Yu Chen1, Suhao Qiu1, Zhao He1, Fuhua Yan2, Ruokun Li2, and Yuan Feng1
1Institute for Medical Imaging Technology, School of Biomedical Engineering, Shanghai Jiao Tog University, Shanghai, China, 2Department of Radiology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
1Institute for Medical Imaging Technology, School of Biomedical Engineering, Shanghai Jiao Tog University, Shanghai, China, 2Department of Radiology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
Using 2nd-order Prony series,
sample frequency response measured from indentation was estimated and compared
with that from MRE. In 50-100Hz frequency range, an apparent
frequency-dependent behavior was observed by MRE, while no such phenomenon was
observed by indentation.
Figure
3. (a) The experimental and fitted ramp and relaxation
curves from indentation tests. (b) Wave propagation images of MRE from 6
different actuation frequencies.
Figure
4. Comparisons of the shear moduli of the gel phantom based
on indentation and MRE measurements.