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RADT 465: EO & QC
ARRT registry review covering Equipment operation and QC
| Question | Answer |
|---|---|
| The type of x-ray tube designed to turn on and off rapidly, providing multiple short, precise exposures, is what? (pg 279) | grid-controlled |
| Congruence of the x-ray beam with the light field is tested using? (pg 281) | radiopaque objects |
| A parallel-plate ionization chamber receives a particular charge as x-ray photons travel through it. This is the operating principle of which device? (pg 281) | AEC |
| The electron cloud within the x-ray tube is the product of a process called? (pg 280) | thermionic emission |
| The minimum response time of an automatic exposure control (AEC) (pg 280) | is its shortness possible exposure time |
| The voltage ripple associated with a three-phase, six-pulse rectified generator is about? (pg 283) | 13% |
| The device that receives the remnant beam, converts it into light, and then increases the brightness of that light is the? (pg 283) | image intensifier |
| Which device converts electrical energy into mechanical energy? (pg 282) | motor |
| As window level i ncreases...? (pg 282) | brightness increases |
| What is the relationship between kv and HVL? (pg 282) | as kv increases, the HVL increases |
| What are components of the secondary, or high voltage, side of the x-ray circuit? (pg 282) | rectification system |
| Patient dose during fluorscopy is affected by the? (pg 282) | the distance between the patient and the input phosphor, amount of magnification, tissue density |
| A slit camera is used to measure? (pg 282) | focal-spot size, spatial resolution |
| Star and wye configurations are related to? (pg 284) | three phase transformers |
| When the radiographer selects kilvoltage on the control panel, which device is adjusted? (pg 284) | autotransformer |
| Which system function(s) to compensate for changing patient/part thickness during fluoroscropic procedures? (pg 285) | automatic brightness control |
| What is the device that directs the light emitted from the image intensifier to various viewing and imaging apparatus? (285) | beam splitter |
| The image-intensifier tube's input phosphor functions to convert? (pg 287) | x-rays to light |
| To maintain image clarity in an image-intensifier system, the path of eletron flow from the photocathode to the output phosphor is controlled by? (pg 287) | electrostatic lenses |
| The device used to change alternating current to undirectional current is? (pg 287) | capacitor |
| A device used to ensure reproducible radiographs, regardless of tissue-density variations, is the? (pg 287) | grid device |
| Which part of an induction motor is located outside the x-ray tube glass envelope? (pg 289) | filament |
| With what frequency must radiographic equipment be checked for linearity and reproducibility? (pg 289) | annually |
| Which part of an induction motor is located within the x-ray tube glass envelope? (pg 289) | focusing cup |
| Which term describes the amount of electric charge flowing per second? (pg 288) | voltage |
| Circuit devices that permit electrons to flow in only one direction are? (pg 290) | solid state diodes |
| Fractional-focus tubes, with a 0.3 mm focal spot or smaller, have special application in? (pg 290) | magnification radiography |
| Light-sensitive AEC devices are known as? (pg 292) | phototimers |
Created by:
mnzeilinga
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