Magnetic resonance elastography to observe deep areas: comparison of external vibration systems.
MRE methods deform the sample using an external vibration system. We have been using a transverse driver, which generates shear waves at the object surface. One of the problems is that shear waves rapidly attenuate at the surface of tissue and do not propagate into the body. In this study, we compared the shear waves generated by transverse and longitudinal drivers. The longitudinal driver was found to induce shear waves deep inside a porcine liver phantom. These results suggest that the longitudinal driver will allow measurement of the shear modulus deep inside the body.
Suga
Mikio
M
Graduate School of Technology, Chiba University, Chiba, Japan. mikio.suga@faculty.chiba-u.jp
Obata
Takayuki
T
Hirano
Masaya
M
Tanaka
Takashi
T
Ikehira
Hiroo
H
D054459:Elasticity Imaging Techniques / Q000379:methods*; D006801:Humans; D007090:Image Interpretation, Computer-Assisted; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008953:Models, Anatomic; D019047:Phantoms, Imaging; D014732:Vibration