Radiology – MCQ 17 – Radiation exposure with body imaging

Which one of the following imaging techniques gives maximum radiation exposure to the patient?
A. Chest X-ray
B. MRI
C. CT scan
D. Bone-scan

Correct answer : C. CT scan

Typical effective dose (mSv) for various investigations:

Chest X-ray: 0.02
CT Head: 2.3
CT Chest: 8
CT Abdomen / Pelvis: 10
Bone scan (Tc-99m): 4

Ref: Granger & Allison’s Diagnostic Radiology, 4th Edition, page 238