Abstract #3672

Improved Temperature Reconstruction for Multiple-Echo SPGR

Michael Marx ¹ and Kim Butts Pauly ²

¹ Electrical Engineering, Stanford University, Stanford, California, United States, ² Radiology, Stanford University, Stanford, CA, United States

Multiple-echo 2DFT SPGR was implemented for temperature monitoring, and compared with single-echo SPGR. It was found that performing a weighted average of individual echo temperature measurements gave significantly better temperature uncertainty than using least squares linear fitting to find B0 for each time point. Using the weighted average approach, combined temperature uncertainty matched expectations for a single readout of the same duration, and was close to achieving the upper bound on performance found by analyzing each echos uncertainty.

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