Anatomy vs Physiolog
Ct scans look at the structure of the body, the anatomy, and the way diseases change or distort it.
Pet looks at the physiology, or how the body uses, or metabolizes something. For pet, the most common metabolism pathway looked at is how glucose
is used. A low dose ct is often acquired at the same time as the pet (as in pet/ct scan
), to correlate the pet findings with the ct anatomy.