NMR probes for measuring magnetic fields and field dynamics in MR systems Export

@article{DeZanche2008, abstract = {High-resolution magnetic field probes based on pulsed liquid-state NMR are presented. Static field measurements with an error of 10 nanotesla or less at 3 tesla are readily obtained in 100 ms. The further ability to measure dynamic magnetic fields results from using small (sim1 muL) droplets of MR-active liquid surrounded by susceptibility-matched materials. The consequent high field homogeneity allows free induction decay signals lasting 100 ms or more to be readily achieved. The small droplet dimensions allow the magnetic field to be measured even in the presence of large gradients. Highly sensitive detection yields sufficient SNR to follow the relevant field evolution without signal averaging and at bandwidths up to hundreds of kHz. Transient, nonreproducible effects and drifts are thus readily monitored. The typical application of k-space trajectory mapping has been demonstrated. Potential further applications include characterization, tuning, and maintenance of gradient systems as well as the mapping of the static field distribution of MRI magnets. Connection of the probes to a standard MR spectrometer is similar to that used for imaging coils. Magn Reson Med 60:176-186, 2008. {\copyright} 2008 Wiley-Liss, Inc.}, address = {Institute for Biomedical Engineering, ETH Zurich and University of Zurich, Zurich, Switzerland}, author = {De Zanche, Nicola and Barmet, Christoph and Nordmeyer-Massner, Jurek A. and Pruessmann, Klaas P.}, citeulike-article-id = {3199463}, citeulike-linkout-0 = {http://dx.doi.org/10.1002/mrm.21624}, citeulike-linkout-1 = {http://www3.interscience.wiley.com/cgi-bin/abstract/120173568/ABSTRACT}, doi = {10.1002/mrm.21624}, journal = {Magnetic Resonance in Medicine}, keywords = {2008, ibt, magnetic-field-monitoring, mrm}, number = {1}, pages = {176--186}, posted-at = {2008-09-06 11:14:02}, priority = {2}, title = {NMR probes for measuring magnetic fields and field dynamics in MR systems}, url = {http://dx.doi.org/10.1002/mrm.21624}, volume = {60}, year = {2008} }

TY - JOUR ID - DeZanche2008 L3 - citeulike-article-id:3199463 N2 - High-resolution magnetic field probes based on pulsed liquid-state NMR are presented. Static field measurements with an error of 10 nanotesla or less at 3 tesla are readily obtained in 100 ms. The further ability to measure dynamic magnetic fields results from using small (sim1 muL) droplets of MR-active liquid surrounded by susceptibility-matched materials. The consequent high field homogeneity allows free induction decay signals lasting 100 ms or more to be readily achieved. The small droplet dimensions allow the magnetic field to be measured even in the presence of large gradients. Highly sensitive detection yields sufficient SNR to follow the relevant field evolution without signal averaging and at bandwidths up to hundreds of kHz. Transient, nonreproducible effects and drifts are thus readily monitored. The typical application of k-space trajectory mapping has been demonstrated. Potential further applications include characterization, tuning, and maintenance of gradient systems as well as the mapping of the static field distribution of MRI magnets. Connection of the probes to a standard MR spectrometer is similar to that used for imaging coils. Magn Reson Med 60:176-186, 2008. © 2008 Wiley-Liss, Inc. IS - 1 JF - Magnetic Resonance in Medicine AD - Institute for Biomedical Engineering, ETH Zurich and University of Zurich, Zurich, Switzerland EP - 186 TI - NMR probes for measuring magnetic fields and field dynamics in MR systems VL - 60 SP - 176 KW - 2008 KW - ibt KW - magnetic-field-monitoring KW - mrm AU - De Zanche, Nicola AU - Barmet, Christoph AU - Nordmeyer-Massner, Jurek AU - Pruessmann, Klaas PY - 2008/// UR - http://dx.doi.org/10.1002/mrm.21624 ER -