With high-energy treatment units,compensators may be preferred over bolus because

Question

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Patients rarely have a flat surface parallel with a beam of radiation.Skewing of dose distribution caused by irregular surfaces can be compensated by using bolus material to produce a level treatment area; however,a loss of skin sparing accompanies this technique.To retain this important effect,compensating filters may be positioned in the head of the treatment unit,thus modifying the radiation beam to accommodate the contour of the patient.

With High-Energy Treatment Units,compensators May Be Preferred Over Bolus Because