TY JOUR TI Monitoring the Therapy of Osteosarcoma Metastases with SPECT/CT KW SPECT/CT KW bone scan KW osteosarcoma KW CyberKnife KW HIFU JO Medical Radiology and radiation safety AU Ryzhkov, A.D. AU Krylov, A.S. AU Machak, G.N. AU Kaspshik, S.M. AU Bludov, A.B. AU Schipahina, Y.A. AU Kochergina, N.V. PY 2019 IS 64 PB Federal Medical Biological Agency of Russia