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Abstract #1404

Application of MR Elastography to Transvertebral Psoas Major Muscle

Tomokazu Numano1,2, Daiki Ito1,2,3, Koichi Takamoto4, Kazuyuki Mizuhara5, and Hisao Nishijo6

1Department of Radiological Sciences, Graduate School of Human Health Sciences, Tokyo Metropolitan University, Tokyo, Japan, 2Health Research Institute, National Institute of Advanced Industrial Science and Technology, Tsukuba, Japan, 3Office of Radiation Technology, Keio University Hospital, Tokyo, Japan, 4Department of Judo Neurophysiotherapy, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Toyama, Japan, 5Mechanical Engineering, Tokyo Denki University, Tokyo, Japan, 6Department of System Emotional Science, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Toyama, Japan

The aim of the present work was to develop the vibration techniques for the psoas major muscle (PM) MR elastography (MRE). The results indicated that the PM well vibrated, due to transmission of vibration from the lumbar spine. These findings suggest that placement of a narrow vibration pad under the supine body, along the lumbar spine, would allow PM MRE. The present techniques for the PM MRE provide a quantitative diagnostic tool for LBP-associated changes in the muscles, since increased stiffness of the muscle due to continuous contraction is suggested to be an important cause of LBP.

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