___________ occurs only at the very high energies used in radiation therapy and in nuclear medicine P.E.T. imaging.
A) Coherent scatter
B) Compton scatter
C) Photoelectric absorption
D) Pair production
Correct Answer:
Verified
Q15: The use of contrast agents increases the
Q16: Attenuation is caused by _.
A) absorption
B) scattering
C)
Q17: Differential absorption in diagnostic imaging is primarily
Q18: Because of differential absorption, about _% of
Q19: An incident x-ray interacts with an atom
Q21: X-rays transmitted without interaction contribute to _.
A)
Q22: If 5% of an incident beam is
Q23: High kVp techniques reduce _.
A) patient dose
B)
Q24: At energies below 40 keV, the predominant
Q25: Compton interactions, photoelectric absorption, and transmitted x-rays
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