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Abstract #3622

Segmented thick-slab 3D DWI with first and second order motion-compensated diffusion gradients

Jens Johansson1, Kerstin Lagerstrand2,3, Hanna Hebelka1,4, and Stephan E Maier1,5
1Radiology, Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden, 2Medical Radiation Sciences, Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden, 3Medical Physics and Biomedical Engineering, Sahlgrenska University Hospital, Gothenburg, Sweden, 4Radiology, Sahlgrenska University Hospital, Gothenburg, Sweden, 5Radiology, Brigham and women's hospital, Boston, MA, United States

Synopsis

Keywords: Data Acquisition, Diffusion/other diffusion imaging techniques, Motion correction, 3D imagingRoutine clinical diffusion imaging is generally performed with 2D echo planar sequences. A single thick-slab 3D approach could offer higher signal-to-noise ratio and better slice resolution, but has not been adopted due to the difficulty to avoid motion-induced phase errors that interfere with multi-shot spatial encoding. A new approach to enable 3D DWI is introduced here: rather than relying on navigator echoes for phase correction, first and second order motion-compensated diffusion encoding gradients are used to minimize phase variations at the source.

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