# Correcting the Gantry Tilt in CT scans

**URL:** <https://discourse.vtk.org/t/correcting-the-gantry-tilt-in-ct-scans/5526>\
**Category:** Development\
**Created:** [April 9, 2021, 3:34pm UTC](https://discourse.vtk.org/t/correcting-the-gantry-tilt-in-ct-scans/5526 "2021-04-09T15:34:59Z")\
**Posts on this page:** 1\
**Showing post:** 4

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**Author:** ![dgobbi](https://discourse.vtk.org/user_avatar/discourse.vtk.org/dgobbi/32/18_2.png) [@dgobbi](https://discourse.vtk.org/u/dgobbi)\
**Post date:** [April 10, 2021, 2:18pm UTC](https://discourse.vtk.org/t/correcting-the-gantry-tilt-in-ct-scans/5526/4 "2021-04-10T14:18:18Z")

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Yes, that’s definitely not rectified! Can you send the PatientMatrix from the reader? And even better, can you send the ImagePositionPatient and ImageOrientationPatient from at least two of the images?

The rectifier output can be sent directly to the rendering pipeline, no further transformations should be necessary. I’ve tested it on several images.

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