Which of the following is NOT a source of energy for external radiation therapy?
A.
beta
B.
x-ray
C.
gamma
D.
proton
BETA is NOT a source of energy for external radiation therapy.
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Asked 5/8/2014 7:56:45 AM
Updated 2/14/2016 11:40:33 AM
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Janet17 [2/14/2016 11:40:31 AM], Confirmed by
Janet17 [2/14/2016 11:40:33 AM]
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