Abstract #2437

Simple MR Elastography: A Gradient-Echo Type Multiecho MR Sequence

Tomokazu Numano¹,², Junichi Hata³, Kazuyuki Mizuhara⁴, Kouichi Takamoto⁵, Toshikatsu Washio², Hisao Nishijo⁶, Kazuo Yagi¹, Kazuhiro Homma²

¹Radiological Science, Tokyo Metropolitan University, Arakawa-ku, Tokyo, Japan; ²Institute for Human Science and Biomedical Engineering, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki, Japan; ³The University of Tokyo Hospital, Bunkyo-ku, Tokyo, Japan; ⁴Mechanical Engineering, Tokyo Denki University, Adachi-ku, Tokyo, Japan; ⁵Department of Judo Neurophysiotherapy, University of Toyama, Toyama, Japan; ⁶System Emotional Science (Physiology), University of Toyama, Toyama, Japan

In this work we report on the development of a new technique for non-MSG MR Elastography sequence based upon a gradient-echo type multiecho MR sequence. In contrast to multiecho imaging major benefit of shortening acquisition time, we use the other benefit; separate images are produced from each echo of the train with different TE. When the period of actuator-generated vibration and the multiecho readout gradient lobes are in agreement, the MSG-like effect serves as the maximum. Moreover, the later generated echo is the greater the MSG-like effect (1st<2nd<3rd...), the non-MSG MRE multiecho sequences include images with different MSG-like effects are used to obtain various simultaneously without increasing the acquisition time.