Chapter 12 Digital Radiography-Bushong Test Bank

Chapter 12 Digital Radiography Bushong: Radiologic Science for Technologists




MULTIPLE CHOICE


1. Digital radiography is best described by which three elements?
a. Coupling, receptor, collection
b. Capture, signal, receptor
c. Collection, capture, receptor
d. Capture, coupling, and collection




ANS: D
Digital radiography is best described by the three elements—capture, coupling and
collection.


2. In digital radiography, the visible image results when the is
scanned by a laser beam.
a. storage capacitor
b. thin-film transistor (TFT)
c. photostimulable phosphor (PSP)
d. pixel detector




ANS: C
The latent image is formed on the radiation detector for digital radiography.


3. In digital radiography, the brightness of the image is determined by
. a. pixel values

, b. Hounsfield units
c. automatic brightness control
d. film contrast




ANS: A
In digital radiography, the brightness of the image is determined by pixel values.


4. In CR, the capture element is the .
a. photostimulable phosphor (PSP)
b. thin-film transistor (TFT)
c. charge-coupled device (CCD)
d. scintillation phosphor




ANS: A
In CR, the capture element is the photostimulable phosphor (PSP).


5. Scanned projection radiography was developed as a complement to
. a. plain film radiography
b. computed tomography
c. magnetic resonance imaging
d. nuclear medicine




ANS: B
Scanned projection radiography was developed as a complement to computed
tomography.

, 6. What is the most recent development in digital radiography image receptors?
a. Fanned x-ray beams
b. Linear array radiation detectors
c. Photostimulable phosphors
d. Direct capture solid state devices
ANS: D
Direct capture solid state devices are the most recent development in digital
radiography image receptors.
7. Digital radiography first began to be used in clinical settings in the _. a.
1960s
b. 1970s
c. 1980s
d. 1990s




ANS: C
Digital radiography first began to be used in clinical settings in the 1980s.


8. In digital radiography, spatial resolution is improved with increased
. a. field of view
b. Hounsfield units
c. pixel size
d. matrix size




ANS: D
Spatial resolution is improved with increased matrix size in digital radiography.