PETs and SPECTs commonly use _______________ materials such as oxygen, fluorine, carbon, and nitrogen.

Question

(1 point)
Responses

radioactively-labeled
radioactively-labeled

noninvasive
noninvasive

naturally-occurring
naturally-occurring

deadly

Answer 1

PETs and SPECTs commonly use radioactively-labeled materials such as oxygen, fluorine, carbon, and nitrogen.