Liquids Scanner Schematic (IMAGE) University of California - Davis Caption In this sketch, a sample is loaded into the top of the machine where there is a strong magnetic field. Radio waves are used to scan the sample and the results are fed to a computer. Credit Jan Conroy/UC Davis Usage Restrictions May be used with credit. License Licensed 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.