Import Geometry from MATLAB to COMSOL

Hi,

I am new to COMSOL. I have a biological tissue geometry that I got from MRI images into MATLAB. Now I wish to import that geometry from MATLAB into COMSOL to simulate bioheat transfer. I have read up on how to import from COMSOL to MATLAB but not the other way around. I have Comsol V 4.2a. Thanks for all your help!

Best,
Justin