Spacing order initialized incorrectly when reading SEG

Semantics of pixel spacing is different between DICOM and ITK. In DICOM, "The first value is the row spacing in mm, that is the spacing between the centers of adjacent rows, or vertical spacing" (see here), while in ITK the first value is spacing along the X axis (see here.

In dcmqi, frame size is initialized correctly, with the value of Columns assigned to imageSize[0], but first value of spacing is populated incorrectly from the first value of PixelSpacing:

dcmqi/include/dcmqi/ConverterBase.h

Lines 261 to 262 in 248dc18

    
           pixelMeasures->getPixelSpacing(spacing[0], 0); 
        
           pixelMeasures->getPixelSpacing(spacing[1], 1);

This will result in incorrect segmentation geometry when PixelSpacing is anisotropic.

	pixelMeasures->getPixelSpacing(spacing[0], 0);
	pixelMeasures->getPixelSpacing(spacing[1], 1);