Diagnostic ImagingDifficulty 2/5
Which practice best reflects the ALARA principle during radiography?
- AManually restraining patients so that repeat exposures are avoided
- BUsing sedation and positioning aids so no one remains in the room
- CStanding behind the technician holding the patient during exposure
- DWearing a dosimeter under the lead apron to record true exposure
Show answer and rationale
Correct: B. ALARA means keeping exposure as low as reasonably achievable: sedation and positioning devices remove people from the room entirely. Dosimeters are worn outside the apron at collar level.
- A — Manual restraint places staff in the primary beam area unnecessarily.
- C — Being in the room at all is the exposure that ALARA removes.
- D — A dosimeter under the apron under-reports true exposure.