Abstract #4190

Segmented 3D EPI with CAIPIRINHA for Fast, High-Resolution T2*-weighted Imaging

Jin Jin^1,2, Monique Tourell², Pascal Sati³, Sunil Patil⁴, Kecheng Liu⁵, John Derbyshire⁶, Fei Han⁷, Saskia Bollmann², Simon Robinson², Josef Pfeuffer⁸, Steffen Bollmann², Markus Barth², and Kieran O'Brien¹

¹Siemens Healthcare, Brisbane, Australia, ²The University of Queensland, Brisbane, Australia, ³Cedars-Sinai Medical Center, Los Angeles, CA, United States, ⁴Siemens Medical Solutions USA, Baltimore, MD, United States, ⁵Siemens Medical Solutions USA, Baltimore, OH, United States, ⁶National Institute of Mental Health, Bethesda, MD, United States, ⁷Siemens Medical Solutions USA, Los Angeles, CA, United States, ⁸Siemens Healthcare, Sydney, Australia

In this work, a highly accelerated 3D EPI prototype sequence implementation and scanner in-line reconstruction are introduced. The proposed sequence provides a flexible combination of single-/multi-shot schemes, in-plane segmentation, image resolution, echo-train length, partial Fourier factors, 2D-CAIPIRINHA/2D-GRAPPA-based acceleration, and CAIPIRINHA shift. Initial tests presented herein indicate suitability for highly accelerated high-resolution susceptibility-based imaging with significantly reduced scan time, such as whole-head coverage at 0.65 mm isotropic resolution within 2 minutes.

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