CRDR PRELIM Exam Questions & Answers 2024/2025
Computed radiography (CR) - ANSWERSis similar to that obtained with conventional radiography,
T - ANSWERSUse of CR can reduce the time it takes to see the image. T/F
T - ANSWERSRetaking radiographs is common in film-screen radiography. Patie...
Computed radiography (CR) - ANSWERSis similar to that obtained with conventional radiography,
T - ANSWERSUse of CR can reduce the time it takes to see the image. T/F
T - ANSWERSRetaking radiographs is common in film-screen radiography. Patient motion, improper
exposure, and positioning problems all contribute to the need to retake a radiograph. At the
least, these retakes require additional use of the RTs time.
T/F
Photostimulable Luminescence - ANSWERS(PSL) TERM:
photostimulable phosphor - ANSWERS(PSP) TERM:
Photostimulable Luminescence (PSL) - ANSWERSis the release of stored energy within a phosphor by
stimulation with visible light, to produce a luminescent signal
Imaging Plate - ANSWERSIn PSP systems, the radiographic image is recorded on a thin sheet of plastic
known as the _________________
Protective layer - ANSWERSThis is a very thin, tough, clear plastic that protects the phosphor
layer.
Phosphor layer (or active layer). - ANSWERSThis is a layer of photostimulable phosphor that
"traps" electrons during exposure. It is usually made of phosphors
from the barium fluorohalide family (e.g., barium fluorohalide,
, chlorohalide, or bromohalide crystals).
PHOSPHOR LAYER - ANSWERSThis layer may also contain
a dye that differentially absorbs the stimulating light to prevent as
much spread as possible and functions much the same as dye added
to conventional radiographic screens.
Reflective layer. - ANSWERSThis is a layer that sends light in a forward direction when released in
the cassette reader.
REFLECTIVE LAYER - ANSWERSThis layer may be black to reduce the spread of
stimulating light and the escape of emitted light. Some detail is lost
in this process.
Conductive layer. - ANSWERSThis is a layer of material that absorbs and reduces static electricity.
COLOR LAYER - ANSWERSNewer plates may contain a color layer, located between the active layer
and the support, that absorbs the stimulating light but reflects
emitted light.
• Support layer. - ANSWERSThis is a semi-rigid material that gives the imaging sheet some strength.
Backing layer. - ANSWERSThis is a soft polymer that protects the back of the cassette.
Cassette-based PSP systems - ANSWERScontain a window with a barcode label or barcode sticker on the
cassette that allows the technologist to match the image information with the patient-identifying
barcode on the examination request.
EXPOSE - ANSWERSThe first of a sequence of
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