TY JOUR TI Ultrasound Sonography and Magnetic Resonance Imaging in the Detection of Degenerative Changes of X-Ray Negative Osteoarthritis of the Knee KW osteoathritis KW magnetic resonance imaging KW ultrasound examination KW knee joints JO Journal of New Medical Technologies. eJournal AU Yakobi, A.. AU Yunitsyna, A.. AU Agapitov, A.. AU Makarova, M.. AU Valkov, M.. PY 2014 IS 8 PB INFRA-M Academic Publishing LLC.