Development of qualitative near infrared vascular imaging system with tuned aperture computed tomography

Tatsuhiko Matsushita; Toshiaki Miyati; Kazuya Nakayama; Takashi Hamaguti; Yoshihiko Hayakawa; Allan G. Farman; Yuzo Kikuchi

doi:10.1117/12.709241

22 March 2007 Development of qualitative near infrared vascular imaging system with tuned aperture computed tomography

Tatsuhiko Matsushita, Toshiaki Miyati, Kazuya Nakayama, Takashi Hamaguti, Yoshihiko Hayakawa, Allan G. Farman, Yuzo Kikuchi

Author Affiliations +

Proceedings Volume 6510, Medical Imaging 2007: Physics of Medical Imaging; 65103G (2007) https://doi.org/10.1117/12.709241
Event: Medical Imaging, 2007, San Diego, CA, United States

Abstract

We developed a novel system for imaging and qualitative analysis of surface vessels using near infrared (NIR) radiation with tuned aperture computed tomography (TACT^®), even if the NIR cannot transmit through thick regions. NIR-sensitive CCD camera was surrounded by sixty light emitting diodes (alternating wavelengths of 700 nm and 810 nm), and could only detect the NIR from the subcutaneous tissue. We obtained multiple near infrared projections of surface vessels at each wavelength in accordance with the optical aperture theory within one second. Then, we created tomograms using the TACT program, and determined the venous oxygenation index (VOI), which reflected the oxygen saturation level, calculated from the image signals at each wavelength. This system produced thinner NIR tomograms under 0.5 mm. The change in VOI after load test calculated from NIR tomograms was more sensitive than that from NIR images without tomography. Our novel system makes it possible to non-invasively obtain NIR tomograms and accurately analyze changes in oxygen saturation.

Citation Download Citation

Tatsuhiko Matsushita, Toshiaki Miyati, Kazuya Nakayama, Takashi Hamaguti, Yoshihiko Hayakawa, Allan G. Farman, and Yuzo Kikuchi "Development of qualitative near infrared vascular imaging system with tuned aperture computed tomography", Proc. SPIE 6510, Medical Imaging 2007: Physics of Medical Imaging, 65103G (22 March 2007); https://doi.org/10.1117/12.709241

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