# The ROI doesn't work in Film Dosimetry

**URL:** <https://discourse.slicer.org/t/the-roi-doesnt-work-in-film-dosimetry/34669>\
**Category:** Support\
**Tags:** slicerrt\
**Created:** [March 3, 2024, 3:19am UTC](https://discourse.slicer.org/t/the-roi-doesnt-work-in-film-dosimetry/34669 "2024-03-03T03:19:02Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Erfan\_Mollai](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/erfan_mollai/32/69531_2.png) [@Erfan\_Mollai](https://discourse.slicer.org/u/Erfan_Mollai)\
**Post date:** [March 3, 2024, 3:19am UTC](https://discourse.slicer.org/t/the-roi-doesnt-work-in-film-dosimetry/34669/1 "2024-03-03T03:19:02Z")

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The ROI key in “perform calibration” in dosimetry analysis didn’t work ☹ what should i do please help me

 ![ROI](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/6/3/635e3137bb1041a71ef7715f772c1d9c8e19f24d.png)

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**Author:** ![cpinter](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/cpinter/32/7995_2.png) [@cpinter](https://discourse.slicer.org/u/cpinter)\
**Post date:** [March 4, 2024, 1:11pm UTC](https://discourse.slicer.org/t/the-roi-doesnt-work-in-film-dosimetry/34669/2 "2024-03-04T13:11:50Z")

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This extension is not maintained for several years now. Probably we should remove it from the Extension Index. Maybe try it with 4.10 stable if you must use it.