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21 Cards in this Set

  • Front
  • Back
Which portion of the image receptor system functions to reduce the amount of exposure required to produce an image?
a) Cassette
b)Intensifying screen
c)Film
d)grid
B)Intensifying screen
Which part of an intensifying screen absorbs x-ray energy and emits this energy in the form of light?
a)reflective layer
b)protective coating
c)phosphor layer
d)adhesive layer
c)phosphor layer
What is the purpose of the lead foil layer in the back part of the cassette?
a)To reduc e patient dose from scatter radiation
b_to protect the limited operator dose from scatter radiation
c)to protect the patient and the limited operator from scatter radiation
d)to prevent backscatter from foggin the image
d)
What term is applied to radiation that comes from the cassette back and the cassette tray and is directed toward the film?
a)quantum mottle
b)backscatter
c)fluorescence
d)radiolucence
B
When comparing two intensifying screens of the same phosphor type, the screen with the smaller phsophor crystals:
a)produces greater density with a given amount of exposure
b)produces a radiographic image with more recorded detail
c)requires less mAs to produce a given amount of de3nsity on the image.
d)produces a radiographic image with less recorded detail.
B
The color of light emitted by a screen phosphor is termed:
a)spectral emission
b)chromatography
c)phosphorescence
f_fluorescence
d
screen speed is defined as the:
a)color of light emitted by a screeen
b)ability to emit light when exposed to x-rays
c)optical density minus the base plus fog value
d)efficiency of a screen in converting x-rays to light
d
Which of the following may be caused by poor film/screen contact?
a)image blur
b)lack of radiographic density
c)decreased screen speed.
d)static artifacts
A
How often should a film/screen contact test be performed?
Quarterly
The spectral sensitivity of the film must be matched to the:
a)filmspeed
b)screen speed
c)color of light emitted by the screens
d)screen thickness
c
What is the proper method to store unopened boxes of x-ray film?
Standing on edge
How many times can the phosphor in the CR be used?
10,000 times
The advantages of using CR and DR include
a wide dynamic range and ability to see images very fast
What must be used with digital-based systems to ensure the ALARA concept is practed?
An exposure technique chart
What should be used when imaging body parts that have extreme differences in tissue density?
A compensating filter
What is true regarding the centering of the body part when using digital systems?
The part must be placed in the center of the plate or detector.
What is important to use when using digital systems for mobile radiography?
A grid
What is the primary purpose of studying x-ray darkroom and film processing?
The darkroom and/or film processing can be a source of problems with image quality
What is the purpose of the safelight filter?
the safelight filter only permits the passage of light frequencies to which the x-ray film is least sensitive
Which of the following are possible causes of darkroom fog on radiographs?
a)light-colored walls in the darkroom
b)white light leaks)
excessive developer time
2 and 3 only
If the darkroom safelight test indicates that film may be fogged in the darkroom during routine handling, which of the following is a possible remedy for the problem?
a)replace the safelight bulb with a bulb of lower wattage
b)move the safelight closer to the film handling area
c)remove the safelight filter
d)paint the darkroom walls black
A