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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