TY JOUR TI Reconstruction of Bremsstrahlung Spectrum of Medical Electron Linear Accelerators from Deep Dose Distributions in Water Phantom KW radiation therapy KW medical accelerators KW bremsstrahlung KW deep dose distributions KW reconstruction of the photon spectrum JO Medical Radiology and radiation safety AU Klimanov, V.A. AU Galyautdinova, Z.Z. AU Mogilenec, N.N. AU Smirnov, V.V. PY 2017 IS 62 PB Federal Medical Biological Agency of Russia