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    Radiation Therapy Study Set 1
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    Exam 24: Photon Dosimetry Concepts and Calculations
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    Find the PDD at 3
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Find the PDD at 3

Question 20

Question 20

Multiple Choice

Find the PDD at 3.5 cm of an 18-MV beam of radiation that has a 23 x 15 cm treatment field.


A) 99.8 %
B) 98 %
C) 100 %
D) 98.8 %

Correct Answer:

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