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Radt 456 QC
AART Registry Review
| Question | Answer |
|---|---|
| What type of radiation is produced when a high speed electron gets attracted to the positively charge nucleus but is deflected from its course with a loss of energy? | Bremsstrahlung Radiation pg 431 |
| The gradual decrease in exposure rate as radiation passes through tissue is ...? | Attenuation pg 434 |
| Photoelectric effect significantly contributes to patient dose or tech dose? | Patient dose and that creates short scale contrast pg 434 |
| T or F? Generators function to change electrical energy to mechanical energy? | F - generators change mechanical energy to electrical energy pg 439 |
| What are transformers used for? | They increase the incoming voltage to the more useful kilovoltage required for x-ray production pg 440 |
| The relationship between the turns ratio and voltage is _______, whereas the turns ratio and current is _____? | Direct, Inverse pg 440 |
| T or F? Autotransformers operate on the principle of self-induction, and functions to provide a selection of kilovoltages? | True pg 442 |
| Where is the x-ray circuit rectification system located? | Between the secondary coil of the high-voltage transformer and the x-ray tube pg 442 |
| What is the function of a rectifier? | To change AC to a more useful unidirectional current or permit the flow of electricity in only one direction pg 443 |
| T or F? Heating of the filament to incandescence and subsequent "boiling off" of electrons is called dual focus | F - it is called thermionic emission pg 446 |
| Excessive heat loading will cause accelerated tube aging and failure as a result of these conditions stated in the book. Name them. | pitted or cracked anode, gassy tube, and vaporized tungsten pg 451 |
| List the components on the primary side or low voltage side of the circuit. There are eight listed in the book. | Main switch, circuit breakers, autotransformer, kV selector, line voltage compensator, timer, primary coil of the high voltage transformer, and exposure switch pg 451-455 |
| List the components on the secondary side or high voltage side. There are four listed in the book. | secondary coil of HV transformer, mA meter, rectifiers, X-ray tube pg 455 |
| T or F? The process of energy conversion within the II is electrical to light, then to electrical, then back to light | True pg 481 |
| In _______ _______ there is no chemical processing, higher signal to noise ratio, less patient dose, and postprocessing capability. | Digital Fluoroscopy pg 484 |
| Radiologic QC involves monitoring and regulating the variables associated with image production and ______ _____. | Patient care pg 493 |
| What is a step wedge or penetrometer used for, in relation to a QC program? | To evaluate the mA pg 495 |
| The congruency of the collimator light field and actual x-ray field should be within what percentage of the SID? | 2% pg 496 |
| How can personal fluoroscopic shielding apparel be checked for cracks and how often should this test be done? | The apparel can be checked under fluoro and should be done every year pg 498 |
| T of F? The CR image plates and the photostimulable phosphor screens should be looked over once every year? | False - the IP's should be looked at on a regular basis for damage and the PSP screens should be wiped off monthly pg 499 |
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krpitylak
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