A head swivel technique for breast tangents

Two of the major problems with treating breast tangents are the difficulties in simulating the treatment and the reproducibility of the setup on a day to day basis. This paper describes a simple technique which takes advantage of the head swivel capability of certain cobalt-60 units to allow simulation and treatment of the breast and chest wall based upon a setup at the field edges which are normally not on mobile breast tissue. The technique offers some of the advantages of half block techniques but does not require the use of half blocks or bridges