Title :
Assessing cross-sectional elasticity map by dynamic imaging acoustic waves with phase sensitive optical coherence tomography
Author :
Shaozhen Song ; Zhihong Huang ; Wang, Ruikang K.
Author_Institution :
Dept. of Bioeng., Univ. of Washington, Seattle, WA, USA
Abstract :
In this paper, we introduced the combined acoustical and optical method for imaging the propagating shear waves and mapping the shear modulus with a high resolution that is comparable to optical coherence tomography (OCT). The mechanical waves propagation is dynamically imaged with phase-sensitive OCT (PhS-OCT) with an equivalent frame rate of ~47 kHz. The 2-D elastography image is retrieved from measuring the shear wave velocity in the imaging region. The quantitative accuracy of this method is examined by validating experiments on agar phantoms.
Keywords :
biological tissues; biomechanics; biomedical optical imaging; biomedical ultrasonics; elasticity; image retrieval; medical image processing; optical tomography; phantoms; ultrasonic imaging; ultrasonic propagation; 2D elastography image retrieval; acoustical method; agar phantoms; cross-sectional elasticity map; dynamic imaging acoustic waves; equivalent frame rate; mechanical wave propagation; optical method; phase sensitive optical coherence tomography; phase-sensitive OCT; quantitative accuracy; shear wave propagation imaging; shear wave velocity; Biomedical optical imaging; Coherence; Elasticity; Optical imaging; Phantoms; Mechanical property; acoustic wave imaging; optical coherence tomography; shear modulus; shear wave velocity;
Conference_Titel :
Ultrasonics Symposium (IUS), 2013 IEEE International
Conference_Location :
Prague
Print_ISBN :
978-1-4673-5684-8
DOI :
10.1109/ULTSYM.2013.0298
