Brain (image) UT Southwestern Medical Center Share Print E-Mail Caption Diffusion tractography uses the movement of water molecules to identify tracts that connect different parts of the brain. It can be used to pinpoint the part of the thalamus to treat with focused ultrasound. Credit UT Southwestern Medical Center Usage Restrictions None Share Print E-Mail 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.