Matchline dosimetry of half beam technique at fixed SSD using Co-60 and 4 MV photons in the treatment of head and neck tumors

Abstract

The problem of beam divergence and overlapping of adjacent fields in the conventional treatment of cancer of the head and neck is well known. The use half beam technique has been suggested as one way of solving this problem. This work reports a matchline dosimetry of this technique using Co-60 beam and 4 MV photons beam and fixed SSD technique.