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Proceedings Paper

Optical coherence tomography for ultrahigh-resolution 3D imaging of cell development and real-time guiding for photodynamic therapy
Author(s): Tianshi Wang; Jinggao Zhen; Bo Wang; Ping Xue
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Paper Abstract

Optical coherence tomography is a new emerging technique for cross-sectional imaging with high spatial resolution of micrometer scale. It enables in vivo and non-invasive imaging with no need to contact the sample and is widely used in biological and clinic application. In this paper optical coherence tomography is demonstrated for both biological and clinic applications. For biological application, a white-light interference microscope is developed for ultrahigh-resolution full-field optical coherence tomography (full-field OCT) to implement 3D imaging of biological tissue. Spatial resolution of 0.9μm×1.1μm (transverse×axial) is achieved A system sensitivity of 85 dB is obtained at an acquisition time of 5s per image. The development of a mouse embryo is studied layer by layer with our ultrahigh-resolution full-filed OCT. For clinic application, a handheld optical coherence tomography system is designed for real-time and in situ imaging of the port wine stains (PWS) patient and supplying surgery guidance for photodynamic therapy (PDT) treatment. The light source with center wavelength of 1310nm, -3 dB wavelength range of 90 nm and optical power of 9mw is utilized. Lateral resolution of 8 μm and axial resolution of 7μm at a rate of 2 frames per second and with 102dB sensitivity are achieved in biological tissue. It is shown that OCT images distinguish very well the normal and PWS tissues in clinic and are good to serve as a valuable diagnosis tool for PDT treatment.

Paper Details

Date Published: 1 December 2009
PDF: 14 pages
Proc. SPIE 7507, 2009 International Conference on Optical Instruments and Technology: Optical Trapping and Microscopic Imaging, 75070B (1 December 2009); doi: 10.1117/12.837345
Show Author Affiliations
Tianshi Wang, Tsinghua Univ. (China)
Jinggao Zhen, Tsinghua Univ. (China)
Bo Wang, Tsinghua Univ. (China)
Ping Xue, Tsinghua Univ. (China)

Published in SPIE Proceedings Vol. 7507:
2009 International Conference on Optical Instruments and Technology: Optical Trapping and Microscopic Imaging
Xiaocong Yuan; Yinmei Li; Arthur Chiou; Min Gu; Dennis Matthews; Colin Sheppard, Editor(s)

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