Mr. Honghao Cao Profile

Honghao Cao

at Xidian Univ

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Proceedings Article | 27 February 2019 Paper

Performance improvement of Cerenkov luminescence endoscope by optimizing system structure

Honghao Cao, Ruibo Chen, Duofang Chen, Xu Cao, Xiaojian Lu, Shuhui Liang, Yonghua Zhan, Jimin Liang, Kaichun Wu, Xueli Chen

Proceedings Volume 10871, 108711A (2019) https://doi.org/10.1117/12.2508501

KEYWORDS: Endoscopes, Luminescence, Imaging systems, Signal attenuation, Radio optics, Endoscopy, CCD cameras, Tumors, Tissue optics, Glasses

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Cerenkov fluorescence imaging (CLI) has set a bridge between optical and nuclear imaging technologies by using an optical method to detect the distribution of radiotracers. Combining the emerged CLI technique with a clinical endoscope, the Cerenkov luminescence endoscope (CLE) was developed to avoid the problem of the poor penetration depth of the Cerenkov light. However, due to low energy of the Cerenkov light and the transportation loss during endoscopic imaging, the acquisition time of CLE signal is long and the imaging results are poor, which has limited the clinical applications of CLE. There are two ways to improve the availability of the current CLE system. First is to enhance the emitted signals of the Cerenkov light at the source end by developing new kinds of imaging probes or selecting high yield radionuclides. However, this will introduce the in vivo unfriendly problem in clinical translations. The second method is to improve the detection sensitivity of CLE system by optimizing the structure of the system. Here, we customized four endoscopes with different field of view (FOV) angles of endoscope probe and different monofilament diameters of imaging fiber bundles. By comparing the results obtained by different CLE systems, we optimized the parameters of system. The CLE imaging of 18F-FDG showed that when the distance between the probe and radionuclide source was fixed, smaller angle of FOV and lager monofilament diameter will provide higher collection efficiency.

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