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Radt465 EO and QC
ARRT Registry review covering equipment operations and quality control
| Question | Answer |
|---|---|
| What type of x-ray tube designed to turn on and off rapidly, providing multiple short, precise exposures? | grid-controlled p279 |
| If exposure factors of 85 kV, 400 mA, and 12 ms yield an output exposure of 150 mR, what is the milliroentgens per milliampereseconds (mR/mAs)? | 31 p279 |
| What is the minimum response time of automatic exposure control (AEC)? | is its shortest possible exposure time p280 |
| What causes pitting, or many small surface melts, of the anode's focal track? | Repeated, frequent overloading p280 |
| 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? | AEC p281 |
| Congruence of the x-ray beam with the light field is testing using what? | radiopaque objects p281 |
| As window level increases what happens? | brightness increases p282 |
| The voltage ripple associated with a three-phase, six-pulse rectified generator is about what percent? | 13% p283 |
| The device that receives the remnant beam, converts it into light, and then increases the brightness of that light is what? | image intensifier p283 |
| A high-speed electron entering the tungsten target is attracted to the positive nucleus of a tungsten atom and, in the process, is decelerated. This results in what? | Bremsstrahlung radiation p284 |
| A three-phase timer can be tested for accuracy using a synchronous spinning top. The resulting image looks like what? | solid arc, with the angle (in degrees) representative of the exposure time p284 |
| The procedure whose basic operation involves reciprocal motion of the x-ray tube and film is what? | tomography p284 |
| In fluoroscopy, the automatic brightness control is used to adjust what? | kilovoltage (kV) and milliamperage (mA) p284 |
| Star and wye configurations are related to what? | three-phase transformations p284 |
| What is the device that directs the light emitted from the image intensifier to various viewing and imaging apparatus? | Beam splitter p285 |
| As electrons impinge on the anode surface, less than 1% of their kinetic energy is changed to what? | x-rays p285 |
| How many half-value layers will it take to reduce an x-ray beam whose intensity is 78R/min to an intensity of less than 10R/min? | 3 p286 |
| A device used to ensure reproducible radiographs, regardless of tissue-density variations, is what? | automatic exposure control p287 |
| The device used to change alternating current to unidirectional current is what? | a solid-state diode p287 |
| To maintain image clarity in an image-intensifier system, the path of electron flow from the photocathode to the output phosphor is controlled by what? | electrostatic lenses p287 |
| The image-intensifier tube's input phosphor functions to convert what to what? | x-rays to light p287 |
Created by:
jasproles
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