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Abstract #3733

Title: A Fast Algorithm to Correct Excitation Profile in Zero Echo Time (ZTE) Imaging

Cheng Li 1 , Jeremy F. Magland 1 , Alan C. Seifert 1 , and Felix W. Wehrli 1

1 Laboratory for Structural NMR Imaging, Department of Radiology, University of Pennsylvania, Philadelphia, PA, United States

Zero echo-time (ZTE) sequence is a promising technique for short-T2 imaging. However, the presence of an imaging gradient during excitation causes blurring and shadow artifacts due to limited RF pulse bandwidth. Our previous work proposed an approach by applying phase-modulated RF excitation and iterative reconstruction to correct the artifacts. However, this iterative method is computationally intensive. In this work, we developed a fast non-iterative correction algorithm to dramatically reduce the computation time while maintaining image quality. Results from phantom and in vivo scans demonstrate the effectiveness of the method. The proposed method allows online ZTE reconstruction with artifact correction on clinical scanners.

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