Title :
Magnetic Resonance Elastography to Observe Deep Areas: Comparison of External Vibration Systems
Author :
Suga, M. ; Obata, T. ; Hirano, M. ; Tanaka, T. ; Ikehira, H.
Author_Institution :
Chiba Univ., Chiba
Abstract :
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.
Keywords :
biological tissues; biomagnetism; biomechanics; biomedical measurement; elastic waves; liver; magnetic resonance imaging; phantoms; vibrations; deep-area observation; external vibration systems; longitudinal driver; magnetic resonance elastography; porcine liver phantom; shear modulus measurement; shear waves; tissue surface; transverse driver; Frequency; Imaging phantoms; Liver; Magnetic resonance; Magnetic resonance imaging; Nuclear magnetic resonance; Pathology; Surface waves; Vibrations; Viscosity; Elasticity Imaging Techniques; Humans; Image Interpretation, Computer-Assisted; Magnetic Resonance Imaging; Models, Anatomic; Phantoms, Imaging; Vibration;
Conference_Titel :
Engineering in Medicine and Biology Society, 2007. EMBS 2007. 29th Annual International Conference of the IEEE
Conference_Location :
Lyon
Print_ISBN :
978-1-4244-0787-3
DOI :
10.1109/IEMBS.2007.4352861
