Scans create images of body at cellular level

ASK THE DOCTORS

Dear Doctors: My wife is 59 years old.

She had COVID-19 but recovered. A recent chest X-ray shows a white patch on her lung. She doesn’t have a cough or a fever, and her pulmonologist wants her to have a PET scan. What is that? Are PET scans safe?

Dear Reader: A PET scan is a type of imaging test that creates 3D pictures of the interior of the body. The acronym stands for positron emi…