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RADT465-EQ and QC
ARRT Registry Review Covering Equipment Operation and QC
| Question | Answer |
|---|---|
| Which type of target interaction comprises 70% to 90% of the x-ray beam? | Bremsstrahlung (Lange Prep Pg. 431) |
| Are frequency and photon energy directly or inversely related? | Directly related (Lange Prep Pg. 433) |
| Which interaction with matter is most responsible for patient dose? | Photoelectric effect (Lange Prep Pg. 434) |
| What converts mechanical energy to electrical energy? | Generators (Lange Prep Pg. 437) |
| Which type of transformers operate on the principle of self-induction? | Autotransformers (Lange Prep Pg. 441) |
| What does the process of full-wave rectification do? | Changes a non-useful negative half-cycle to a useful positive half-cycle (Lange Prep Pg. 442) |
| What type of voltage ripple is produced by a high-frequency generator? | Less than 1% voltage ripple (Lange Prep Pg. 442) |
| What is the focusing cup made up of? | Negatively charged nickel or molybdenum (Lange Prep Pg. 445) |
| What causes the anode to rotate? | Induction motor (Lange Prep Pg. 445) |
| Why is tungsten chosen as a target material? | High atomic number (74), high melting point (3,410 degrees C), thermal conductivity (Lange Prep Pg. 446) |
| What does the line focus principle state? | Effective focal spot is always smaller than the actual focal spot (Lange Prep Pg. 448) |
| What type of test is used to evaluate timer accuracy? | Spinning-top test (Lange Prep Pg. 454) |
| What is the typical entrance skin exposure rate in fluoroscopy? | 2 R/min (Lange Prep Pg. 476) |
| What happens to patient dose in fluoroscopy as the image intensifier (II) is moved closer to the patient? | Dose decreases as II moves closer to patient (Lange Prep Pg. 479) |
| What is the purpose of automatic brightness control in fluoroscopy? | Automatically adjust kV or mA to maintain constant brightness and contrast (Lange Prep Pg. 482) |
| What type of detector plates are used in computed radiography (CR)? | Photostimulable phosphor plates (PSP) (Lange Prep Pg. 459) |
| What happens in an indirect conversion detector? | X-rays are converted to light scintillations and the light is converted to electric signals (Lange Prep Pg. 466) |
| What should be the relationship between the collimator light field and the actual x-ray field? | Congruent to within 2% of the SID (Lange Prep Pg. 496) |
| How often do fluoroscopic shielding apparel need to be checked? | Annually (Lange Prep Pg. 498) |
| What is the life of a typical photostimulable phosphor plate (PSP) if cared for appropriately? | 10,000 exposures (Lange Prep Pg. 500) |
Created by:
marchuleta1
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