I don't think there is a built in method, but using fread you can open mraw format.
I used this one in the past: Reader class for Photron .mraw-Files - File Exchange - MATLAB Central (mathworks.com)
It re quires some tweaking if you are using newer PFV software that puts header in CHIX file (i have a modified version if needed)
I have not tried this one: Photron MRAW File Reader - File Exchange - MATLAB Central (mathworks.com)
Also if your files are very large, I just recommend saving the frames as separate TIF files. It is easier to backup to the cloud and matlab has builtin method imread (and others) that handles TIF files.
