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Abstract #1770

Fat-Referenced MR Thermometry using 3-Echo Phase-Based Fat Water Separation Method

Lorne Hofstetter1, Desmond Yeo1, W. Thomas Dixon1, Cynthia Davis1, Thomas K. Foo1

1GE Global Research, Niskayuna, NY, United States

Accurate and stable MR thermometry is critical for interventional procedures such as RF hyperthermia and MR guided focused ultrasound therapy. In this work we present a 3-echo fat-referenced thermometry technique that reduces measurement error caused by time-varying changes in the underlying B0 field. This technique was validated in a cream cooling experiment (δT = 8.4C) where deviations between MR and fiber-optic temperature probe measurements were less than 0.28C.