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- Oct 30, 2007
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Could anyone plz explain how?
1. Using B speed film exposure to the patient at 3feet is 1 Roentgen. What would the exposure be with D speed film at 6 feet? (All other exposure factors are same).
A. 1/8 R (ANS)
B. 1/4 R
c. 1/2 R
D. 3/4 R
2. Absorption of photons produced by a100 kVp x ray machineoperating at maximum output is primarily by
1. photo electric effect only
2. compton effect only
3.75% photoelectric and 25% compton
4.50% photoelectric and 50% compton (ANS)
Thank you.
1. Using B speed film exposure to the patient at 3feet is 1 Roentgen. What would the exposure be with D speed film at 6 feet? (All other exposure factors are same).
A. 1/8 R (ANS)
B. 1/4 R
c. 1/2 R
D. 3/4 R
2. Absorption of photons produced by a100 kVp x ray machineoperating at maximum output is primarily by
1. photo electric effect only
2. compton effect only
3.75% photoelectric and 25% compton
4.50% photoelectric and 50% compton (ANS)
Thank you.
