Outcome 10

Question 1

what are sources of x-ray exposure?

Answer 1

primary beam
leakage from the tube
scatter by patient

Question 2

penetrating power of the photons coming from the X-ray tube

Answer 2

kVp (peak kilovoltage)

Question 3

selects the maximum possible energy of the x-ray beam

Answer 3

kVp (peak kilo voltage)

Question 4

increasing kVp doesn’t increase your dose. t/f

Answer 4

false.
increasing kVp increases dose

Question 5

determines the quantity of photons that will fall upon the patient

Answer 5

mAs (milliamerage seconds)

Question 6

number of photons produced by the x-ray tube

Answer 6

mAs (milliamerage seconds)

Question 7

mA influences the contrast of an image t/f

Answer 7

true

Question 8

what does the x-ray filter do?

Answer 8

filters out the low energy x-rays that don’t have enough energy to pass through the patient
- shapes the x-ray beam as well

Question 9

what is collimation?

Answer 9

• it is used to restrict the region being examined
• limits the beam size
• pre and post collimations

Question 10

what are scout scans?

Answer 10

low energy planar scans that determine the area that will be imaged (not for diagnosis)
- low kVp and mA settings