If a doctor suspects you may have a pulmonary embolism (PE), a CT scan is the gold standard of imaging techniques. This painless scan uses intravenous (IV) contrast, a type of dye, to help the doctor ...

Dear Dr. Roach: Could you please explain in layman terms the difference between an X-ray, CT scan, MRI and PET scan? — C.D.B. Answer: All four of these tests provide images of the body, which your ...

NICE's guideline on acute kidney injury recommends that the risk of AKI should be assessed before offering iodinated contrast agents to adults for emergency or non-emergency imaging, and that ...