How to draw ROI on MRI images ?

Hi,

I am working on MRI images. My aim is to draw an ROI which are the kidneys on the images. And then I want to calculate the homogeneity, skewness, kurtosis, entropy and correlation.

How to draw an ROI to delimitate the kidneys ?

And how can I calculate homogeneity etc ?

Thnak you

Answer 1

[Rik]

drawpolygon should do the trick. Then createMask will get you a binary mask which you can use for further analyses.

[Johanna THAI]

Thank you very much for your answer.

[Rik]

You're welcome. If this solved your issue, please consider marking it as accepted answer. If not, feel free to comment with your remaining issues.

[Johanna THAI]

Do you know how to calculate homogeneity from the ROI ?

[Rik]

The top result on Google for 'image homogeneity matlab' is this page, which links to the documentation for graycoprops.

That took me 20 seconds. You could save 23 hours waiting on my response by trying Google first. If you don't find anything relevant you can post a comment with what you tried.