DRC Radiation Protection & Compliance 2

Question 1

Which regulatory body sets the occupational dose limit of 50 mSv per year for radiation workers in the US?

Accepted Answer

NRC

Answer

The Nuclear Regulatory Commission (NRC) sets the annual occupational effective dose limit of 50 mSv (5 rem) for radiation workers.

Question 2

What is the recommended ALARA principle in dental radiography?

Accepted Answer

Keep radiation exposure As Low As Reasonably Achievable

Answer

ALARA stands for As Low As Reasonably Achievable and guides practitioners to minimize patient and operator exposure without compromising diagnostic quality.

Question 3

A pregnant dental hygienist's fetal dose limit per gestational period is:

Accepted Answer

1 mSv

Answer

The NCRP recommends a fetal dose equivalent limit of 1 mSv (0.1 rem) during the entire gestational period for occupationally exposed workers.

Question 4

What type of dosimeter measures cumulative radiation exposure over time and is worn by dental personnel?

Accepted Answer

Thermoluminescent dosimeter (TLD)

Answer

Thermoluminescent dosimeters (TLDs) and optically stimulated luminescence (OSL) badges are worn by personnel to monitor cumulative occupational exposure.

Question 5

The primary purpose of a lead apron during dental radiography is to:

Accepted Answer

Protect the patient's radiosensitive organs from primary and scatter radiation

Answer

Lead aprons shield the patient's gonads, bone marrow, and other radiosensitive organs from both primary and scattered radiation during exposures.

(DRC) Dental Radiology Certification for Dental Hygienist Practice Test

(DRC) Dental Radiology Certification for Dental Hygienist Practice Test

DRC Radiation Protection & Compliance 2