Question 1

After the imaging plate is scanned in the CR reader and the image sent to storage,the phosphor is exposed to a _________ to erase the anatomical image.

Accepted Answer

A)   white light
B)   laser beam
C)   electric current
D)   electric charge A

Question 2

Digital radiographic images are stored,retrieved,sent,and viewed using an extensive image management system called the:

Accepted Answer

A)   Health level-7.
B)   SMPTE.
C)   PACS.
D)   DICOM. C

Question 3

Quantum mottle occurs in digital images if:

Accepted Answer

A)   the time is set too long.
B)   the mA is set too high.
C)   the kVp is set too high.
D)   there are not enough photons reaching the IR. D

Question 4

Which of the following should be checked regularly on the viewing monitor?
1) Viewing surface and air flow
2) Image quality using a test pattern
3) Resolution

Accepted Answer

A)   1 and 2
B)   1 and 3
C)   2 and 3
D)   1, 2, and 3

Question 5

The purpose of the photostimulable phosphor plate is to:

Accepted Answer

A)   remove the images during processing.
B)   erase the images after processing.
C)   store the image of the body part until processed.
D)   serve as the archive for digital images.

Question 6

Which of the following must be used with digital-based x-ray processors to ensure that the ALARA concept is practiced?

Accepted Answer

A)   A grid
B)   A 40-inch SID
C)   An exposure technique chart
D)   Added aluminum at the port of the x-ray tube

Question 7

A minimum of how many sides of the collimated x-ray beam should be shown on the IR and image?

Accepted Answer

A)   One
B)   Two
C)   Three
D)   Four

Question 8

Which of the following matrix sizes will produce the best spatial resolution?

Accepted Answer

A)   500 × 1,000 matrix
B)   1,000 × 1,000 matrix
C)   2,000 × 2,000 matrix
D)   3,000 × 3,000 matrix

Question 9

When splitting a CR cassette in half for two exposures,the half not being exposed should be covered with:

Accepted Answer

A)   lead.
B)   aluminum.
C)   dark paper.
D)   white paper.

Question 10

The storage phosphors in the CR plate are hypersensitive to:

Accepted Answer

A)   small levels of scatter radiation exposure.
B)   large levels of scatter radiation exposure.
C)   low kVp or low mA settings.
D)   incandescent or fluorescent room light.

Question 11

A matrix of 1200 × 1800 will show how many pixels on the viewing monitor?

Accepted Answer

A)   2,160,000
B)   2,800,000
C)   4,160,000
D)   4,1 60,000

Question 12

Which standard ensures that all the different information systems within a given hospital or clinic can communicate effectively?

Accepted Answer

A)   DICOM
B)   Health level-7
C)   ALARA
D)   SMPTE

Question 13

The ability to distinguish anatomical structures of similar subject contrast is termed:

Accepted Answer

A)   quantum mottle.
B)   dynamic range.
C)   contrast resolution.
D)   spatial resolution.

Question 14

What is the weakest link in the digital imaging chain?

Accepted Answer

A)   CR reader
B)   Postprocessing software
C)   Viewing monitor
D)   DICOM server

Question 15

A charge-coupled device (CCD)is used in an indirect conversion DR system to:

Accepted Answer

A)   convert x-rays into a light.
B)   convert light into an electrical signal.
C)   allow readout of the x-ray image.
D)   store the x-ray image.

Question 16

The ability of the digital system to convert the x-ray input electric signal into a useful radiographic image is termed the:

Accepted Answer

A)   dynamic range.
B)   contrast resolution.
C)   signal-to-noise ratio (SNR) .
D)   shuttering.

Question 17

Which of the following is important to use when using digital systems for mobile radiography?

Accepted Answer

A)   Filter
B)   Grid
C)   kVp less than 90
D)   Foam pad under the body part

Question 18

Direct conversion DR processing requires how many steps to process the x-ray image?

Accepted Answer