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QM Registry Ch.7
QC of X-ray Generators and Ancillary Radiographic Equip't
| Question | Answer |
|---|---|
| The actual area of the x-ray tube target from which x-rays are emitted | actual focal spot |
| Electronic system that terminates the x-ray exposure once an adequate amount of radiation has been emitted | automatic exposure control |
| A portion of an AEC system that compares the amount of radiation detected with a preset value | comparator |
| International System of Units radiation intensity equivalent to 3876 roentgens | coulomb/kilogram |
| AKA sensor, it is a radiation detector that monitors the radiation exposure at or near the patient and produces a corresponding electric current that is proportional to the quantity of x-rays detected | detector |
| The area of the x-ray tube target that emits x-rays when viewed from the perspective of the image receptor | effective focal spot |
| An increase in stated focal spot size, usually as a result of an increase in mA | focal spot blooming |
| The margin of error in centering the central ray of the x-ray beam to the center of the grid | grid latitude |
| The amount of filtering material that reduces the intensity of radiation to one-half of its previous value | half-value layer |
| A type of x-ray generator that dramatically increases the frequency of altering current sent to the x-ray tube | high-frequency |
| A device used in quality control testing that is uniform in thickness and density | homogenous phantom |
| A type of gas-filled radiation detector | ion chamber |
| A rating of power output for x-ray generators | kilowatt rating |
| Law stating that the amount of x-ray tensity should remain constant at a specific mAs value despite the mA and time combination | Law of Reciprocity |
| A type of conventional tomography whereby the x-ray source and image receptor undergo reciprocal motion in a straight line | linear tomography |
| A principle stating that the effective focal spot always appears smaller than the actual focal spot because of the anode angle | line focus principle |
| Sequential increases in mAs should produce the same sequential increase in exposure rate | linearity |
| A smaller-size x-ray generator mounted on wheels that can be transported to various locations | mobile x-ray generator |
| The region remaining relatively sharp in detail during tomographic procedures | objective plane |
| An electronic device used for detecting photons light, x-rays, or gamma rays | photodetector |
| A specialized type of tomographic unit that allows for multiple-direction motion of the x-ray source and image receptor | pluridirectional tomography |
| A type of x-ray generator that is small enough to be carried from place to place by one person | portable x-ray generator |
| The amount of x-ray intensity should remain constant at a specific mAs value despite the mA and time combination | reciprocity |
| The same technique setting should always create the same exposure rate at any time | reproducibility |
| The special unit of radiation exposure or intensity | roentgen |
| The radiation detector assembly in an AEC system | sensor |
| A type of x-ray generator with a single source of alternating current | single-phase |
| A radiation detector with silicon and germanium crystals | solid state detector |
| An alternating-current power source made up of three single-phase currents that are staggered by 120 degrees | three-phase |
| The variation from the peak voltage through the x-ray tube in an x-ray generator | voltage ripple |
Created by:
sspatel
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