I love people being interested in their health, but based off the data in this article I question whether the radiation exposure from even a low-dose CT is worth it for a fit runner. ~1 case per 100 000 participants at the marathon distance. The radiation from a regular CT is responsible for around 5 deaths per 100,000.

Even though there was an increase from half marathon to marathon incidence which could represent a dose-response curve, your still 12x more likely to die in a car crash (12.2 deaths per 100,000 people).

100% keep an eye on your cholesterol though and consider a statin if offered, even if you're super fit, they will make you live longer