A system for open-access He-3 human lung imaging at very low field
We describe a prototype system built to allow open-access very-low-field MRI of human lungs using laser-polarized He-3 gas. The system employs an open four-coil electromagnet with an operational B-o held of 4 mT, and planar gradient coils that generate gradient fields up to 0.18 G/cm in the x and y direction and 0.41 C/cm in the z direction. This system was used to obtain H-1 and He-3 phantom images and supine and upright He-3 images of human lungs. We include discussion on challenges unique to imaging at 50-200 kHz, including noise filtering and compensation for narrow-bandwidth coils. (C) 2006 Wiley Periodicals, Inc.
Concepts in Magnetic Resonance Part B-Magnetic Resonance Engineering
JOHN WILEY & SONS INC
Digital Object Identifier (DOI)
Ruset, I. C.; Tsai, L. L.; Mair, R. W.; Patz, S.; Hrovat, M. I.; Rosen, M. S.; Muradian, I.; Ng, J; Tolupos, G. P.; Butler, J. P.; Walsworth, R. L.; and Hersman, F. W., "A system for open-access He-3 human lung imaging at very low field" (2006). Concepts in Magnetic Resonance Part B-Magnetic Resonance Engineering. 44.
© 2006 Wiley Periodicals, Inc. *This article is a US Government work and, as such, is in the public domain in the United States of America."