[The intraoperative irradiation of tumors].

Intraoperative irradiation of tumor was performed in 40 patients with cancer of the lung, stomach, breast, bone and soft tissues. It included irradiation of the bed of tumor removed. Fast electron beam was produced by a small betatron (collimator size--5 x 6 cm and 8 x 12 cm) installed in the operating room.

[Small-size betatron for electron therapy of surface tumors and its clinical evaluation].

The paper is concerned with the physicotechnical characteristics of a small-size betatron (with the energy of 7 MeV) designed in the Tomsk Polytechnical Institute for therapy of patients with superficial malignant tumors. An electron beam with the energy of 7 MeV was produced on the small-size betatron, irradiation fields were formed, and absorbed dose distribution was studied. The efficacy of the use of the beam in 110 patients with superficial malignant tumors was analyzed.