Pregnant patient needs X-ray — shielded, justified; safe. Radiation safety: principles (ALARA — as low as reasonably achievable: time — minimize; distance — inverse square; shielding — lead — apron, thyroid), pregnancy (avoid — first trimester — justify — shield — benefit > risk), personnel (TLD badge — monitor — dose limits — 20mSv/year; pregnant worker — 1mSv), patient (justify — CT — highest — alternatives — USG/MRI; pediatric — sensitive — protocols), contrast (allergy — kidney). Justify every exposure — image wisely.