );
+ }
+ return (float)entry->GetValue(2);
+ }
+ gdcmWarningMacro( "Wrong Image Position Patient (0020,0032)");
+ return 0.0f;
+ }
+
+ entry = GetDataEntry(0x0020,0x0030);
+ if( entry )
+ {
+ if( entry->GetValueCount() == 3 )
+ {
+ if (!entry->IsValueCountValid() )
+ {
+ gdcmErrorMacro( "Invalid Value Count" );
+ }
+ return (float)entry->GetValue(2);
+ }
+ gdcmWarningMacro( "Wrong Image Position (RET) (0020,0030)");
+ return 0.0f;
+ }
+
+ // for *very* old ACR-NEMA images
+ entry = GetDataEntry(0x0020,0x1041);
+ if( entry )
+ {
+ if( entry->GetValueCount() == 1 )
+ {
+ if (!entry->IsValueCountValid() )
+ {
+ gdcmErrorMacro( "Invalid Value Count" );
+ }
+ return (float)entry->GetValue(0); // VM=1 !
+ }
+ gdcmWarningMacro( "Wrong Slice Location (0020,1041)");
+ return 0.0f;
+ }
+
+ entry = GetDataEntry(0x0020,0x0050);
+ if( entry )
+ {
+ if( entry->GetValueCount() == 1 )
+ {
+ if (!entry->IsValueCountValid() )
+ {
+ gdcmErrorMacro( "Invalid Value Count" );
+ }
+ return (float)entry->GetValue(0);
+ }
+ gdcmWarningMacro( "Wrong Location (0020,0050)");
+ return 0.0f;
+ }
+ return 0.; // Hopeless
+}
+
+/**
+ * \brief gets the info from 0020,0037 : Image Orientation Patient
+ * or from 0020 0035 : Image Orientation (RET)
+ * (needed to organize DICOM files based on their x,y,z position)
+ * @param iop adress of the (6)float array to receive values
+ * @return true when one of the tag is found
+ * false when nothing is found
+ */
+bool File::GetImageOrientationPatient( float iop[6] )
+{
+ std::string strImOriPat;
+ //iop is supposed to be float[6]
+ iop[0] = iop[1] = iop[2] = iop[3] = iop[4] = iop[5] = 0.;
+
+ // 0020 0037 DS REL Image Orientation (Patient)
+ if ( (strImOriPat = GetEntryString(0x0020,0x0037)) != GDCM_UNFOUND )
+ {
+ if ( sscanf( strImOriPat.c_str(), "%f \\ %f \\%f \\%f \\%f \\%f ",
+ &iop[0], &iop[1], &iop[2], &iop[3], &iop[4], &iop[5]) != 6 )
+ {
+ gdcmWarningMacro( "Wrong Image Orientation Patient (0020,0037)."
+ << " Less than 6 values were found." );