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Questions and Answers
What is the difference between a variable kVp chart and a fixed kVp chart?
What is the difference between a variable kVp chart and a fixed kVp chart?
- Variable kVp charts use an optimum mAs value for each projection while fixed kVp charts use a specific kVp value for each projection
- Variable kVp charts use an optimum kVp value for each projection while fixed kVp charts use a specific mAs value for each projection (correct)
- Variable kVp charts use a specific kVp value for each projection while fixed kVp charts use an optimum mAs value for each projection
- Variable kVp charts use a specific mAs value for each projection while fixed kVp charts use an optimum kVp value for each projection
What is the advantage of a fixed kVp chart over a variable kVp chart?
What is the advantage of a fixed kVp chart over a variable kVp chart?
- More latitude for exposure error (correct)
- Greater visibility of the spatial resolution
- Higher overall image contrast
- Small incremental changes in exposure techniques
What is a modified fixed kVp chart?
What is a modified fixed kVp chart?
- A chart that uses a specific kVp value for each projection and varies the mAs according to the patient/part thickness
- A chart in which mAs is the primary variable but kVp fluctuates within a range of ±4 kVp from the optimum level (correct)
- A chart that uses a specific mAs value for each projection and varies the kVp by 2 to 3 kVp/cm for changes in patient/part size
- A chart in which kVp is the primary variable but mAs fluctuates within a range of ±4 mAs from the optimum level
