Abstract #1540

T2* quantitation with chemical shift and multi-echo spiral imaging

Atsushi M Takahashi¹

¹McGovern Institute for Brain Research, Massachusetts Institute of Technology, Cambridge, MA, United States

Quantitation of T₂* with spiral imaging sequences can be made in two distinct ways: Collecting data at various echo-times results in a measurement of the chemical shift after Fourier transformation along the echo-time dimension. Off resonance is intrinsically corrected by this processing. Alternately, multiple-echo spiral imaging can be used to quantitatively measure T2* as long as dephasing from B₀ distortion is small over the duration of the spiral readout. Multiple spiral interleaves are used to reduce the readout time of the spiral. Both methods are demonstrated.

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