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Mc?
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The textbook used in an x-ray physics class states that:
1) The probability of compton interactions occurring in tissue decreases with increasing photon energy (1/e)
2) The probablity of Photoelectric (PE) interactions occurring in tissue decreases with increasing photon energy by 1/e cubed.
3) The number of compton interactions relative to PE increases with increasing photon energy based on the relationship of 1/e to 1/e cubed
The author then gives a table that list the percentages of compton and PE interactions at various kVp settings that states:
a) At 50 kVp, >99% of the photons are absorbed and 21% of the interactions are compton
b) At 100 kVp, 96% of the photons are absorbed and 63% of the interactions are compton
Based on the information in the table it appears the actual number of Compton interactions will increase with an increase in photon energy.
100 Photons produced @ 50 kVp - 99% absorbed and 1 transmitted - 20.8 Compton (21% of 99)
100 photons produced @ 100 kVp - 94 absorbed and 6 transmitted - 59 Compton (63% of 94)
What does increasing photon energy do to the actual number of compton interaction occurring in tissue?
Thank you.
Mc?
1) The probability of compton interactions occurring in tissue decreases with increasing photon energy (1/e)
2) The probablity of Photoelectric (PE) interactions occurring in tissue decreases with increasing photon energy by 1/e cubed.
3) The number of compton interactions relative to PE increases with increasing photon energy based on the relationship of 1/e to 1/e cubed
The author then gives a table that list the percentages of compton and PE interactions at various kVp settings that states:
a) At 50 kVp, >99% of the photons are absorbed and 21% of the interactions are compton
b) At 100 kVp, 96% of the photons are absorbed and 63% of the interactions are compton
Based on the information in the table it appears the actual number of Compton interactions will increase with an increase in photon energy.
100 Photons produced @ 50 kVp - 99% absorbed and 1 transmitted - 20.8 Compton (21% of 99)
100 photons produced @ 100 kVp - 94 absorbed and 6 transmitted - 59 Compton (63% of 94)
What does increasing photon energy do to the actual number of compton interaction occurring in tissue?
Thank you.
Mc?