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Abstract #2781

Simultaneous Dual-Nuclear 31P/1H MRS at a Clinical MRI System with Time-Sharing Second RF Channel

Eun-Kee Jeong1, 2, Nabraj Sapkota3, Joshua Kaggie3, Xian-Feng Shi4

1Radiology, University of Utah, Salt Lake City, UT, United States; 2Utah Center for Advanced Imaging Research, University of Utah, Salt Lake City, UT, United States; 3Dept. of Physics, University of Utah, Salt Lake City, UT, United States; 4Dept. of Psychiatry, University of Utah, Salt Lake City, UT, United States

This work presents a novel acquisition method that simultaneous measures both 31P and 1H MR spectroscopies at the exactly same sampling window within the same acquisition, at a clinical MRI system that is equipped with a time-sharing second RF channel. The high frequency 1H NMR signal is down-converted to the carrier 31P frequency, using additional RF components, which includes PIN-diode driven RF switches, preamplifier for 1H frequency, a precision synthesizer, a mixer, and low-pass filter, and measured at one of the 31P receive channels. The residual water signal is used to identify and correct the phase-error on both 1H and 31P spectra. Pulse sequence manipulates both spin systems within the same acquisition using time-shared RF transmission.

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Keywords

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