ST BARTHOLOMEW'S HOSPITAL, LONDON / SCIENCE PHOTO LIBRARY ST BARTHOLOMEW'S HOSPITAL, LONDON / SCIENCE PHOTO LIBRARY
Woman undergoing a brain scan using a low-field nuclear magnetic resonance (NMR) scanner. The M&D 800 scanner is installed at the Magnetic Resonance Unit in the Department of Academic Radiology at St. Bartholomew's Hospital, London, where it is used for clinical research. NMR provides images of the body without relying on potentially harmful ionising radiations. The technique is based on measuring the radio-response of atoms (or protons) in different tissue environments subjected to a uniform magnetic field when the influence of the magnetic field is periodically interrupted by brief bursts of radio-waves.
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