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Abstract #0818

Correction of Excitation Profile in Zero Echo Time (ZTE) Imaging Using Quadratic Phase-Modulated RF Pulse Excitation and Iterative Reconstruction

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

1 Radiology, University of Pennsylvania, Philadelphia, PA, United States

Zero-echo Time (ZTE) imaging is a promising technique for detecting short-T2 nuclei. However, a well-known problem with ZTE imaging is the presence of a spatial encoding gradient during excitation causing the hard pulse to become spatially selective, resulting in blurring and shadow artifacts. In this work, an approach is proposed to correct the artifacts by applying quadratic phase-modulated RF excitation and iterative reconstruction. Results from simulations and in vivo studies demonstrate the effectiveness of the method. The proposed method may contribute toward establishing ZTE MRI as a routine 3D pulse sequence for short-T2 imaging on clinical scanners.

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