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RADT 456 E.O. & Q.C.
ARRT registry review covering Equipment Operation & Quality Control content area
| Question | Answer |
|---|---|
| Bremsstrahlung radiation make up what percent of the x-ray beam? | 70%-90% pg. 437 |
| What percent of the x-ray beam does characteristic radiation make up? | 10%-30% pg. 437 |
| Compton scatter ejects an _________ ________ electron. | outer shell pg. 440 |
| The number of cycles per unit of time is the definition of __________. | frequency pg. 443 |
| The unit of measurement for frequency is _________. | Hertz (Hz) pg. 444 |
| Which scientist observed that a magnetic field with induce an electric current? | Faraday pg. 445 |
| A singe-phase, full-wave rectified waveform has a ___ % voltage ripple. | 100 pg. 448 |
| A three-phase/six-pulse rectification has a ___ % voltage ripple. | 13 pg. 449 |
| A three-phase/twelve pulse rectification has a ___ % voltage ripple. | 4 pg. 449 |
| The focal track of the anode is made up of what kind of material? | Tungsten and rhenium alloy pg. 451 |
| For a single phase unit, heat units can be determined by the equation? | mA X s X kV = HU pg. 454 |
| Causes of x-ray tube failure are _________, ________, ________, and _________. | vaporized tungsten, pitted anode, cracked anode, and gassy tube. pg. 455-457 |
| This part of the x-ray circuit functions to automatically adjust for any fluctuations in incoming voltage supply and is located on the primary side. | Line voltage compensator pg. 458 |
| This part of the x-ray circuit is a system of diodes that is located between the secondary coil of the high-voltage transformer and the x-ray tube. | Rectifiers pg. 461 |
| The range of grays a particular digital system is capable of resolving/demonstrating. | Contrast Resolution pg. 466 |
| The ratio of light photons at the output phosphor to the number at the input phosphor. | Flux gain pg. 482 |
| The ratio of the diameters of the input and output screens squared refers to _________. | Minification gain pg. 482 |
| Diminished resolution and contrast at the periphery. | Vignetting pg. 483 |
| The thickness of any absorber and the recording that will reduce x-ray beam intensity to one-half its original value. | Half-Value Layer pg. 497 |
| Test performed annually that evaluates the consistency of x-ray tube output and should not vary more than 5%. | Reproducibility pg. 497 |
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