# Cranial and caudal directions are opposite when loading sequence of DICOM images

**URL:** <https://discourse.slicer.org/t/cranial-and-caudal-directions-are-opposite-when-loading-sequence-of-dicom-images/17428>\
**Category:** Support\
**Tags:** dicom\
**Created:** [May 4, 2021, 1:43am UTC](https://discourse.slicer.org/t/cranial-and-caudal-directions-are-opposite-when-loading-sequence-of-dicom-images/17428 "2021-05-04T01:43:23Z")\
**Posts on this page:** 1\
**Showing post:** 23

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**Author:** ![pieper](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/pieper/32/8_2.png) [@pieper](https://discourse.slicer.org/u/pieper)\
**Post date:** [May 10, 2021, 12:34pm UTC](https://discourse.slicer.org/t/cranial-and-caudal-directions-are-opposite-when-loading-sequence-of-dicom-images/17428/23 "2021-05-10T12:34:19Z")

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> [@lassoan](#):
>
> Probably merge all subclasses (vtkITKArchetypeDiffusionTensorImageReaderFile, vtkITKArchetypeImageSeriesReader, vtkITKArchetypeImageSeriesScalarReader, vtkITKArchetypeImageSeriesVectorReaderFile, vtkITKArchetypeImageSeriesVectorReaderSeries)

One historical note: a lot of the logic in these classes is split out because all the template instantiations led to memory issue in old compilers.

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