title: [Clinical dosimetric studies of lung tissue heterogenetiy in irradiation on the Rokus and B5M-25 machines].
abstract: As a result of measurements of radiation doses in the esophagus and of the emerging beam, which were made immediately during radiotherapy, the coefficients of heterogeneity and values of the effective lung density were determined. In mobile telegamma therapy of esophageal tumors the correction for heterogeneity was 1.26 for the upper third of the thoracic esophagus (angula deviation 120 degrees) and 1.44--for the median third (240 degrees). A calculation method is suggested for the medium heterogeneity to be taken into account in individual planning of radiotherapy of the esophagus and lung tumors.
mesh_terms: D002986:Clinical Trials as Topic; D004307:Dose-Response Relationship, Radiation; D004938:Esophageal Neoplasms / Q000532:radiotherapy; D004947:Esophagus / Q000528:radiation effects; D005720:Gamma Rays / Q000627:therapeutic use; D006801:Humans; D008168:Lung / Q000528:radiation effects*; D008175:Lung Neoplasms / Q000532:radiotherapy; D011836:Radiation Tolerance; D011878:Radiotherapy / Q000295:instrumentation*; D011879:Radiotherapy Dosage; D011882:Radiotherapy, High-Energy
vernacular_title: Kliniko-dozimetricheskie issledovaniia neodnorodnosti legochnoĭ tkani pri obluchenii na ustanovkakh Rokus i B5M-25.