[Choice of the geometric parameters in optimizing the irradiation of patients with malignant neoplasms].
The authors have devised an algorithm and made a program of 2-stage optimization of irradiation conditions. At the 1st stage geometric parameters of irradiation are selected (field sizes, their number, a tangential shift of the field axis) proceeding from the peculiarities of the position of tumors, vital organs and tissues in space in respect to a source for each irradiation direction. Dose optimization is done at the 2nd stage. Doses are calculated on the basis of empirical expressions for the distribution of a dose of single gamma- and inhibition radiation beams up to 42 MEV Tissue inhomogeneity and surface curvature are taken into consideration by means of corrections.
D003201:Computers; D006801:Humans; D008433:Mathematics; D009369:Neoplasms / Q000532:radiotherapy*; D010315:Particle Accelerators; D011879:Radiotherapy Dosage; D011882:Radiotherapy, High-Energy / Q000379:methods; D012984:Software
Vybor geometricheskikh parametrov v optimizatsii oblucheniia bol'nykh so zlokachestvennymi novoobrazovaniiami.