Abstract #3081

Phase-based T2 mapping using RF phase-modulated dual echo steady-state (DESS) imaging

Daiki Tamada¹ and Scott B. Reeder^1,2,3,4,5

¹Radiology, University of Wisconsin-Madison, Madison, WI, United States, ²Medical Physics, University of Wisconsin-Madison, Madison, WI, United States, ³Biomedical Engineering, University of Wisconsin-Madison, Madison, WI, United States, ⁴Medicine, University of Wisconsin-Madison, Madison, WI, United States, ⁵Emergency Medicine, University of Wisconsin-Madison, Madison, WI, United States

A novel T2 mapping method is proposed using RF-phase modulated dual echo steady-state sequence (DESS). T2 information is encoded into the phase of the DESS signals by using a small RF phase increment. T2 value is estimated from the phase difference between the FISP and PSIF signal of the DESS acquisition. Phantom studies demonstrated that estimated T2 using the proposed method agrees closely with spin-echo-based T2 mapping, and volunteer studies demonstrate the feasibility of the proposed method in vivo. These results suggested that the proposed method enables fast and three-dimensional T2 mapping with a single acquisition.

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