Skobeltsyn Institute of Nuclear Physics
Lomonosov Moscow State University

We compared opportunities and results of spread-out Bragg peak estimation using analytical
methods. Convolution method is convenient for obtaining depth-dose distribution for protons
with widened flat peak. The other analytical method is concerned with direct solving of
inverse problem of dosimetry planning. 1st type Volterra integral equation solution processes
a solution for a dose maximum peak of any given shape. Proposed is a method of taking into
consideration of biological effectiveness.
Supported by the Grant НШ-1619.2003.2 from the President of the Russian Federation.