+ * \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 Retrieve the -unnormalized- number of 'times' of '4D image'.
+ * User has to tell gdcm the location of this '4th Dimension component'
+ * using SetFourthDimensionLocation() method before.
+ * \warning The defaulted value is 1.
+ * @return The encountered size when found, 1 by default
+ * (The file doesn't contain a '4D image'.).
+ */
+int File::GetTSize()
+{
+ if (FourthDimensionLocation == TagKey(0,0) )// 4D location is not set : not a 4D object
+ return 1;
+
+ DataEntry *entry = GetDataEntry(FourthDimensionLocation.GetGroup(),
+ FourthDimensionLocation.GetElement() );
+ if( !entry )
+ {
+ gdcmWarningMacro( " FourthDimensionLocation not found at : " <<
+ std::hex << FourthDimensionLocation.GetGroup()
+ << "|" << FourthDimensionLocation.GetElement());
+ return 1;
+ }
+ else
+ {
+ return (int)entry->GetValue(0);
+ }
+}
+
+/**
+ * \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;
+
+/*
+It *SHOULD* first find the IOD and then deduce which tags to read
+Eg: Cross section this is in Pixel Spacing (0028,0030)
+CR is in Imager Pixel Spacing (0018,1164)
+US is in Pixel Ratio (0028,0034)
+RT is in :
+(3002,0011) Image Plane Pixel Spacing
+(3002,0012) RT Image Position
+and
+(3004,000c) for deducing Z spacing
+*/
+
+
+// std::string SOPClassUID = GetEntryString(0x0008,0x0016);
+
+ /// \todo check the various SOP Class
+ /// to get the Pixel Spacing at the proper location
+
+
+ // Ultrasound Image Storage (Retired)
+/*
+ if (Util::DicomStringEqual( SOPClassUID,"1.2.840.10008.5.1.4.1.1.6")
+ {
+ - check if SOPClassUID contains 2 parts (e.g. "4\3")
+ - guess how to deduce the spacing (FOV ?, ??)
+ }
+ else
+ // go on with old method ...
+*/
+
+ // 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 !=2 )
+ gdcmWarningMacro("ImagerPixelSpacing (0x0018,0x1164) "
+ << "has a wrong number of values :" << nbValue);
+
+ 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 Imager Pixel Spacing (0018,1164)" );
+ }
+
+ entry = GetDataEntry(0x0028,0x0030);
+ if( entry )
+ {
+ nbValue = entry->GetValueCount();
+ if( nbValue !=2 )
+ gdcmWarningMacro("PixelSpacing (0x0018,0x0030) "
+ << "has a wrong number of values :" << nbValue);
+
+ 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