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RADT 456 Equip and Q

ARRT Registry Review

QuestionAnswer
What is the purpose of the filament current? Supplying low-voltage current to the filament of the x-ray tube. (Saia, Radiology Prep: p. 455)
What causes pitting or many small surface melts of the anode focal track? Repeated and frequent overloading (Saia, Lange Q&A: p. 280)
Congruence of the x-ray beam with the light field is tested by? Radiopaque objects (Saia, Lange Q&A: p. 281)
Which of the following is/are components of the secondary side of the x-ray circuit: 1. Rectification system 2. Autotransformer 3. kV meter (1) Rectification system (Saia, Lange Q&A: p. 282)
What device is used to convert electrical energy to mechanical energy? Motor (Saia, Lange Q&A: p. 301)
What converts mechanical energy to electrical energy? Generator (Saia, Lange Q&A: p. 301)
What is the primary function of the phototimer? Terminate x-ray exposure once the IR is correctly exposed. (Saia, Lange Q&A: p. 282, 301)
What is the voltage ripple of three phase, six pulse? 13% (Saia, Lange Q&A: p. 283, 302)
Which of the following will improve the spatial resolution of image-intensified images: 1. Very thing coating of cesium iodide 2. smaller diameter input screen 3. increased total brightness gain? 1&2(Saia, Lange Q&A: p. 283, 202)
What does a synchronous spinning top test look like? Solid arc, with the angle representative of the exposure time (Saia, Lange Q&A: p. 284, 304)
Star and Wye configurations are related to: Three phase transformers (Saia, Lange Q&A: p. 284, 304)
Automatic brightness control is used to adjust: kV and mA (Saia, Lange Q&A: p. 284, 304)
What is the device that directs the light emitted from the image intensifier to various viewing and imaging apparatus? Beam Splitter (Saia, Lange Q&A: p. 285, 305)
How often should kV settings be tested and how accurate should it be? Annually, +/- 4 kV (Saia, Lange Q&A: p. 286, 307)
A spinning top device can be used to evaluate: 1. timer accuracy 2. rectifier failure 3. effect of kV on contrast? 1&2 (Saia, Lange Q&A: p. 287, 308
Total brightness gain of an image intensifier is the product of: 1. flux gain 2. minification gain 3. focusing gain? 1 (flux gain) & 2 (minification gain) (Saia, Lange Q&A: p. 287, 208)
Device used to change alternating currecnt to unidirectional current is? Solid state diode (Saia, Lange Q&A: p. 287, 309)
Deposited vaporized tungsten on inner surface of x-ray tube glass window does what to the tube/ beam? Adds filtration to window (Saia, Lange Q&A: p. 288, 309)
What device is used to control voltage by varying resistance? Rheostat (Saia, Lange Q&A: p. 292, 314)
What is rheostate? Variable resistor that is used to change voltage or current values. It is found in the filament circuit. (Saia, Lange Q&A: p. 292, 314)
Created by: smenke
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