Suppression of Artifacts in Simultaneous 3D T1 and T2*-weighted Dual-Echo Imaging
Won-Joon Do 1 , Seung Hong Choi 2 , Eung Yeop Kim 3 , and Sung-Hong Park 1
Korea Advanced Institute of Science and
Technology, Daejeon, Korea,
of Radiology, Seoul National University College of
Medicine, Seoul, Korea,
Radiology, Gachon University Gil Medical Center, Incheon,
Dual-echo sequence allows us to acquire 3D T1 and
T2*-weighted images simultaneously. The conflicting
parameter conditions of T1and T2* contrasts can be
resolved by echo-specific k-space reordering schemes.
However, abrupt changes in scan conditions for the
echo-specific k-space reordering can cause ringing
artifacts. In this study, we propose a new approach of
smooth transition in the regions of abrupt changes, to
suppress the artifacts. The ringing artifacts in the
echo-specific k-space reordered dual-echo sequence
without the smooth transition could be effectively
suppressed with the proposed approach and thus the image
qualities became closer to those acquired with
conventional single-echo sequences.
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