CRDR Diagnostic Exam Questions & Answers 2024/2025
Replaces film in the casette. CR - ANSWERSPSP- Photo Stimulable Phosphor
This is captured directly on a transistor and sent directly to a monitor. - ANSWERSDR
• uses a transistor receiver (like bucky)
• that captures and converts x-...
, • Both are based on the thin-film transistor as an active matrix array
(AMA)
• Built the size of a conventional S/F receptor - ANSWERSThe two types of DDR systems
Pixels are read sequentially, one at a time - ANSWERSAMA- Active Array Matrix
Each TFT and detector
represents a... - ANSWERSpixel
charge collecting
detector element - ANSWERSDEL
Digital Value depends on: - ANSWERSCharge collected by DEL & Bit depth
• CsI is coated over an active matrix array (AMA) of amorphus silicon (aSi)
photodiodes - ANSWERSDDR using cesium iodide scintillation
phosphors
means without shape - ANSWERSAmorphus
are used to detect light or measure its intensity also
called a charge coupled device (CCD) - ANSWERSPhotodiodes
.Exit x-rays interact with CsI scintillation phosphor to produce light
• The light interact with the a-Si to produce a signal
• The TFT stores the signal until readout, one pixel at a time - ANSWERSDDR steps using cesium iodide
• The exit x-ray photon interact with the a-Se (detector element/DEL).
Photon energy is trapped on detector (signal) (instead of a-Si used
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