81. The answer is a.

Early-stage Hodgkin disease and some skin cancers are often treated with radiation alone. CNPP, Page 269.

82. The answer is a.

An indirect hit occurs when ionization takes place in the medium surrounding the molecular structures in the cell causing free radical formation. The free radical knocks the electrons out of orbit, triggering a variety of chemical reactions, all destructive to the tumor. CNPP, Pages 272–273.

83. The answer is a.

The term used to describe the treatment approach that takes the total dose of radiation and divides it into equal portions is fractionation. Hyperfractionation uses smaller doses per fraction and delivers a dose twice a day. CNPP, Pages 274–275.

84. The answer is a.

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