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RADT 465 image acq

ARRT registry review covering image acquisiton and evaluation

QuestionAnswer
1. misalignment of the tube-part-IR relationship results in shape distortion (Lange Q&A p. 179)
2. in digital imaging, brightness is controlled by IR exposure, monitor functions, and postprocessing functions (Lange Q&A p. 179)
3. An algorithm, as used in x-ray imaging is a series of variable instructions (Lange Q&A p. 179)
4. the intensity of ionizing radiation decreases as distance from the source of radiation increases (Lange Q&A p. 180)
5. the reduction in x-ray photon intensity as the photon passes through material is termed attenuation (Lange Q&A p. 180)
6. if a lateral projection of the chest is being performed on an asthenic patient and the outer photo-cells are selected, what is likely to be the outcome Decreased IR exposure (Lange Q&A p. 181)
7. the component of the CR image plate that records the radiologic image is the photostimulable phosphor (Lange Q&A p. 181)
8. the radiation dose received by the digital detector for each image is indicated by the Exposure indicator (Lange Q&A p. 181)
9. the luminescent light emitted by the PSP is transformed into the image seen on the CRT by the ADC (Lange Q&A p. 181)
10 the term windowing describes the practice of changing the image brightness and/or contrast scale (Lange Q&A p. 182)
11. the radiographic object being placed at an angle to the IR can cause foreshortening (Lange Q&A p. 182)
12. three methods to minimize motion unsharpness suspend respiration, use short exposure time, and adequately instruct patient (Lange Q&A p. 182)
13. unopened boxes of radiographic film should be stored away from radiation and placed in what position vertical (Lange Q&A p. 183)
14. term to describe unsharp edges of tiny radiographic details blur (Lange Q&A p. 186)
15. A 5-in object to be radiographed at 44-in SID lies 6 in from the IR. What will be the image width? 6.1 in (Lange Q&A p. 186)
16. Tiny increased brightness, dropout artifacts, is a representation of dust/dirt on the PSP (Lange Q&A p. 187)
17. Using a short SID with a large IR is likely to increase the anode heel effect (Lange Q&A p. 187)
18. chemical fog on a radiographic film image mage be attributed to excessive developer temperature, oxidizer developer, and excessive replenishment (Lange Q&A p. 187)
19. because of the anode heel effect, the intensity of the x-ray beam is greatest along the cathode end of the beam (Lange Q&A p. 187)
20. using a 48-in SID, how much OID must be introduced to magnify an object two times 24-in OID (Lange Q&A p. 188)
21. analog-to-digital conversion is required in the following imaging system CR (Lange Q&A p. 188)
22. for the same FOV, spatial resolution will be improved using a larger matrix (Lange Q&A p. 188)
23. the absorption of useful radiation by a grid is called grid cutoff (Lange Q&A p. 189)
24. where is focal-spot blur the greatest toward the cathode end of the x-ray beam (Lange Q&A p. 191)
25. how are mAs and patient dose related mAs and patient dose are directly proportional (Lange Q&A p. 191)
26. Materials that could be used as grid interspace material plastic, aluminum (Lange Q&A p. 192)
27. Correct order of radiographic film processing developer, fixer, wash, dry (Lange Q&A p. 192)
28. what is the purpose of the thin layer of lead that is often located in the rear portion of the IP To prevent scattered radiation fog (Lange Q&A p. 196)
29. the purpose of the electroconductive layer of a CR PSP plate is to facilitate transportation through the scanner/reader (Lange Q&A p. 196)
30. the x-ray image seen on the computer display monitor is a(an) ___ image analog (Lange Q&A p. 197)
Created by: hayley_kidwell92
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