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RADT 456: Image Aqui
ARRT Registry Review
| Question | Answer |
|---|---|
| An increase in added filtratioin will result in: an increase in maximum entry of the x-ray beam, decrease in x-ray intensity, and/or an increase in effective energy of the x-ray beam? | Decrease in x-ray intensity and an increase in effective energy of the x-ray beam ( p. 196,234) |
| Grid interspace material can be made of? | AL and plastic fiber (p. 196, 235) |
| How will decreasing the field size from 14x17 to 8x10 with not other changes affect the scatter to the patient? | Decrease the amount of scatter radiation generated with in the part. (p. 196, 234) |
| What is the component of a CR image plate (IP) that records the image? | Photostimulable phosphor (p. 197, 235) |
| How long can a PSP hold an image before noticable image fading occurs? | 8 hours (p. 197, 235) |
| Luminescent light emitted by the PSP is transformed into the image seen on teh CR by the? | ADC (p. 197, 235) |
| The term windowing describes the practice of...? | Changing the image brightness and/or contrast scale. (p. 198, 235) |
| Factors that contribute to film fog include..? | Age of film, excessive exposure to safelight, and processor chemistry. (p. 199, 256) |
| X-ray photon energy is inversley related to wavelength or freqency? | Photon wavelength. (p. 199, 256) |
| Compared with low radio gride, high ratio grids will...? (how does it affect scatter) | Absorb more scatter and primary radiation. (p. 200, 257) |
| How does the laser beam size affect resolution in CR? | It increases the resolution of CR. (p. 201, 238) |
| Factors that determine the production of scattered radiation include field size, beam restriction, and/or kV? | All of them. (p. 201, 239). |
| To be suitable for use in an image intesifiers input screen, a phosphor should have which of the following characteristcs? Hi conversion efficiency, high x-ray absorption, and/or high atomic #? | All of them. (p. 201, 238) |
| Misalignment of the tube-part-IR relationship results in...? | Shape distortion. (p. 203, 240) |
| Using a short SID with a large IR will do what to the anode heel effect? | Increase it. (p. 203, 240) |
| Chemical fog may be attributed to excessive developer temperature, oxidizer, and/or excessive replenishment? | All of them. (p. 204, 241) |
| What direction do the electrons travel in reference to the anode and cathode? | Cathode to anode. (p. 205, 242) |
| Greater latitude is available to the radiographer in which of the following ways: using high-kV factors, using a low-ratio grid, and/or using low kV factors? | Using high dV factors and using a low ratio grid. (p. 204, 242) |
| The main difference between direct capture and indirect capture in DR is? | Direct capture does not use a scintilator to convert the image. (p. 205, 242). |
| What technical change would best serve to remedy the effect of very dissimlilar tissues: a small focal spot, high ratio grid, high kV factors, or high mAs factors? | Use high kv factors. (p. 205, 242) |
| Absorption of useful radiation by a grid is called...? | Grid cut off. (p. 205, 243) |
| Which of the following is/are tested as part of a quality assurace program: beam alignment, reporducibility, linearity? | All of them. (p. 207, 245) |
| Focal spot blur is greatest: directly along the course of the CR, Toward the cathode end of the beam, toward the anode end of beam, or as teh SID increases? | Toward the cathode end of the beam. (p. 207, 245). |
| Which of the following can impact the visibility of the anode heal effect: SID, IR size, and/or focal spot size? | SID and IR size. (p. 208, 247) |
| What is the purpose of the thin layer of lead that is often located in the rear portion of an IP? | To prvent scattered radiation fog. (p. 213, 252) |
| Purpose of the electroconductive layer of CR PSP plate is to: provide support to teh PSP layer, provide mechanical strength, facilitate trasportation through the scanner/reader, or provide better resolution? | Facilitate transportation through the scanner/ reader. (p. 213, 252) |
| Factors that can affect histogram appearance include: beam restriction, centering errors, and/or incorrect SID? | All of them. (p. 217, 258) |
| Which of the following requires two exposure to evaluate focal spot accuracy: pinhole camera, slit camera, star pattern, or bar pattern? | Bar pattern. (p. 217, 258) |
| A decrease in kV will produce a decrease in optical density, a drecrease in contrast, a decrease in recorded detail, or a decrease in image resolution? | A decrease in optical density. (p. 218, 260) |
| A QA program serves to: keep patient dose to a minimum, keep radiographic quality consistent, and/or ensure epquipment efficiency? | All of them. (p. 221, 264) |
| Where did I get this information? | Saia D. "Lange Q&A: Radiography examination". McGraw Hill. 2011 (9). |
Created by:
smenke
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