New Studies Sharpen the Focus of MRI (image) American Association for the Advancement of Science Share Print E-Mail Caption This shows a false-color fluorescence image of a diamond surface. The small dark circular spots show nitrogen-vacancy (NV) centers that can be used as atomic-size detectors of magnetic fields. Individual NV centers are used to detect the weak magnetic fields emanating from the nuclei of hydrogen atoms in an organic sample. The vertical stripe is a microfabricated wire that transmits electromagnetic signals used to manipulate the NV centers and the hydrogen nuclei. The NV centers allow detection of magnetic resonance (the basis of MRI) in nanoscopic regions of the organic sample. This image relates to a paper that appeared in the Feb. 1, 2013, issue of Science, published by AAAS. The paper, by John Mamin at IBM Almaden Research Center in San Jose, Calif., and colleagues was titled, "Nanoscale Nuclear Magnetic Resonance with a Nitrogen-Vacancy Spin Sensor." Credit [Image courtesy of Courtesy of IBM Research] Usage Restrictions Please cite the owner of the image when publishing. This image may be freely used by reporters as part of news coverage, with proper attribution. Non-reporters must contact Science for permission. 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.