All of this advice seems really good. The only one I am reluctant to follow is getting a CT or CTA scan. For reference, radiation levels: Chest X-ray: ~0.1 mS

All of this advice seems really good. The only one I am reluctant to follow is getting a CT or CTA scan. For reference, radiation levels: Chest X-ray: ~0.1 mSv (millisieverts) Head CT: ~2 mSv Chest CT: ~7 mSv Abdomen–pelvis CT: ~10 mSv CTA (angiography): often 10–20 mSv Are there non X-ray diagnostic imaging scans that can detect arterial plaque?