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RADT 412
QC & QA
| Question | Answer |
|---|---|
| How often should you check Exposure Timer Accuracy? | Annually |
| What is the Acceptable Range of Exposure Timer Accuracy? | + or - 5% |
| How often should you check mA Linearity? | Annually |
| What is the Acceptable Range of mA Linearity? | + or - 10% adjacent stations |
| How often should you check Exposure Reproducability? | Annually |
| What is the Acceptable Range of Exposure Reproducability? | + or - 5% |
| How often should you check Kilovoltage Peak Calibration? | Annually |
| What is the Acceptable Range of Kilovoltage Peak Calibration? | + or - 5% |
| How often should you check Half-Value Layer / Filtration? | Annually |
| What is the Acceptable Range of Half-Value Layer / Filtration? | Exceed required minimum (amount of thickness of absorber material "usually aluminum" needed to reduce the intensity of the x-ray beam to one-half of the original) |
| How often should you check Collimation? | Semi-Annually |
| What is the Acceptable Range of Collimation? | + or - 2% of the SID |
| How often should you check Vertical Beam Alignment? | Semi-Annually |
| What is the Acceptable Range of Vertical Beam Alignment? | + or - 2 degrees from vertical |
| How often should you check Focal Spot Size / Condition? | Annually |
| What is the Acceptable Range of Focal Spot Size / Condition? | + or - 50% of nominal size |
| How often should you check the Image Receptor System? | Semi-Annually |
| What is the Acceptable Range of a Image Receptor System? | Zero visible defects |
| How often should you check the Automatic Exposure Control? | Annually |
| What is the Acceptable Range of the Automatic Exposure Control? | + or - 10% |
| With HVL, the higher the HVL of an x-ray beam, the _____ penetrating the beam | more |
| Acceptance testing of x-ray equipment is performed by a ______ prior to daily use. | medical physicist |
| In medical imaging departments with a quality control program in place, the great majority of repeated exposures are due to improper: | Positioning |
| The device (provided by many manufacturers of display monitors) designed to directly measure luminance, or the light intensity emitted from a display monitor, is the: | Photometer |
| Determining how consistently radiologists' image interpretations match ultimate patient diagnosis is called ____. | outcome assessment/analysis |
| T/F: Quality control refers to the calibration and monitoring of equipment. | True |
| The minimum source-to-table distance for stationary fluoroscopy units is: | 15 inches |
| The minimum source-to-table distance for mobile fluoroscopy units is: | 12 inches |
| The ability to be given a negative diagnosis when no disease is present is termed: | specificity |
| The ability to detect disease is termed: | sensitivity |
Created by:
rdwilliams
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