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10 Cards in this Set
- Front
- Back
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Quality Assurance |
Any activity that provides adequate confidence that a radiology service will render a quality image and customer satisfaction. (Everything) |
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Quality Control |
An aspect of quality assurance that monitors safety and equipment to maintain quality standards. (Safety of equipment) |
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QC is a method of what? |
Controlling the radiologic image from start to finish. |
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Monitoring of Equipment Performance includes checking what? |
-external beam evaluation -ancillary equipment -digital equipment -fluoroscopy system -automatic exposure control -specialized systems |
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What equipment is needed for Focal Spot Size Estimation? |
-slit camera -star test pattern (for focal spots smaller than .3mm) -pinhole pattern (for focal spots larger than .3mm) |
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How often is the focal spot size estimation done? What is the anticipated result and corrective action? |
-annually -should be within 50% of the size stated in equipment specification, corrective action would be to replace the tube if the FFS has increased to an unacceptable level. |
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What is the Half Value Layer? |
The amount of filtration needed to reduce the intensity of the beam to 1/2 of the original kV value. |
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What equipment is needed to monitor the performance of the half value layer? What are the acceptable limits? How often is it tested? What type of corrective action is needed? |
- need a computerized dosimeter - acceptable limits vary by the original kV set - it is an annual evaluation - corrective action: if not enough filtration then aluminum filtration is added, if too much filtration then aluminum filtration removed. |
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What equipment is needed to test the collimator, central ray, and bucky accuracy? What are the acceptable variation limits? How often should this be tested? |
- equipment needed is radio-opaque markers - acceptable limits are + or - 2% of the SID *the centering mark should be within 1% of the light field central ray* - is an annual evaluation |
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What is the anticipated result when testing the collimator, central ray, bucky accuracy? What is the corrective action? How should the mirror sit in the collimator? |
Finish |
