Abstract #0962

Correction of Eddy Currents for Time-Domain-Interleaved Blipped-Phase-Encoding Echo-Planar Spectroscopic Imaging

Yoshitaka Bito¹, Koji Hirata¹, Satoshi Hirata¹, Toru Shirai¹, Toshihiko Ebisu², Yuko Kawai³, Yosuke Otake¹, Yoshihisa Soutome¹, Hisaaki Ochi¹, Masahiro Umeda³, Toshihiro Higuchi⁴, Chuzo Tanaka⁴

¹Central Research Laboratory, Hitachi, Ltd., Kokubunji-shi, Tokyo, Japan; ²Neurosurgery, Nantan General Hospital, Nantan-shi, Kyoto, Japan; ³Medical Informatics, Meiji University of Integrative Medicine, Nantan-shi, Kyoto, Japan; ⁴Neurosurgery, Meiji University of Integrative Medicine, Nantan-shi, Kyoto, Japan

High-speed spectroscopic imaging using the echo-planar technique is sometimes distorted by eddy currents. We developed an eddy current correction technique for time-domain-interleaved blipped-phase-encoding echo-planar spectroscopic imaging (TDI-BPE-EPSI). This technique uses correction of spatial shift due to chemical shifts in the blipped-phase-encoding direction before applying eddy current correction based on the water signal. Correction of eddy currents is demonstrated by applying this technique to a phantom and a rat brain in vivo. This technique is shown to be also useful in diffusion-weighted spectroscopic imaging, which causes more eddy currents due to strong diffusion gradients.