Equipment Design

Question 1

Digital radiography systems offer several advantages over computed radiography. Some of these include
1. lower dose.
2. ease of use.
3. immediate imaging results.
4. manipulation of the image.

Answer 1

All of the above

Question 2

During a fluoroscopic examination, a resettable cumulative timing device measures the x-ray beam-on time and sounds an audible alarm or in some cases temporarily interrupts the exposure after the fluoroscope has been activated for what length of time?

Answer 2

5 minutes

Question 3

Fluoroscopic devices are capable of subjecting the patient, the equipment operator, and other personnel near the fluoroscopic equipment to substantial doses of ionizing radiation. These devices include
1. C-arm fluoroscopes.
2. fluoroscopes on stationary equipment with HLC mode used for interventional procedures.
3. biplane interventional fluoroscopic systems.

Answer 3

All of the above

Question 4

If the luminance of the collimator light source is sufficient, the localizing light beam will be able to satisfactorily outline the margins of the radiographic beam on the area of clinical interest on:

Answer 4

Patients of all skin pigmentations

Question 5

In standard image intensification fluoroscopy, an x-ray beam half-value-layer (HVL) of 3 to 4.5 mm aluminum is considered acceptable when kVp ranges from

Answer 5

80 to 100

Question 6

Luminance is determined by measuring the concentration of light:

Answer 6

over a particular field of view

Question 7

The control panel, where technical exposure factors are selected and visually displayed for the equipment operator, must be located

Answer 7

behind a suitable protective barrier that has a radiation-absorbent window that permits observation of the patient during any procedure.

Question 8

What is the purpose of radiographic beam filtration?

Answer 8

To reduce exposure to the patient’s skin and superficial tissues by absorbing most of the lower-energy photons from the heterogeneous beam

Question 9

When using digital fluoroscopy systems, making use of the last image hold feature can

Answer 9

be an effective dose reduction technique.

Question 10

Which of the following materials is commonly used in the tabletop of a radiographic examination table to make the tabletop as radiolucent as possible so that it will absorb only a minimal amount of radiation, thereby reducing the patient’s radiation dose?

Answer 10

Carbon fiber material