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What part of the imaging plate in a CR system records the image?
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What transforms light into the image in a PSP system?
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Image Production
ARRT Registry Review- Image Production and Eval
| Question | Answer |
|---|---|
| What part of the imaging plate in a CR system records the image? | Photstimulable phosphor (197) |
| What transforms light into the image in a PSP system? | Analog to Digital Converter (197) |
| What does windowing refer to? | changing brightness and/or contrast (198) |
| What position should radiographic film be stored in? | Vertically (199) |
| Name a few pathologic conditions in which technique needs to be increased? | ascites, pagets, pneumonia, CHF, atelectasis (238) |
| Name a few pathologic conditions in which technique needs to be decreased. | Osteoporosis, osteomalacia, emphysema (238) |
| How is grid ratio determined? | height of lead strips:width between strips (239) |
| What is the direction of electron movement in the x-ray tube? | cathode to anode (205) |
| What is grid cutoff? | absorption of useful radiation (206) |
| What changes the latent image to a computerized image in CR? | Analog to Digital Converter (206) |
| What is the correct order of steps in a film processor? | Developer, Fixer, Washer, then Dryer (209) |
| What is reduction of photons as it passes through an object? | Absorption (209) |
| What is used to overcome drastic variation in tissue densities? | Compensating filter (210) |
| What is the lead layer on the back of an IP for? | prevent scatter (213) |
| What imaging system offers the widest dynamic range? | CR (213) |
| What device is used to measure object thickness? | caliper (214) |
| As kV increases, what is the impact on the image? | longer contrast scale (216) |
| What test evaluates focal spot accuracy? | slit camera (257) |
| What test evaluates focal spot size? | slit camera/pinhole camera/star pattern (257) |
| What is the ratio of height of lead strips to distance between them? | Grid ratio (217) |
| Where is the greatest intensity in the beam with the anode heel effect? | Cathode end (217) |
| What stores, archives, exchanges, and transmits digital images? | PACS (261) |
| What term means an object is projected on IR smaller than it really is? | foreshortening (222) |
| What is the minimum alteration required to notice a change in density? | +30% mAs (222) |
| What temperature should film be stored at? | 40-60 degrees Farenheit (268) |
| What humidity should film be stored at? | 40-60 % humidity (268) |
| What do high temperatures/humidity cause? | fog and loss of contrast (268) |
| What does low humidity do to the film? | create static electricity (268) |
| What is the line-focus principle? | principle that actual focal spot is larger than the effective spot size (270) |
| What is continued emission of light by phosphor after the source has stopped? | phosphorescence (226) |
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magrissom
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