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Xray Physics exam 2| 180 questions| with complete solutions $10.49
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Xray Physics exam 2| 180 questions| with complete solutions
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  • Course
  • Xray Physics
  • Institution
  • Life University

X-ray interaction with matter produces the whites in the image: CORRECT ANSWERS: Photoelectric absorption X-ray interaction causing "fog" in an image: CORRECT ANSWERS: Compton scatter X-ray interaction occurs at high kVp in the diagnostic range: CORRECT ANSWERS: Compton scatter X-ray in...

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  • February 6, 2023
  • 10
  • 2022/2023
  • Exam (elaborations)
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  • xray physics exam 2| 180 questions| with complete solutions

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  • Xray Physics
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Xray Physics exam 2| 180 questions| with
complete solutions
X-ray interaction with matter produces the whites in the image: CORRECT ANSWERS:
Photoelectric absorption

X-ray interaction causing "fog" in an image: CORRECT ANSWERS: Compton scatter

X-ray interaction occurs at high kVp in the diagnostic range: CORRECT ANSWERS: Compton
scatter

X-ray interaction decreased image contrast: CORRECT ANSWERS: Compton scatter

Radiation bouncing erratically off patient: CORRECT ANSWERS: Scatter

Radiation hitting image receptor: CORRECT ANSWERS: Remnant

Reduced fog, increased contrast is the goal for: CORRECT ANSWERS: Scatter control

Most effective scatter control device: CORRECT ANSWERS: Grids

Optimum range of kVp for spine imaging: CORRECT ANSWERS: 70-90 kVp

Optimum range of kVp for extremity imaging: CORRECT ANSWERS: 50-60 kVp

Scattered radiation is directly proportional to part thickness.

True/False CORRECT ANSWERS: True

Compressive techniques effect on mAs: CORRECT ANSWERS: Decreased mAs

Exhibits less lumbar shape distortion: CORRECT ANSWERS: PA lumbar spine

Exhibits less lumbar size distortion: CORRECT ANSWERS: AP lumbar spine

3 types of beam-restricting devices: CORRECT ANSWERS: Aperture diaphragm,
cones/cylinders, variable aperture collimator

Best x-ray restrictor: CORRECT ANSWERS: Collimator

Defines size and shape of x-ray field: CORRECT ANSWERS: Collimator

2 sets of shutters on collimator: CORRECT ANSWERS: Longitudinal and transverse

X-ray field area and collimated area relationship: CORRECT ANSWERS: Inverse

, Decreases amount of tissue for interaction which decreases compton scatter: CORRECT
ANSWERS: Decreased x-ray field area/ increased collimated area

Decreases amount of tissue for interaction, which also causes decreased overall density to film:
CORRECT ANSWERS: Decreased x-ray field area

When collimating significantly smaller area mAs: CORRECT ANSWERS: Increased 50-100%
(2x)

When collimating from 14x17 area to 10x12 area: CORRECT ANSWERS: Increase mAs 50%

AP lumbar spine using 40 mAs, 73 kVp on 14x17 film. 4x4 spot view required, new exposure
factors: CORRECT ANSWERS: 80 mAs, 73 kVp

AIR GAP: CORRECT ANSWERS: Increased OID

Decreases scatter but increases magnifcation: CORRECT ANSWERS: AIR GAP (increased
OID)

Affected with increased OID: CORRECT ANSWERS: Increased mAs at 10% per cm of air gap

6 cm air gap: CORRECT ANSWERS: Increase mAs 50%

10-15 cm air gap: CORRECT ANSWERS: Increase mAs 100% (2x)

An image with no OID requires 20 mAs, when there's a 6" OID mAs: CORRECT ANSWERS:
30 mAs

2 of the most important elements used to create superior image: CORRECT ANSWERS:
Contrast and image detail

X-ray interaction with matter producing whites in the image: CORRECT ANSWERS:
Photoelectric absorption

X-ray beam energy below 60 kVp: CORRECT ANSWERS: Photoelectric

Higher kVP: CORRECT ANSWERS: Compton scatter increased

10 cm or greater thickness: CORRECT ANSWERS: More compton scatter

Wider or longer area/field of exposure: CORRECT ANSWERS: More area for interaction

X-ray interaction occurring at high kVp in diagnostic range: CORRECT ANSWERS: Compton
scatter

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