Dr. Tianming Song Profile

Dr. Tianming Song

at Harbin Univ of Science and Technology

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Proceedings Article | 19 March 2015 Paper

Endoscopic Cerenkov luminescence imaging: in vivo small animal tumor model validation

Tianming Song, Chengpeng Bao, Zhenhua Hu, Kun Wang, Xia Liu, Jie Tian

Proceedings Volume 9417, 94172U (2015) https://doi.org/10.1117/12.2081369

KEYWORDS: Luminescence, Tumors, Imaging systems, In vivo imaging, Endoscopy, Cameras, Tissues, Cerenkov radiation imaging, Photography, Laparoscopy

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Background: Cerenkov luminescence imaging (CLI) provides a great potential for clinical translation of optical molecular imaging techniques through using clinical approved radiotracers. However, it is difficult to obtain the Cerenkov luminescence signal of deeper biological tissues due to the small magnitude of the signal. To efficiently acquire the weak Cerenkov luminescence, we developed an endoscopic Cerenkov luminescence imaging (ECLI) system to reduce the in vivo imaging depth with minimum invasion, and validated the system on small animal tumor models. Methods: For the ECLI system, the laparoscope was connected to a high sensitive charge-couple device (CCD) camera (DU888+, Andor, UK) by a custom made adapter. We conducted a series of in vitro and in vivo experiments by use of the system. In the in vitro experiment, the endoscopic luminescence images of the ¹⁸F-FDG with various activities in EP tubes were acquired using ECLI system, and the sensitivity was compared with conventional CLI system. In the in vivo tumor experiment, ¹⁸F-FDG with the activity of 200μCi were intravenously injected into 3 tumor mice. Then the ECLI system was used to acquire the optical images for both non-invasive and invasive conditions. Conclusion: Experimental data showed the ECLI system could detect the ¹⁸F-FDG with the activity as low as 1μCi. Furthermore, our preliminary results indicated the possibility of ECLI technique for detecting Cerenkov signals inside the tumor tissue with deeper depth and guiding the surgical operation of tumor excision. We believe that this technique can help to accelerate the clinical translation of CLI.

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