way cheaper than 90%, and way faster than 99%. Radiologists are crazy expensive, at least 50$ per scan. Let's say you use a 1000$ GPU (which you don't need to as these models are usually tiny in practice because of the limited size of medical datasets and because you're not doing hundreds of scans per second.. a CPU is very likely fine). Then.. just 20 scans in you make your money. Let's say the license cost is 5$ per scan. Still make your money very fast.