The TBI method preceding BMT at Innsbruck University Clinic for radiation therapy.

Thirteen TBIs have been performed prior to allogenic or autologous bone-marrow transplants in Innsbruck since August 1983 using a Linac (SL 75/20). Irradiation takes place from two lateral opposing fields with the patient lying in a dorsal position on a special couch on the wall (FSD = 350 cm). The mean dose of 10 Gy is administered during a single session. The patient's upper arms partially shield the lungs. The Linac's PRF is set to prevent the maximum dose rate in the lung from exceeding 0.10 Gy/min. Distribution of the dose in the patient is measured by means of TLD and semiconductor detectors.