Term
| Which of the following is the most appropriate measure of x-ray beam quality? |
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Definition
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Term
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Definition
| That thickness of an absorber that will reduce the x-ray intensity to one half its original value. |
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Term
| The quality of an x-ray beam is principally a function of which of the following? |
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Definition
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Term
| The HVL is affected principally by a change in which of the following? |
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Definition
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Term
| When filtration is added to an x-ray tube, which of the following increases? |
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Definition
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Term
| Which of the following is the probable HVL of a radiographic x-ray beam at 70 kVp? |
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Definition
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Term
| As filtration is added to an x-ray beam: |
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Definition
| Low energy x-rays are removed more readily than high |
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Term
| An increase in mAs will increase which of the following? |
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Definition
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Term
| It is often stated that mAs controls quantity and kVp controls: |
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Definition
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Term
| However, it should be clear that mAs controls quantity and kVp controls: |
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Definition
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Term
| If the mA during fluoroscopy is increased by 25%: |
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Definition
| The scatter exposure to the operator is increased by 25% |
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Term
| A minimum HVL is required for diagnostic x-ray beams because: |
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Definition
| A lower HVL would result in an increased absorbed dose to the patient with no improvement in image quality |
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Term
| An x-ray beam can be made to have higher effective energy if which of the following occurs? |
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Definition
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Term
| Filtration will increase: |
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Definition
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Term
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Definition
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Term
| Adding filtration to an x-ray beam will: |
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Definition
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Term
| A radiographic tube has 0.5 mm Al inherent filtration, 1.0 mm Al added filtration, and 1.0 mm Al filtration in the light-localing collimator, Therefore, the total filtration is: |
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Definition
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Term
| A representative radiographic tube has 0.5 mm Al inherent filtration and 2.0 mm Al added filtration. An additional 1.0 mm Al filtration will: |
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Definition
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Term
Which of the folllowing is the softest radiation?
Diagnostic x-rays, Grenz rays, Megavoltage x-rays, Orthovoltage x-rays, or Supervoltage x-rays |
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Definition
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Term
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Definition
| A thickness of attenuator that will halve x-ray quantity |
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Term
| To measure HVL, which of the following is required? |
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Definition
| A collimator and Aluminum abosrbers |
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Term
| As the HVL of a beam increases, its penetrability: |
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Definition
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Term
| If increasing the kVp increases the HVL, x-ray quantity will: |
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Definition
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Term
| If the HVL is increased by the addition of 1 mm Al, x-ray quantity will: |
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Definition
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Term
| At 70 kVp, the x-ray beam is atttenuated in soft tissue approximately: |
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Definition
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Term
| There is a 75% chance that an x-ray will be attenuated by 2 mm lead. The HVL is: |
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Definition
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Term
| What occurs when the small rather than the large cathode coil is energized? |
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Definition
| smaller effective focal spot |
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Term
| Added filtration affects the x-rays beam in what way? |
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Definition
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Term
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Definition
| Decreases the intensity of all energies of the x-ray beam |
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Term
| If patient thickness is 6 HVLs, what is the approximate intensity at the midline of the patient? |
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Definition
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Term
| A diagnostic x-ray beam has an HVL of approximately 3 cm soft tissue. What percentage of the beam is absorbed by a 21 cm abcomen? |
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Definition
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