Preliminary results for prone-position breast irradiation.

Purpose: To evaluate an alternative prone-position technique for breast irradiation after conservative surgery.

Methods And Materials: A plexiglas platform with a circular opening for the breast and a double 30 degrees craniocaudal and 10 degrees transverse (left-right for the right breast and right-left for the left breast) slope was evaluated for positioning, the possible use of CT, and dosimetric study in 35 patients with large pendulous breasts who were likely to benefit from irradiation of the breast alone after conservative surgery.

Results: The positioning was excellent for all but 3 obese patients who could not achieve adequate prolonged immobilization.