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Abstract #1844

Prospective Motion Correction in Diffusion Tensor Imaging using Intermediate Pseudo-Trace-Weighted Images

Daniel Christopher Hoinkiss1, Matthias Guenther1, and David Andrew Porter1

1MR Physics, Fraunhofer MEVIS, Bremen, Germany

Diffusion Tensor Imaging is frequently affected by long-term subject motion. Intermediate pseudo-trace-weighted images enable a real-time image registration with low sensitivity to contrast variation between diffusion-weighted images. These registration results are used to correct the imaging parameters of the ongoing scan. The algorithm was evaluated on three individual subjects using a dedicated diffusion-weighted imaging sequence. The prospective motion correction was able to reduce the typical long-term motion to a band of approximately ±0.2mm for translational and ±0.2° for rotational motion, which is far below voxel size, without increasing the total scan time or changing the set of diffusion vectors.

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