TY - JOUR
T1 - Intravascular optical coherence elastography
AU - Wang, Tianshi
AU - Pfeiffer, Tom
AU - Akyildiz, Ali
AU - van Beusekom, Heleen M.M.
AU - Huber, Robert
AU - van der Steen, Antonius F.W.
AU - Soest, Gijs Van
PY - 2022
Y1 - 2022
N2 - Optical coherence elastography (OCE), a functional extension of optical coherence tomography (OCT), visualizes tissue strain to deduce the tissue’s biomechanical properties. In this study, we demonstrate intravascular OCE using a 1.1 mm motorized catheter and a 1.6 MHz Fourier domain mode-locked OCT system. We induced an intraluminal pressure change by varying the infusion rate from the proximal end of the catheter. We analysed the pixel-matched phase change between two different frames to yield the radial strain. Imaging experiments were carried out in a phantom and in human coronary arteries in vitro. At an imaging speed of 3019 frames/s, we were able to capture the dynamic strain. Stiff inclusions in the phantom and calcification in atherosclerotic plaques are associated with low strain values and can be distinguished from the surrounding soft material, which exhibits elevated strain. For the first time, circumferential intravascular OCE images are provided side by side with conventional OCT images, simultaneously mapping both the tissue structure and stiffness.
AB - Optical coherence elastography (OCE), a functional extension of optical coherence tomography (OCT), visualizes tissue strain to deduce the tissue’s biomechanical properties. In this study, we demonstrate intravascular OCE using a 1.1 mm motorized catheter and a 1.6 MHz Fourier domain mode-locked OCT system. We induced an intraluminal pressure change by varying the infusion rate from the proximal end of the catheter. We analysed the pixel-matched phase change between two different frames to yield the radial strain. Imaging experiments were carried out in a phantom and in human coronary arteries in vitro. At an imaging speed of 3019 frames/s, we were able to capture the dynamic strain. Stiff inclusions in the phantom and calcification in atherosclerotic plaques are associated with low strain values and can be distinguished from the surrounding soft material, which exhibits elevated strain. For the first time, circumferential intravascular OCE images are provided side by side with conventional OCT images, simultaneously mapping both the tissue structure and stiffness.
UR - http://www.scopus.com/inward/record.url?scp=85138808513&partnerID=8YFLogxK
U2 - 10.1364/BOE.470039
DO - 10.1364/BOE.470039
M3 - Article
AN - SCOPUS:85138808513
SN - 2156-7085
VL - 13
SP - 5418
EP - 5433
JO - Biomedical Optics Express
JF - Biomedical Optics Express
IS - 10
ER -