Radiology Physics QUIZ

Question 1

An example of electromagnetic radiation is x-rays. Another example of electromagnetic radiation is:

a. Sound waves
b. None of these
c. Heat
d. Visible light

Answer 1

Visible light

Question 2

(Choose all correct answers)
Properties of x-rays include:

• They can go around corners
• They act like a wave traveling through space
• They act like particles when interacting with matter
• They act like both waves and particles
• They can be focused with a lens

Answer 2

• They act like a wave traveling through space
• They act like particles when interacting with matter
• They act like both waves and particles

Question 3

A mechanism for cooling the x-ray tube is

Answer 3

Rotating anode

Question 4

Why should a minimum of two views of the patient be taken with each x-ray study?

Answer 4

To gather most accurate info on 3D patient

Question 5

Which of the following will yield the sharpest image?

a. “Cone down” or collimate the aperture of the x-ray beam
b. Place the thickest part of the patient in the anode side of the x-ray beam
c. Utilize the longest extension cord possible to plug in the x-ray machine
d. Open up the aperture of the x-ray beam

Answer 5

“Cone down” or collimate the aperture of the x-ray beam

Question 6

The rectifier converts

a. Alternating current (AC) to direct current (DC)
b. DC to AC
c. 60 Hz to 100 kHz
d. Techs mistakes to high-quality image

Answer 6

Alternating current (AC) to direct current (DC)

Question 7

Due to the Heel Effect, the thickest area in the field of view should be:

a. On the anode side of the primary beam
b. In the center of the primary beam
c. On the cathode side of the primary beam
d. Parallel to the primary beam

Answer 7

On the cathode side of the primary beam

Question 8

Describe what a grid is and why it is needed in radiology.

What is it?

Why needed?

Answer 8

What? grid is a series of lead strips that absorb scatter radiation, placed between patient and the image receiver (over a cassette or in table)

Why? Scatter radiation increases radiation hazards to technicians and patients. Scatter radiation decreases image quality/sharpness

Question 9

There were four recommendations for the Care of the X-ray Machine discussed in class. Name two.

Answer 9

1. Do not leave the x-ray machine on at all times (turn off when it’s not in use)
2. Don’t run the “ride the rotor” AKA don’t leave the rotor running too long before taking an image