Chapter 11 - Mosby Test Bank

Image-forming x-rays include those which have been _____.

• a. transmitted without interaction

• b. scattered through Compton interaction

• c. absorbed through photoelectric interaction

• d. both A and B

Which kVp selection would result in the most scattered x-rays in the image-forming beam?

• a. 90 kVp

• b. 75 kVp

• c. 60 kVp

• d. 50 kVp

Approximately _____% of the x-ray beam incident on the patient is transmitted through the patient without interaction to become part of the image-forming beam.

• a. 90-99

• b. 80-89

• c. 20-29

• d. 0-9

The x-ray interaction that contributes to the clear parts of the image is _____.

• a. coherent scatter

• b. Compton interaction

• c. photoelectric interaction

• d. pair production

Compton scatter contributes to ____

• a. useful information

• b. image noise

• c. image contrast

• d. all of the above

The three primary factors influencing the intensity of scatter in the image-forming beam are _____.

• a. mAs, kVp, and collimation

• b. mAs, filtration, and grids

• c. kVp, field size, and patient thickness

• d. filtration, patient thickness, and mAs

Decreasing the kVp will increase _____.

• a. patient dose

• b. image noise

• c. Compton scatter

• d. optical density

Photoelectric interactions increase when _____ is decreased

• a. mAs

• b. patient thickness

• c. filtration

• d. kVp

Scatter radiation increases as _____ increases.

• a. photoelectric absorption

• b. field size

• c. filtration

• d. contrast

The x-rays that are transmitted through the patient without interaction contribute to _____.

• a. useful information

• b. film fog

• c. image noise

• d. all of the above