The principle of ALARA,as low as reasonably achievable,is a protective measure designed to protect both patients and staff.What are the three principles of ALARA?
A) Time, distance, and shielding
B) Dose, rad, and rem
C) Time, dose, and depth
D) Scatter, leakage, and tissue density

Question

Quizplus · Accepted Answer

The three major principles inherent to ALARA are:
1.Time: Minimizing the time of exposure directly reduces radiation dose.Minimizing the time of exposure (also known as "on beam" time)directly reduces radiation dose to the patient as well as the staff exposure to scatter radiation.
2.Distance: The intensity and dose of radiation decreases dramatically as one increases the distance from the source.
3.Shielding: Barriers of lead,or absorber materials such as Plexiglas,concrete,or water provide protection from penetrating radiation.Therefore,inserting the proper shield between the person and a radiation source will greatly reduce or eliminate the dose of radiation.The procedure team ensures the patient is positioned as far from the X-ray tube and as close to the image intensifier as possible.

The Principle of ALARA,as Low as Reasonably Achievable,is a Protective