CRDR Test 1 Questions with 100% Correct Answers 2024/2025
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Course
CRDR
Institution
CRDR
CRDR Test 1 Questions with 100% Correct Answers 2024/2025
The PSP that is in a CR cassette is a barium fluoride compound that is doped with? - ANSWERSEuropium
The quality of digital image depends on what? - ANSWERSSpatial resolution, brightness, and contrast
What layers of a CR imaging p...
CRDR Test 1 Questions with 100%
Correct Answers 2024/2025
The PSP that is in a CR cassette is a barium fluoride compound that is doped with? - ANSWERSEuropium
The quality of digital image depends on what? - ANSWERSSpatial resolution, brightness, and contrast
What layers of a CR imaging plate absorbs light and reduces scatter? - ANSWERSConductive layer
What system captures the x-ray image, converts to light, then releases an electronic signal? -
ANSWERSIndirect imaging
What is found in detector element of flat panel detector? - ANSWERSCharge collection area, capacitor,
and TFT (1,2&3)
What does CCD stand for? - ANSWERSCharged coupled device
visually dynamic range refers for - ANSWERS# of shades of grey
What refers to adding text to digital image? - ANSWERSAnnotation
What is technical name for computed radiography image plate? - ANSWERSPSP plate
What is the disadvantage of CR? - ANSWERSSpatial resolution (better dynamic range)
When an image is extracted from a FPD the following occurs - ANSWERS(2)data is read by columns and
rows line by line, (1)data is digitized by ADC, (3)histogram is created and analyzed by software
, What is least sensitive to low levels of radiation? - ANSWERSX-ray film
In DR Nyquist is referred to what? - ANSWERSThe sampling frequency of digital data
Edge enhancement can be applied to digital image to improve - ANSWERSthe contrast along the edge of
structures
What is used to reduce patient exposure since CR imaging plates require more exposure than film screen
systems - ANSWERSuse of higher kVp ,increased beam filtration, & use of automatic exposure control
(AEC)
_________ phosphors are randomly suspended in phosphor layer whereas _________ phosphors are
grown into columns - ANSWERSturbid; structured
Contrast resolution is a major advantage of a digital image, what determines high contrast resolution in a
digital image? - ANSWERSHigh exposure, low noise
There are direct and indirect ways of capturing digital image with FPD digital systems arrange the
following they are layered from top to bottom - ANSWERSflorescent layer, photoconductor layer, TFT
layer (2,1,3)
How would dirt in the light guide of a CR reader appear on a digital image? - ANSWERSWhite lines
What is true concerning indirect vs direct digital radiography? - ANSWERSless exposure and less
resolution
What defines spatial resolution in digital imaging - ANSWERSthe measure of amount of detail in an
image
What image plate should be selected to produce an image with the best spatial resolution? -
ANSWERS8x10
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