From what I've seen when I've had CTs (I am not a medical professional and have no direct ties to their industry), the machine sends the images in real time to a technician in another room. Those images are then sent to an offsite service for review by a radiologist, then returned to the doctor to give you the results and they're uploaded to Epic where I can review them online at my leisure.

It's all on a network for a reason. If it's on a network, it has to comply with all regulations that govern the service.