[Ultrasonic hyperthermia during radiotherapy of experimental tumors].

The paper is devoted to the development of an experimental device and methods for controlled ultrasound hyperthermia of animal tumors and to the estimation of a radiomodifying effect of ultrasound hyperthermia in radiation therapy of neoplasms as compared to the effect achieved in a water bath. Experiments were staged on mice with transplantable Ehrlich's carcinoma. Marked and approximately equal in value enhancement of radiation action on malignant tumors with the DMF of ionizing radiation of 1.3-1.4 was obtained with both methods of tumor heating (ultrasound and in a water bath). The results obtained indicate the advisability of a practical use of ultrasound heating in radiation therapy of tumors.