TY JOUR TI Experience of Proton Radiotherapy at the Joint Institute for Nuclear Research, Dubna KW proton therapy KW synchrocyclotron KW 3-D conformal radiotherapy KW boluses KW aperture collimators KW brain KW head and neck tumours KW JINR KW Dubna JO Medical Radiology and radiation safety AU Agapov, A.V. AU Gaevsky, V.N. AU Kizhaev, E.V. AU Kurgansky, Y.V. AU Luchin, E.I. AU Mitsyn, G.V. AU Molokanov, A.G. AU Tseytlina, M.A. AU Shvidkiy, S.V. AU Shipulin, K.N. PY 2019 IS 64 PB Federal Medical Biological Agency of Russia