How to crop the ROI from DDSM database

I have a mammogram image extracted from DDSM database, I want to extract the ROI which is already defined in the image by a red contour. How can I do it?

[Walter Roberson]

Duplicates https://www.mathworks.com/matlabcentral/answers/344258-how-to-crop-the-red-region-in-an-image