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Questions and Answers
What is the major disadvantage of using calcium tungstate as a phosphor for radiographic imaging?
What is the major disadvantage of using calcium tungstate as a phosphor for radiographic imaging?
- Increased sharpness of the image
- Decreased patient dose
- Reduced thermal stress on the x-ray tube
- Decreased sharpness of the image (correct)
Which phosphor emits light in the green region of the spectrum?
Which phosphor emits light in the green region of the spectrum?
- Yttrium
- Lanthanum oxybromide
- Gadolinium oxysulfide (correct)
- Barium lead sulfate
Why are rare earth elements preferred in radiographic imaging intensifying screens?
Why are rare earth elements preferred in radiographic imaging intensifying screens?
- They convert x-ray energy to light more efficiently (correct)
- They have a low patient dose
- They emit UV light
- They emit blue light
Which phosphor is particularly used with high kilovolt peak (kVp) techniques?
Which phosphor is particularly used with high kilovolt peak (kVp) techniques?
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What favorable property is influenced by the thickness, concentration, and size of the phosphor crystal in a radiographic intensifying screen?
What favorable property is influenced by the thickness, concentration, and size of the phosphor crystal in a radiographic intensifying screen?
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