Radiology consists more than viewing images - there is reporting software which is tightly integrated with the image viewing software. This app has none of that integration - it is a viewer only. Besides, where are you gonna put the comparison images? You don’t have enough screen real estate. This app will be used MAYBE for quickly showing patients their exams at the bedside.
Again: NOT ONE radiologist will use this.
This app is for 2 main purposes.
One is consultations. Physician X sends an image to Physician Y across the country and asks for an opinion. This is done all of the time and apps like this just make it easier to do.
The second purpose is for when Patient Z comes in on an emergency basis to see Physician X who is away for 3 days attending a conference. Physician X asks his/her staff to send images ASAP. This is now being done more often in the last year.
Many docs have settled on the iPhone platform, so you seeing a ton of medical apps available across all specialties. Some of the apps are being created by large medical device companies who see the apps as a way to market and sell their imaging systems.