Title :
Optical computed tomography imaging of absorbers hidden in scattering medium by detection of ultrasonic phase-shift caused by laser illumination-ultrasonic velocity imaging
Author :
Horinaka, H. ; Wada, Kenji ; Okasaka, Akira ; Cho, Yoshio ; Matsunaka, Toshiyulu ; Saimi, Syohei
Author_Institution :
Dept. of Phys. & Electron., Osaka Prefecture Univ., Japan
Abstract :
To obtain an optical CT (Computed Tomography) image of a living body, we proposed a method for detecting local temperature variation caused by optical absorption as the variation of ultrasonic velocity in a tissue mimicking material. Through a basic experiment, we confirmed that it was possible to detect the variation of ultrasonic velocity as the phase difference of an ultrasonic wave propagating in a medium with the scattering coefficient equivalent to that of a living body
Keywords :
acousto-optical modulation; biological tissues; biomedical ultrasonics; biothermics; image reconstruction; light absorption; medical image processing; optical tomography; ultrasonic scattering; ultrasonic velocity; absorbers; laser illumination; living body; local temperature variation; mimicking material; optical absorption; optical computed tomography imaging; phase difference; scattering coefficient; scattering medium; ultrasonic phase-shift detection; ultrasonic velocity imaging; Absorption; Biological materials; Computed tomography; Optical computing; Optical imaging; Optical materials; Optical scattering; Phase detection; Temperature; Ultrasonic imaging;
Conference_Titel :
Ultrasonics Symposium, 2000 IEEE
Conference_Location :
San Juan
Print_ISBN :
0-7803-6365-5
DOI :
10.1109/ULTSYM.2000.921651
