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1. What is the main function of an image receptor in radiography?
A. To generate x-rays
B. To receive x-ray photons and form an image
C. To shield the patient from radiation
D. To control image brightness
B. To receive x-ray photons and form an image
2. Which of the following is not a common cassette size?
A. 8x10"
B. 10x12"
C. 12x20"
D. 14x17"
C. 12x20"
3. The cassette’s main role during radiographic exposure is to:
A. Increase patient dose
B. Hold the x-ray tube in place
C. Protect and contain the image receptor
D. Reduce x-ray beam intensity before exposure
C. Protect and contain the image receptor
5. The front cover of a film–screen cassette is made of:
A. Lead
B. Steel
C. Rigid, radiolucent material
D. Phosphor
C. Rigid, radiolucent material
7. The active component in a CR cassette is the:
A. Intensifying screen
B. PSP plate
C. Lead backing
D. Film emulsion
B. PSP plate
4. In a film–screen system, the cassette helps reduce patient dose because:
A. It blocks all radiation
B. The screens convert x-rays into light, requiring less exposure
C. It stores x-rays for reuse
D. It prevents scatter entirely
B. The screens convert x-rays into light, requiring less exposure
6. Which layer of an intensifying screen converts x-rays into visible light?
A. Base
B. Reflective layer
C. Phosphor layer
D. Protective coat
C. Phosphor layer
8. One major disadvantage of CR systems is:
A. Requires chemical processing
B. Images fade if not read immediately
C. Cannot be reused
D. Noisy images
B. Images fade if not read immediately
9. During loading of a film-screen cassette, it is important to:
A. Use bright light to see the film clearly
B. Fully open the cassette
C. Handle the film by the edges
D. Use alcohol to clean the screen
C. Handle the film by the edges
10. Which system no longer requires a cassette?
A. Film–screen
B. Computed Radiography
C. Direct Digital Radiography
D. Fluoroscopy
C. Direct Digital Radiography
Describe the current use of cassettes in radiography.
Film screen - almost obsolete
CR - cassettes mainly used in CR
DDR - increasing standard in hospitals
State two proper cassette handling/ maintenance practices.
Load/unload in darkroom
Keep clean and dry
Inspect for cracks or dust
Never use alcohol or water on screens.
Compare film–screen, CR, and DR systems in terms of workflow speed and processing.
Film: screen: slow, chemical processing
CR: moderate, requires reader
DR: fastest, instant digital image.
State two functions cassette in radiography.
Protects the image receptor from light, dirt, and damage;
Attenuates x ray beam to reduce patient dose
Define an image receptor and give two examples.
Device that receives x-ray photons and forms the image;
Examples: film-screen, CR PSP imaging plate, DR flat panel detector.