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RADT 456

ARRT Registry Review Covering Equipment operation and quality control

QuestionAnswer
What are light-sensitive AEC devices known as? Phototimers.
What is the device used to test the accuracy of the phototimer? Spinning top.
Give some examples of inherent filtration? Glass envelope, oil coolant, tube housing, etc.
What controls voltage with varying resistance? Rheostat.
What part of the x-ray tube is located outside of the glass envelope? Stator.
What is the amount of electrical charge flowing per second? Current.
The input phosphor functions to convert what to what? X-rays to light.
A solid-state diode does what? It changes alternating current to unidirectional current.
Automatic brightness control functions to do what in fluoroscopy tubes? It functions to compensate for patient part thickness.
What percentage of actual x-rays are produced on the target surface? 1%.
Which device is adjusted on the x-ray circuitry when kilovoltage is changed? Autotransformer.
What has replaced the image intensifiers television camera tube on fluoro towers? Charge-coupled device.
What is the device that receives the remnant beam, converts it to light, and increases the brightness? Image intensifier.
What voltage ripple does a three-phase, six-pulse generator have? 13%?
What converts electrical energy to mechanical energy? Motor.
What tests the congruence of the x-ray beam with the light field? Radiopaque objects or the penny test.
The electron cloud is produced through a process called what? Thermionic emission.
What causes pitting on the anode? Repeated, frequent overloading.
What is the image intensifiers input phosphor made of? Cesium iodide.
A plate with photostimulable phosphors is used with what modality? Computed radiography.
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ARRT registry review covering Unit 5: Radiation Protection

 

 



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