Ryosuke Nasada1, Tomoki Takeuchi1,
Junfeng Zhang1, Takashi Tokuno2, Mitsunori Tada3,
Youichi Yamazaki1,
1Department of Medical Physics and
Engineering, Graduate School of Medicine, Osaka University , Suita, Osaka,
Japan; 2Course of Precision Engineering, School of Science and
Engineering, Chuo University, Tokyo, Japan; 3Digital Human
Research Center, National Institute of Advanced Industrial Science and
Technology, Tokyo, Japan
This
study was undertaken to develop a method for generating the maps of Youngfs
elastic modulus using tagged MRI. The maps were generated using the strain
obtained by harmonic phase analysis and stress distribution. The accuracy of
our method was investigated using silicone phantoms of different hardness.
There was a good correlation between the strain obtained by our method and
that measured using a material testing machine (r=0.99). The difference in
hardness in phantoms was clearly demonstrated. Our method will be useful for
evaluating the tissue elasticity, because it allows us to automatically
generate the maps of elastic modulus.