In the CT "super premium" market, the major players focused on different specs and tried to convince hospitals that the future of CT was in this direction (volume/slices/coverage, temporal resolution/cardiac, dose, new imaging/spectral, spatial resolution). Revolution CT is GE's attempt to deliver something that unifies on these goals and they hope to sweep this high end market.
The old CT Scan were difficult to interpret and my son's orthopedic doctor (Dr Dorman, CHOP) could look at the scans for 5 seconds and give a answer verified later after surgery. All other doctors (Say around 10) would look over them for 10+ minutes and not be definitive about anything and tell me to go to Dr Dorman at CHOP.
This is big news for the kids and parents of hard tumor cancers. I am really excited that maybe one more kid doesn't have to go through the torture of our current treatment of hard tumors i.e. bone cancer (osteosarcoma) and other horrible diseases.
I always remember the Star Trek film the Search for Spoke when Bones heals the woman in the elevator and yells at the doctors for the barbaric treat of patients. I am thankful for all the doctors we had.
Cardiac is one of the big growth areas for CT and Revolution is designed to get better temporal resolution. So absolutely angio imaging is a big part of the publicity. AFAIK there's no direct comparison with cath. But if the Revolution CT cardiac dose was better than the competition (I think it may be), chances are the team will update their dose comparisons between GEHC CT and cardiac cath.
Radiation Dose for CT has been a big issue over the past decade. It continues to improve due to better algorithms and hardware changes.
The big features here over GE's other CTs are the fact that it rotates faster and covers more anatomy in a single rotation. Neither of these has a significant impact on the dose. One of the dose oriented features of Revolution is called "ASiR-V" and GE claims that it "is designed to deliver reduced noise levels, improve low-contrast detectability and routinely reduce dose up to 82% for patients of all ages."
How long before something like this ends up in the Gp's office?
As an aside, I think GPs (General Practitioners) are probably phasing out a bit in favor of Physician Assistants and Nurse Practitioners. Though "Family Medicine" still employs lots of MDs.