GXMO Radiation Physics and Safety

Question 1

What is the primary purpose of a lead apron in X-ray imaging?

Accepted Answer

To protect patients from unnecessary radiation exposure

Answer

To improve image quality

Answer

To stabilize the X-ray machine

Answer

To enhance the clarity of X-ray films

Question 2

What unit is commonly used to measure radiation dose received by a person?

Accepted Answer

Sieverts

Answer

Hertz

Answer

Joules

Answer

Watts

Question 3

What is the function of a collimator in an X-ray machine?

Accepted Answer

To focus the X-ray beam to the area of interest

Answer

To cool the X-ray tube

Answer

To increase the X-ray tube’s output

Answer

To filter out non-diagnostic X-rays

Question 4

Which of the following is an appropriate measure to reduce radiation exposure to a patient?

Accepted Answer

Employing the ALARA principle

Answer

Increasing the exposure time

Answer

Using the highest possible kVp setting

Answer

Decreasing the distance between the X-ray source and the patient

Question 5

What does the term "half-value layer" (HVL) refer to in radiation physics?

Accepted Answer

The thickness of material needed to reduce the radiation beam by half

Answer

The amount of radiation that reaches the detector

Answer

The maximum radiation dose a patient can receive

Answer

The time required for an X-ray machine to cool down