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Abstract #0941

3D-Yarnball Acquisition and Reconstruction Advancement Yields High Resolution T1-Weighted Whole Brain Images in Just Over 1 Minute

Rob Stobbe1, Corey Baron2, and Christian Beaulieu1
1University of Alberta, Edmonton, AB, Canada, 2Western University, London, ON, Canada

Synopsis

Keywords: Data Acquisition, Data Acquisition

Motivation: This study is motivated by the creation of high-resolution T1-weighting whole brain images in considerably less time (1 minute) than currently required for standard MP-RAGE (~4 minutes).

Goal(s): The sampling efficient 3D-Yarnball trajectory offers a potential imaging solution, but trajectory/sequence design and reconstruction aspects remain to be explored.

Approach: Variably under-sampled Yarnball trajectories with 2-10 ms duration were compared in healthy brain, along with different methods of steady-state sequence excitation. Iterative, off-resonance correcting, wavelet-regularized reconstruction was applied to Yarnball for the first time.

Results: Yarnball sequence and reconstruction consideration enabled high-quality 0.77 mm isotropic whole brain images in 1 minute

Impact: The image acquisition, sequence, and reconstruction investigation of this work enabled robust, high-quality 0.77 mm isotropic T1-weighted whole brain images in just over 1 minute. The goal of this work is to facilitate considerably shorter MRI protocols.

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Keywords