Tissue velocity imaging of coronary artery by rotating-type intravascular ultrasound

In-vivo, cardiac-cycle related intimal displacement of coronary plaques assessed by 3-D ECG-gated intravascular ultrasound: exploring its correlate with tissue deformability identified by palpography

“…As the vessel wall is always subject to shear and wall stress, understanding the dynamic characteristics of coronary atherosclerosis by analyzing the intimal displacement velocity in the radial direction could provide an additive value to gray-scale IVUS [11].…”

“…A recent study established that the luminal, pressure driven displacement of low echogenic (soft) plaques is faster than the one present in calcified lesions [11].…”

Arterial Plaque Characterization Using IVUS Radio-Frequency Time Echoes

“…This gave rise to what is called intravascular elastography (also known as IVUS elastography) (Cespedes et al, 1991). In fact, investigators have taken advantage of the possibility of recording the RF echoes to use them for displacements or strain determination (Ryan & Foster, 1997;De Korte et al, 1998;Schaar et al, 2003;Saijo et al, 2004;Shapo et al, 1996). Despite the striking difference of the strain values for various plaques, most of the studies were performed in vitro where the temperature is different from in vivo case.…”

Estimation of the Transverse Strain Tensor in the Arterial Wall Using IVUS Image Registration

“…To deal with this problem, one strategy is to minimize the tissue and catheter motion by limiting the luminal pressure difference for the strain measurement; de Korte et al (2002a) used a pressure difference of ϳ5 mm Hg with resulting strains of Ͻ2%. Another strategy is to compensate for the catheter motion before the strain estimation (de Korte et al 1999;Janssen et al 2000;Leung et al 2006;Saijo et al 2004;Shi et al 2005). Despite these efforts, the issue is not well resolved.…”