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25 October 2001 Coaxial acousto-optical tomography
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Proceedings Volume 4597, Biophotonics Instrumentation and Analysis; (2001)
Event: International Symposium on Photonics and Applications, 2001, Singapore, Singapore
The proposed new method solves the problem that it is difficult to obtain high-resolution simultaneously in both x and y direction for an ultrasound -modulated optical tomographic 2-D image. In this method, incident laser and detector are coaxial to utilize the character of small lateral size of ultrasonic focused zone. An 860nm, 20mW laser is delivered by a fiber that passes the hole in the center of ultrasound transducer. It illuminated to a 20mm thick fat tissue with a buried object, a 5mm-wide colloidal cube, meanwhile ultrasound is focused to the sample. The scattering modulated photons are collected by an avalanche diode module, and then output signal is amplified and inputted to an oscilloscope with a FFT module. A 3D translation stage carried the sample moving to complete scanning. Combing with frequency swept ultrasound technology, the 2D tomographic images of different depth are obtained.
© (2001) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Yong Yao, Da Xing, and Ken-ichi Ueda "Coaxial acousto-optical tomography", Proc. SPIE 4597, Biophotonics Instrumentation and Analysis, (25 October 2001);

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