Hi Jack,
If you are storing the name of the file as a string, you can do something like this:
>>startIndex = sscanf(str, 'Image%d');
(I am assuming that the file name beings with "Image" here)
You could also use "regexp":
>>str='Image10_processed.dcm'
>>expression = '[0-9]';
>>str(startIndex)
Hope this helps!
-Shruti
