CRDR Study Exam Questions & Answers 2024/2025
CR- Diagnostic viewer replaces - ANSWERSfilm, storage, and viewboxes
QC reader replaces - ANSWERSdarkroom and processor and chemicals
CR v. DR- Image capture of CR (3) - ANSWERS1. imaging plate is used
2. IP is put in a reader
3. image is...
CR- Diagnostic viewer replaces - ANSWERSfilm, storage, and viewboxes
QC reader replaces - ANSWERSdarkroom and processor and chemicals
CR v. DR- Image capture of CR (3) - ANSWERS1. imaging plate is used
2. IP is put in a reader
3. image is sent to computer for manipulation
Image capture of DR (1) - ANSWERS1. image is captured and sent directly to computer
CR image formation- Typical x-ray tube and table are used, but an IP (imaging plate) - ANSWERSis used
rather than a film/screen cassette
-The IP records a - ANSWERSlatent image using photosimulable phosphors (europium activated barium
flurohalide- acts like a 200 speed screen
-Patient ID is - ANSWERSscanned on IP for identification
- IP is placed in - ANSWERSIP reader
- Inside the IP reader: (4) - ANSWERS1. a high intensity laser activates PSP sensors
2. these sensors emit a blue violet light
3. this light is read by a photomultiplier tube
4. the photomultiplier converts the light to an electric signal
, 5. the electronic signal is converted to a digital format for manipulation, enhancement, viewing, and
printing if desired
6. IP plate is erased by a bright light inside the reader, reloaded into the cassette and is ready for the next
exposure
7. entire process is 20 seconds
What phosphors does CR use? - ANSWERSbarium flurohalide
What does the barium flurohalide act like? - ANSWERSa 200 speed screen
Erasing plate (3) - ANSWERS1. a high intensity white light dumps all the remaining energy traps allowing
the plate to be re-used thousands of times (approximately up to 10,000 times before a new phosphor is
needed)
2. could erase by placing against viewbox for several minutes
3. once exposed, must avoid light that can stimulate PSP
Equipment (8) - ANSWERS1. CR reader
2. imaging plates and cassettes
3. QC workstation
4. Diagnostic workstation/viewer
5. laser printer
6. archive server
7. web server
8. film digitizer
Layers of the imaging plate (8) - ANSWERS1. protective coat
2. PSP crystal
3. binder
4. phosphor
5. reflective layer
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