Quality Control Of Imaging Equipment & Accessories

Front 1

To ensure proper operation of the digital image display monitor, all of the following are important in order to develop a quality control (QC) program,except:

Back 1

Disassembly and cleaning of the internal monitor control devices by the QC technologis

Front 2

Europium-activated barium fluorohalide is associated with

Back 2

PSP storage plates

Front 3

The ability of an x-ray unit to produce constant radiation output, at a given mA, using various combinations of mAs and time is called

Back 3

linearity

Front 4

Radiographs from a particular single-phase, full-wave-rectified x-ray unit were overexposed, using known correct exposures. A spinning-top test was performed at 200 mA, 0.05 s, and 70 kVp, and 8 dots were visualized on the finished film. Which of the following is indicated?

Back 4

The 0.05-s time station is inaccurate

Front 5

In digital imaging, artifacts arise from a number of sources, including which of the following

Back 5

1.) Imaging hardware

2.) Image processing software

3.) Operator error artifacts

Front 6

Congruence of the x-ray beam with the light field is tested using

Back 6

radiopaque objects

Front 7

To compensate for variations in gain across a digital receptor, which of the following maintenance steps should be taken?

Back 7

Conduct a calibration correction for image nonuniformity

Front 8

Radiographs from a particular three-phase, full-wave-rectified x-ray unit, made using known correct exposures, were underexposed. A synchronous spinning top test was performed using 200 mA, 1/12 second, and 70 kVp, and a 20° arc is observed on the test film. Which of the following is most likely the problem?

Back 8

The 1/12-second time station is inaccurate.

Front 9

A device used to measure the luminance response and uniformity of monitors used in digital imaging is called a

Back 9

Photometer

Front 10

All of the following are steps that should be used to accomplish quality control (QC) in digital radiography, except:

Back 10

Monitoring patient size to evaluate variations in equipment performance

Front 11

The collimator light and actual irradiated area must be accurate to within what percentage of the SID?

Back 11

2%

Front 12

Environmental background radiation can contribute to a

Back 12

Ghost artifact

Front 13

A three-phase timer can be tested for accuracy using a synchronous spinning top. The resulting image looks like a

Back 13

solid arc, with the angle (in degrees) representative of the exposure time

Front 14

Too much edge enhancement of the image in digital systems can cause an unwanted artifact called the:

Back 14

Halo effect artifact

Front 15

Which of the following is (are) tested as part of a QC program?

Back 15

1.) Beam alignment

2.) Reproducibility

3.) Linearity

Front 16

An exposed image plate will retain its original image quality for about

Back 16

8 hours

Front 17

The x-ray beam and collimator light field must coincide to within

Back 17

2% of the SID

Front 18

All of the following are daily quality control (QC) steps to ensure optimal diagnostic images on a digital display monitor,

Back 18

1.) Turn on the monitor and allow it to warm up

2.) Evaluate luminance, reflection, noise and glare

3.) Make sure that the monitor is dust-free on the viewing surface

Front 19

All of the following are daily quality control (QC) steps to ensure optimal diagnostic images on a digital display monitor, except:

Back 19

Evaluate the QC patterns at the periphery and verify that all letters and numbers appear

Front 20

To determine how quickly an x-ray tube will disperse its accumulated heat, the radiographer uses a(n

Back 20

anode cooling curve

Front 21

Which of the following is (are) correct regarding care of protective leaded apparel?

Back 21

1.) Lead aprons should be fluoroscoped yearly to check for cracks.

2.) Lead gloves should be fluoroscoped yearly to check for cracks.

3.) Lead aprons should be hung on appropriate racks when not in use.

Front 22

A quality-control (QC) program includes checks on which of the following radiographic equipment conditions?

Back 22

1.) Reproducibility

2.) Linearity

3.) Positive beam limitation/automatic collimation

Front 23

device used to test the accuracy of the x-ray timer is the

Back 23

spinning top

Front 24

A test pattern, such as the TG 18-CT test pattern, is used to qualitatively evaluate

Back 24

The luminance response of a digital display monitor