# PKmodeling: Option for ROI fit

**URL:** <https://discourse.slicer.org/t/pkmodeling-option-for-roi-fit/3660>\
**Category:** Feature requests\
**Tags:** dce\
**Created:** [August 4, 2018, 4:30pm UTC](https://discourse.slicer.org/t/pkmodeling-option-for-roi-fit/3660 "2018-08-04T16:30:22Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![bmb777](https://avatars.discourse-cdn.com/v4/letter/b/eb8c5e/32.png) [@bmb777](https://discourse.slicer.org/u/bmb777)\
**Post date:** [August 4, 2018, 4:30pm UTC](https://discourse.slicer.org/t/pkmodeling-option-for-roi-fit/3660/1 "2018-08-04T16:30:22Z")

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@fedorov I’ve noticed for some tumors that a large number of voxels are not fit making a tumor to tumor comparison difficult (example graph of a poor whole tumor fit attached). I think for some cases where the signal noise may be higher a single ROI fit may provide better results. If possible a option to select voxel by voxel or whole ROI for a fit option would be great.

 ![Example%20Fit](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/a/d/aded0ff6b6686ae7e779a4fa208442b69df6c8d5.png)

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**Author:** ![fedorov](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/fedorov/32/14_2.png) [@fedorov](https://discourse.slicer.org/u/fedorov)\
**Post date:** [August 4, 2018, 10:53pm UTC](https://discourse.slicer.org/t/pkmodeling-option-for-roi-fit/3660/2 "2018-08-04T22:53:28Z")

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I completely agree it would be a very nice feature!

If you are a developer - would you be interested to give it a try? Your contribution would be most welcomed. I can give you pointers. I just don’t have resources to add this feature anytime soon.

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**Author:** ![fedorov](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/fedorov/32/14_2.png) [@fedorov](https://discourse.slicer.org/u/fedorov)\
**Post date:** [August 4, 2018, 10:55pm UTC](https://discourse.slicer.org/t/pkmodeling-option-for-roi-fit/3660/3 "2018-08-04T22:55:08Z")

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For now, I captured your feature suggestion in this issue: [https://github.com/QIICR/PkModeling/issues/7](https://github.com/QIICR/PkModeling/issues/7)

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**Author:** ![bmb777](https://avatars.discourse-cdn.com/v4/letter/b/eb8c5e/32.png) [@bmb777](https://discourse.slicer.org/u/bmb777)\
**Post date:** [August 5, 2018, 11:23pm UTC](https://discourse.slicer.org/t/pkmodeling-option-for-roi-fit/3660/4 "2018-08-05T23:23:18Z")

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Unfortunately, I am not a developer so I don’t think I’d be much help with adding this feature. Thanks for adding the suggestion.