Roger C. Grimm1, Armando Manduca2,
Richard L. Ehman
1Mayo Clinic,
Recently,
Wang has shown that two phase samples are adequate to generate stiffness estimates
in phantom and breast experiments. Acquiring only two phase samples is only
justified if the vast majority of the applied energy is occurring at a single
frequency. This paper finds that there is virtually no energy contained in
the higher harmonics during liver exams. Stiffness maps from inversions of
two and four phase samples show a highly linear relationship with a slight
underestimation obtained from two phase sample data set due to the root 2
lower SNR.