Imaging of Muscle Injuries: MR Imaging-Ultrasound Correlation Peripheral Nerve Imaging: Magnetic Resonance and Ultrasound Correlation Sarcoma Imaging Surveillance: MR Imaging-Ultrasound (US) Correlation Pain After Hip Arthroplasty: MR Imaging/Ultrasound Correlation Spectrum of Hand Arthritis: Doppler Ultrasound, Diffusion-Weighted MR Imaging, and Perfusion MR Imaging Evaluation Brachial Plexus Nerve Injuries and Disorders: MR Imaging-Ultrasound Correlation Acute and Chronic Elbow Disorders: MR Imaging-Ultrasonography Correlation Musculoskeletal Soft-tissue Masses: MR imaging-Ultrasonography Correlation, with an Emphasis on the 2020 World Health Organization Classification Imaging of Rheumatological Disorders MR Imaging-Ultrasonography Correlation of Acute and Chronic Foot and Ankle Conditions