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RADT 465: Equipment
ARRT Registry Review: Equipment Operation and Quality Control
| Question | Answer |
|---|---|
| All of the following are associated with the anode except | D.)thermionic emission (Selman, 9th ed., pp. 138-139) |
| The type of x-ray tube designed to turn on and off rapidly, providing multiple short, precise exposures is | B.)grid-controlled (Shepard, p. 367) |
| The minimum response time of an automatic exposure control (AEC) | B.)is its shortest possible exposure time (Carlton and Adler, 4th ed., pp. 102-103) |
| The electron cloud within the x-ray tube is the product of a process called | B.)thermionic emission (Bushong, 8th ed., p. 118) |
| Which of the following causes pitting, or many small surface melts, of the anode's focal track? | D.)repeated, frequent overloading (Selman, 9th ed., pp. 137-138) |
| A parallel-plate ionization chamber receives a particular charge as x-ray photons travel through it. This is the operating principle of which of the following devices? | A.)AEC (Carlton and Adler, 4th ed., p. 102) |
| Congruence of the x-ray beam with the light field is tested using | C.)radiopaque objects (Carlton and Adler, 4th ed., p. 484) |
| What is the relationship between kV and HVL? | A.)as kV increases, the HVL increases (Selman, 9th ed., pp. 122-123) |
| As window level increases | C.)brightness increases (Fosbinder and Orth, p. 208) |
| Which of the following devices converts electrical energy to mechanical energy? | A.)motor (Selman, 9th ed., p. 78) |
| A three-phase timer can be tested for accuracy using a synchronous spinning top. The resulting image looks like a | B.)solid arc, with the angle (in degrees) representative of the exposure time (Selman, 9th ed., p. 106) |
| Star and wye configurations are related to | B.)rectification systems (Selman, 9th ed., p. 163) |
| What is the device that directs the light emitted from the image intensifier to various viewing and imaging apparatus? | B.)beam splitter (Selman, 9th ed., p. 262) |
| Which of the following systems function(s) to compensate for changing patient/part thicknesses during fluoroscopic procedures? | A.)automatic brightness control (Bushong, 8th ed., p. 360) |
| The x-ray tube in a CT imaging system is most likely to be associated with | C.)a pulsed x-ray beam (Bushong, 8th ed., pp. 429-430) |
| To maintain image clarity is an image-intensifier system, the path of electron flow from the photocathode to the output phosphor is controlled by | B.)electrostatic lenses (Carlton and Adler, 4th ed., pp. 569-570) |
| Which part of an induction motor is located within the x-ray tube glass envelope? | D.)rotor (Carlton and Adler, 4th ed., p. 73) |
| Which of the following devices is used to control voltage by varying resistance? | C.)rheostat (Selman, 9th ed., p. 147) |
| Light-sensitive AEC devices are known as | A.)phototimers (Shepard, pp. 275-276) |
| Which of the following formulas would the radiographer use to determine the total number of heat units produced with a given exposure using three-phase, six-pulse equipment? | C.)mA x time x kV x 1.35 (Selman, 9th ed., pp. 145-146) |
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