Non-Surgical Treatment Relieves Carpal Tunnel Syndrome (IMAGE) Radiological Society of North America Caption Ultrasound images depicting hydrodissection procedure in a patient with carpal tunnel syndrome. (A) Needle placed below the median nerve with fluid dissecting the nerve from the underlying flexor tendons (green star). (B) Needle placed above the median nerve with fluid dissecting the nerve away from the flexor retinaculum (yellow star). (C) Image at completion of procedure depicting the dissected median nerve with fluid all around. Red Arrow - needle, Blue cross -hydrodissection fluid, white dashed lines - median nerve. Credit RSNA and Anindita Bose, M.B.B.S., M.D. Usage Restrictions May use with credit. License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.