CMD Radiation Safety & Protection

Question 1

What is the maximum permissible dose of radiation for a radiologic technologist in one year?

Accepted Answer

500 millisieverts (mSv)

Answer

For occupational exposure, the annual dose limit for the extremities (hands and feet) and the skin of a radiologic technologist is 500 millisieverts (mSv). This specific limit is set to protect these localized areas that may receive higher doses during certain procedures, distinct from the lower effective whole-body dose limit.

Question 2

Which of the following is a primary method of radiation protection for patients?

Accepted Answer

Using shielding and collimation

Answer

Shielding, such as lead aprons, and collimation, which narrows the radiation beam, are primary methods to protect patients. Shielding blocks radiation from sensitive areas not being imaged, while collimation reduces the volume of tissue exposed, minimizing unnecessary radiation dose.

Question 3

What does the ALARA principle stand for in radiation safety?

Accepted Answer

As Low As Reasonably Achievable

Answer

The ALARA principle is a fundamental concept in radiation protection, emphasizing that all radiation exposures should be kept As Low As Reasonably Achievable. This means making every reasonable effort to reduce radiation doses to patients and personnel, without compromising diagnostic quality or therapeutic effectiveness.

Question 4

Which of the following is considered a secondary barrier in radiation protection?

Accepted Answer

Walls and doors in radiology rooms

Answer

Secondary barriers in radiation protection are designed to attenuate scattered and leakage radiation, rather than the primary beam. Walls and doors in radiology rooms serve this purpose, protecting individuals outside the immediate treatment area from indirect radiation exposure.

Question 5

What is the primary purpose of a dosimeter in radiation safety?

Accepted Answer

To measure radiation dose received by personnel

Answer

A dosimeter is a personal monitoring device designed to detect and measure the amount of ionizing radiation an individual has been exposed to over a period. Its primary function is to track occupational radiation exposure, ensuring that personnel remain within safe dose limits. This measurement is crucial for compliance with regulatory standards and for protecting healthcare workers from potential long-term effects of radiation.

(CMD) Certified Medical Dosimetrist Practice Test

(CMD) Certified Medical Dosimetrist Practice Test

CMD Radiation Safety & Protection