# DRR

**URL:** https://discourse.itk.org/t/drr/4637
**Category:** Uncategorized
**Created:** [December 4, 2021, 10:04am UTC](https://discourse.itk.org/t/drr/4637 "2021-12-04T10:04:51Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![wangjun456](https://discourse.itk.org/user_avatar/discourse.itk.org/wangjun456/32/2409_2.png) [@wangjun456](https://discourse.itk.org/u/wangjun456)
#### Post date: [December 4, 2021, 10:04am UTC](https://discourse.itk.org/t/drr/4637/1 "2021-12-04T10:04:51Z")

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I use the example GetDRRSiddonJacobsRayTracing.cxx to generate DRR images. The data in the example can generate DRR images. If I change my own data, I can only generate an all black image. Does anyone know why?