PET Images (image) Society of Nuclear Medicine Share Print E-Mail Caption Strong signals are detected at the sites where inserted catheters had roughened surfaces. Almost no other background signal is visible. Only accumulation in the gallbladder becomes visible at the bottom of the image. Credit Piramal Imaging GmbH, Berlin Germany Usage Restrictions Please use at least title and credit 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.