Fig. 4.

Montage of circumferential strain elastograms, displayed in percentage, obtained from simulated vessels with modulus contrasts of (a) $-12.04\mathrm{dB}$, (b) $-6.02\mathrm{dB}$, and (c) $-2.5\mathrm{dB}$. Ideal circumferential strain elastograms are shown in the first column of each montage, and the elastograms obtained from vessel phantoms with attenuation coefficients of 0.6, 1, and $3.5\mathrm{dB}/\mathrm{cm}$ are shown in the remaining columns. The two rectangular boxes in (a) denotes the regions of interests corresponding to the plaque and vessel wall that was used to compute ${\mathrm{CNR}}_e$ values reported in Fig. 7.