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What part of the x-ray beam helps contribute to forming the image
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What is the principle factor affecting beam quantity
pp.434
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Radt 456 Liz Delong
Equipment Operation and Quality Control
| Question | Answer |
|---|---|
| What part of the x-ray beam helps contribute to forming the image pp. 434 | exit beam or remant beam |
| What is the principle factor affecting beam quantity pp.434 | mAs |
| What is the principle factor affecting beam quality pp.434 | kVp |
| The gradual decrease in an exposure rate as radiation passes through tissue pp.434 | attenuation |
| The type of transformer that increases the voltage pp. 440 | step up or high voltage |
| Generators convert what type of energy pp. 437 | converts mechanical energy into electrical energy |
| What is the autotransformer law/transformer law pp. 441 | Vs/Vp=Ns/Np |
| Rectifers are made from what type of material pp/ 442 | silicon, selenium, germanium |
| What components are part of the cathode pp. 444 | one or more filaments, supporting wires for the filaments, and focusing cup |
| What is the function of the line voltage compensator pp. 452 | functions to adjust automatically for any fluctuations in incoming voltage supply |
| What is the function of the mAs timer pp. 452 | the timer monitors the product of mA and time and will terminate the exposure when the desired mAs has been reached |
| What is the filament circuit responsible for pp. 455 | It supplies low voltage current to the filament of the x-ray tube |
| What is the "Moire" affect pp. 461 | This affect is associated with digital imaging and grids. If direction of the lead strips and the grid lines per inch matches the scan frequency of the scanner/reader will cause artifact |
| What is radiographic QC pp. 493 | A organized and methodical evaluation of imaging comments from the x-ray tube to the automatic film processor, with the purpose of decreasing repeat exposures, thereby decreasing patient radiation exposure and increasing cost effectiveness |
| Who is responsible for QC testing pp. 493 | QC technologist, service engineer, and medical physicist |
| What tool is used to evaluate mA stations pp. 495 | aluminum step wedge or penetrometer |
| How often should collimators be inspected pp.496 | Semiannually |
| Focal spot size can be measured with _________ pp. 497 | pinhole camera |
| How often should personal fluoroscopic shields checked pp. 498 | Annually |
| What is the definition for half value layer pp. 496 | the thickness of any absorber that will reduce x-ray beam intensity to one-half its original value |
Created by:
esdelong
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