Non-Surgical Treatment Relieves Carpal Tunnel Syndrome (IMAGE) Radiological Society of North America Caption Ultrasound image of median nerve before and after hydrodissection procedure in a patient with carpal tunnel syndrome. This case had cross-sectional area of 12 mm2 pre-procedure that reduced to 7 mm2 post-procedure (dashed yellow lines depicting the 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.