The PSP cassette is backed by aluminum that:
a. reflects x-rays.
b. absorbs backscatter x-rays.
c. captures the image.
d. transmits x-rays
absorbs backscatter x-rays.
Which one of the following serves to protect against static build-up, dust collection, and mechanical damage to the imaging plate?
a. Aluminum backing
b. Lightweight plastic
c. Felt material
d. Cassette front
Felt material
The layer of the imaging plate that traps electrons during exposure is the ______ layer.
a. protective
b. reflective
c. active
d. support
active
The imaging plate layer that absorbs stimulating light and reflects emitted light is the ______ layer.
a. active
b. color
c. reflective
d. backing
color
The reflective layer:
a. absorbs and reduces static.
b. gives the imaging sheet strength.
c. protects the back of the cassette.
d. sends light in a forward direction.
sends light in a forward direction.
The purpose of the barcode label is to match the image information with the:
a. imaging plate.
b. patient identifier.
c. technologist.
d. radiographic room
patient identifier.
The phosphor layer is made of phosphors from the ______ family.
a. barium sulfate
b. halide calcium
c. barium fluorohalide
d. calcium fluorohalide
barium fluorohalide
When the imaging plate is irradiated, stimulated electrons enter the ______ layer.
a. active
b. conductive
c. protective
d. support
active
During laser beam formation, both ends of the laser reflect energy back and forth so that the atoms:
a. absorb each other.
b. bombard each other.
c. lose energy.
d. create x-ray energy
bombard each other
Coherent light is formed by the laser because the photons:
a. are at right angles to each other.
b. travel in all directions.
c. travel in the same direction.
d. are at varying frequencies
travel in the same direction.
The optical mirror in the reader:
a. directs the laser beam to the imaging plate surface.
b. forms the laser beam into a circle.
c. causes the laser beam to diverge.
d. creates the laser beam.
directs the laser beam to the imaging plate surface
Typical cassette throughput is _____ cassettes per _____.
a. 5; minute
b. 25; minute
c. 25; hour
d. 50; hour
50; hour
Each light photon is assigned a number during:
a. amplification.
b. sampling.
c. digitization.
d. laser scanning
digitization.
The wavelength of the PSP reader laser is ______ nm.
a. 336
b. 636
c. 633
d. 366
633
The laser scans the imaging plate in a ______ pattern.
a. raster
b. horizontal
c. circular
d. random
raster
The process of scanning the moving imaging plate is known as:
a. transition.
b. raster scanning.
c. digitization.
d. translation
translation
Which of the following does not determine PSP resolution?
a. Phosphor layer thickness
b. Pixel size
c. The number of pixels
d. Laser scan speed
Laser scan speed
PSP imaging plates are erased by flooding the plate with:
a. light.
b. radiation.
c. electrons.
d. phosphors
light.
The amount of detail present in any image is known as ______ resolution.
a. contrast
b. density
c. spatial
d. optical
spatial
The selection of the incorrect body part from the examination menu may result in:
a. no image.
b. image misinterpretation.
c. proper density and contrast.
d. no difference in image sharpness
image misinterpretation.
Kilovoltage peak (kVp) should be chosen:
a. to provide the least contrast possible.
b. to provide penetration.
c. for the type and amount of contrast desired.
d. for the type of imaging plate phosphor.
to provide penetration.
The k-edge of phosphor imaging plates ranges from ______ keV.
a. 10 to 30
b. 20 to 40
c. 30 to 50
d. 40 to 60
30 to 50
The range of kVp that can be used with PSP systems is:
a. 45 to 120.
b. 55 to 130.
c. 65 to 120.
d. 75 to 130
45 to 120.
Milliampere-seconds (mA-s) is selected for the:
a. shortest time possible.
b. longest time possible.
c. number of electrons needed.
d. amount of penetration needed.
number of electrons needed.
When insufficient light is produced by the imaging plate phosphor, the image will:
a. not be formed.
b. be grainy.
c. be dark.
d. be detailed
be grainy.
Quantum mottle is caused by:
a. excessive mA-s.
b. excessive kVp.
c. insufficient distance.
d. insufficient light
insufficient light
Which of the following should be considered when selecting the PSP cassette?
a. size and speed.
b. type and speed.
c. size and type.
d. none of these
size and type.
Using an FOV that is much larger than the part being examined will:
a. increase resolution.
b. decrease the size of the matrix.
c. decrease the sampling rate.
d. decrease resolution.
decrease resolution.
The higher the number of pixels in a matrix, the:
a. higher the image resolution.
b. lower the image resolution.
c. lack of effect on image resolution.
d. smaller the image
higher the image resolution.
Grid use for PSP examinations is more critical than in film/screen radiography because CR:
a. examinations produce more scatter.
b. imaging plates record more densities.
c. imaging plates record less scatter.
d. examinations requires much higher kVp values
imaging plates record more densities.
The number of grid lines per centimeter or lines per inch describes grid:
a. frequency.
b. ration.
c. focus.
d. size
frequency.
Grid ratio describes the:
a. number of grid lines per centimeter or lines per inch.
b. angling of the lead strips to coincide with x-ray beam diversion
c. relationship between the height of the lead strips to the interspace.
d. physical size of the grid to be used for each distance measured.
relationship between the height of the lead strips to the interspace.
Which of the following require more critical beam centering?
a. Parallel grids
b. Focused grids
c. Low-ration grids
d. Low-frequency grids
Focused grids
Collimation to a smaller area:
a. increases scatter.
b. increases amount of tissue irradiated.
c. decreases resolution.
d. decreases Compton interactions.
decreases Compton interactions.
Shuttering is a postexposure image manipulation technique that:
a. is placed on the patient.
b. is placed on the cassette.
c. is added to the screen image.
d. changes the amount of scatter
is added to the screen image.
A technologist can lend credibility to his or her expertise by:
a. using a grid.
b. using personal position markers.
c. using less collimation.
d. none of the above
using personal position markers.
The exposure indicator number is:
a. an accurate measure of the patient dose.
b. an indication of radiation absorbed by the imaging plate.
c. both a and b.
d. neither a nor b
an indication of radiation absorbed by the imaging plate.
Cracks in the imaging plate can be caused by:
a. excessive kVp.
b. removing and replacing the plate in the reader.
c. improper erasure.
d. scatter through the back of the cassette
removing and replacing the plate in the reader.
Intermittent extraneous line patterns are _____ artifacts.
a. imaging plate
b. plate reader
c. image processing
d. printer
plate reader
PSP phosphor speed and radiographic film speed are always equivalent
False
The PSP imaging plate does not require periodic erasure because of its ability to record background radiation
False
Less kVp is needed with conventional radiographic screens than is necessary for PSP systems.
False
Grid lines projected onto the imaging plate will not interfere with the image
False
It is acceptable to replace collimation with shuttering.
False
Images should be marked only with computerized markers.
False