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Abstract #4419

Correction of field drifting for single shot spiral diffusion imaging

Tzu Cheng Chao1, Daniel D. Borup2, and James G. Pipe1
1Department of Radiology, Mayo Clinic, Rochester, MN, United States, 2MR R&D, Royal Philips, Rochester, MN, United States

Synopsis

Keywords: System Imperfections: Measurement & Correction, Diffusion Tensor ImagingDiffusion MRI provides useful microstructural information of the soft tissue. Scans using a single-shot Spiral trajectory have demonstrated better geometric fidelity and SNR than those with a Cartesian EPI counterpart. This study shows that the field drifting during a diffusion scan can be a confounding factor to the image quality. A correction strategy exploiting the average off-resonance measurement before and after a scan was applied to mitigate the blurring artifact caused by field drifting.

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