Abstract #3260

Optimization of High-Resolution Slice-Accelerated Inversion Recovery T1 Mapping at 7T

John Grinstead¹, Valerie Anderson², Manoj Sammi², and William Rooney²

¹Siemens Healthcare, Portland, OR, United States, ²Oregon Health & Science University, Portland, OR, United States

Parametric T₁ mapping using inversion recovery has competing requirements for speed, SNR, spatial resolution, anatomical coverage, and adequate sampling of the longitudinal magnetization recovery. Potential sources of slice-to-slice variability in quantitative T₁ maps are investigated, including slice cross talk due to imperfect slice profiles, and the range of TIs used to fit each slice. It is demonstrated that T₁ relaxometry benefits significantly from slice acceleration techniques in not only scan time & slice coverage, but in its ability to reduce quantitative errors by allowing the same TI sampling across all slices.

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