Title :
Feasibility of a low-field MR imager using hyperpolarized 129 Xe
Author :
McDonald, Mark ; Cross, Albert ; Santyr, G.
Author_Institution :
Dept. of Phys., Carleton Univ., Ottawa, Ont., Canada
Abstract :
Low-field MRI is a less expensive and more flexible alternative to high-field proton MRI. T1 measurements of hyperpolarized 129Xe (H-Xe) were made at 85 Gauss using a 100 kHz homemade spectrometer in the fringe field of a 1.89 Tesla superconducting magnet. T1 was measured in the range of 400-800s with a SNR of 11±1. These T1 values indicate that a low-field MR imaging system may be feasible
Keywords :
NMR spectrometers; biomedical MRI; biomedical equipment; dynamic nuclear polarisation; nuclear spin-lattice relaxation; optical pumping; 1.89 T; 100 kHz; coil construction; fringe field measurements; hyperpolarized 129Xe; low-field MRI imager; spin-lattice relaxation measurement; split solenoid; superconducting magnet field; Coils; Gaussian processes; Magnetic field measurement; Magnetic resonance imaging; Magnetization; Nuclear magnetic resonance; Oscilloscopes; Spectroscopy; Superconducting magnets; Xenon;
Conference_Titel :
Engineering in Medicine and Biology Society, 2000. Proceedings of the 22nd Annual International Conference of the IEEE
Conference_Location :
Chicago, IL
Print_ISBN :
0-7803-6465-1
DOI :
10.1109/IEMBS.2000.901465
