FREE ABR Therapeutic Medical Physics Questions and Answers

Question 1

Which of the following is the most common method used for external beam radiation therapy?

Accepted Answer

X-ray therapy

Answer

Proton therapy

Answer

Electron beam therapy

Answer

Brachytherapy

Question 2

What is the role of bolus material in radiation therapy?

Accepted Answer

To bring the dose closer to the surface of the skin

Answer

To increase the depth of tumor penetration

Answer

To reduce the dose to surrounding tissues

Answer

To enhance the tumor's radiation sensitivity

Question 3

In radiation therapy, what is the purpose of the dose prescription?

Accepted Answer

To calculate the total radiation dose to be delivered to the tumor

Answer

To determine the optimal angle for radiation delivery

Answer

To estimate the radiation exposure to the patient’s skin

Answer

To measure the leakage radiation from the machine

Question 4

Which of the following is used in intensity-modulated radiation therapy (IMRT) to deliver highly conformal doses to tumors?

Accepted Answer

Multiple beam angles and dynamic leaf motion

Answer

A single fixed beam angle with bolus material

Answer

Intraoperative electron beam therapy

Answer

High-dose rate brachytherapy

Question 5

What is the function of the linear accelerator (linac) in therapeutic radiology?

Accepted Answer

To generate and deliver high-energy x-rays for external radiation therapy

Answer

To implant radioactive sources into tumors

Answer

To measure the absorbed radiation dose in the tumor

Answer

To deliver protons directly to the tumor site