# DRR generation from Projection matrix

**URL:** <https://discourse.slicer.org/t/drr-generation-from-projection-matrix/42243>\
**Category:** Development\
**Tags:** slicerrt, python\
**Created:** [March 21, 2025, 2:36am UTC](https://discourse.slicer.org/t/drr-generation-from-projection-matrix/42243 "2025-03-21T02:36:29Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![DARSHAN\_K\_N](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/darshan_k_n/32/79243_2.png) [@DARSHAN\_K\_N](https://discourse.slicer.org/u/DARSHAN_K_N)\
**Post date:** [March 21, 2025, 2:36am UTC](https://discourse.slicer.org/t/drr-generation-from-projection-matrix/42243/1 "2025-03-21T02:36:29Z")

</div>

Is it possible to generate the DRR by using the C-arm projection matrix in Plastimatch drr

if it possible

tell me how to use this projection matrix in DRR generation

-4389.749385 702.196627 419.994726 758491.354247 -827.349045 -2805.305642 -3369.076680 -170419.083222 -0.188861 -0.804588 0.563000 805.783505