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RADT 465 EO and QC

ARRT REGISTRY REVIEW Equipment Operation and Quality Control

QuestionAnswer
The portion of the focal track that is bombarded by electrons is called? Actual focal spot
Thermionic Emission When cathode filament is heated to incandescence and releases electrons
Three components of CT imaging Gantry, computer, and operating console
Minimum response time or minimum reaction time is? Length of the shortest exposure possible with a particular AEC
Rectification Process of changing alternating current to unidirectional current
Anode target material has? High atomic number and high melting point
Filtration Added to x-ray beam to remove the lower-energy photons and overall energy or wavelength of beam greater
If kilovoltage is increased More energy photons are produced
An increase in milliamperage Increase number of photons produced at target but unrelated to their energy
A large amount of heat applied to a cold anode can cause? Cracking of anode
In electronic/digital imaging chances in window width affect ------- and changes in window level affect? Contrast scale and brightness
All circuit devices located before primary coil of high-voltage transformer is called? Primary or low-voltage side
What converts electrical energy to mechanical energy? Motor
What converts mechanical energy into electrical energy? Generator
A phototimer is a type of AEC used to? Automatically terminate the x-ray exposure once film is correctly exposed
When you test the efficiency of various parts of imaging system? Quality control
Voltage ripple Percentage drop from maximum voltage each pulse of current experiences
Filtration that is built into the construction of the x-ray tube is called Inherent filtration
X-rays are energetic enough to rearrange atoms in materials through which they pass and they can therefore be hazardous to living tissue so x-rays are ------ radiation Ionizing
Current The amount of electric charge flowing per second
Voltage Potential difference existing between two points
Created by: jodif96
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