I worked for a medical imaging company last year developing the communication channel for a web portal to allow referring physicians to access study images remotely. The tablet isn't the hurdle, it's the lame network infrastructure and ridiculously slow internet connections. Most the imaging companies have viewers that are nothing more than glorified jpeg viewers. The pain points are accessing the data and how it's stored. Doctors often have extra image studies performed simply because getting the images from previous studies performed at another imaging center is such a hassle.