# New extension: RawImageGuess - for loading of images from unrecognized file format

**URL:** <https://discourse.slicer.org/t/new-extension-rawimageguess-for-loading-of-images-from-unrecognized-file-format/9219>\
**Category:** Support\
**Tags:** feature\
**Created:** [November 19, 2019, 5:16pm UTC](https://discourse.slicer.org/t/new-extension-rawimageguess-for-loading-of-images-from-unrecognized-file-format/9219 "2019-11-19T17:16:37Z")\
**Posts on this page:** 1\
**Showing post:** 18

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**Author:** ![Pieter](https://avatars.discourse-cdn.com/v4/letter/p/82dd89/32.png) [@Pieter](https://discourse.slicer.org/u/Pieter)\
**Post date:** [July 14, 2020, 6:36am UTC](https://discourse.slicer.org/t/new-extension-rawimageguess-for-loading-of-images-from-unrecognized-file-format/9219/18 "2020-07-14T06:36:44Z")

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Thank you I will do what you have recommended.

Just for clarity, on the button Display ROI what does it mean (ROI) ?

The X Y Z Spacing means the the size of the model I think, so if the fetus is 31 CM from Cranium to Coccyx then how do I calibrate correctly or at least very close?

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