Project FUSCLEAN (IMAGE) University of Seville Caption Selection of photograms from demo video (Video 2) demonstrating cavitation inside a hydrocephalus valve filled with water and graphite powder over. The graphite tracer at t = 0 is deposited on the lower wall of the valve in the absence of ultrasonic waves. The remaining photograms illustrate resuspension of the graphite particles within 1 second of ultrasonic radiation. Credit Universidad de Sevilla Usage Restrictions No restrictions. License Public Domain 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.