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Proceedings Paper

Multimodal endoscopic imaging and Raman spectroscopy for improving in vivo diagnosis of gastric malignancies during clinical gastroscopy
Author(s): Mads Sylvest Bergholt; Wei Zheng; Kan Lin; Khek Yu Ho; Khay Guan Yeoh; Ming Teh; Jimmy Bok Yan So; Zhiwei Huang
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Paper Abstract

A near-infrared Raman spectroscopy system integrated with multimodal endoscopic imaging has been developed for in vivo diagnosis and detection of gastric malignancies during clinical gastroscopic examinations. In this study, 1238 high-quality in vivo Raman spectra in the range 800-1800 cm-1 were acquired from gastric normal and malignant tissue within 0.5 second from 81 patients under the guidance of white-light (WL), narrow-band (NB) and autofluorescence (AF) imaging during clinical endoscopy. Significant differences in Raman spectral shapes and intensities between normal and malignant gastric mucosal tissue were observed, particularly in the spectral ranges 800-900, 1000-1100, 1250-1450 and 1600-1800 cm-1, which primarily contain signals related to proteins, nucleic acids and lipids. Partial least squares discriminant analysis (PLS-DA) could identify in vivo Raman spectra of neoplasia with a sensitivity of 82.9% and specificity of 88.9% using leave-one-tissue site out cross validation. This study demonstrates that in vivo Raman spectroscopy in conjunction with multimodal endoscopic imaging modalities holds a great promise for improving the early diagnosis of gastric malignancies.

Paper Details

Date Published: 3 January 2011
PDF: 5 pages
Proc. SPIE 7990, Optical Sensors and Biophotonics II, 79900A (3 January 2011); doi: 10.1117/12.887956
Show Author Affiliations
Mads Sylvest Bergholt, National Univ. of Singapore (Singapore)
Wei Zheng, National Univ. of Singapore (Singapore)
Kan Lin, National Univ. of Singapore (Singapore)
Khek Yu Ho, National Univ. of Singapore (Singapore)
National Univ. Hospital System (Singapore)
Khay Guan Yeoh, National Univ. of Singapore (Singapore)
National Univ. Hospital System (Singapore)
Ming Teh, National Univ. of Singapore (Singapore)
National Univ. Hospital System (Singapore)
Jimmy Bok Yan So, National Univ. of Singapore (Singapore)
National Univ. Hospital System (Singapore)
Zhiwei Huang, National Univ. of Singapore (Singapore)

Published in SPIE Proceedings Vol. 7990:
Optical Sensors and Biophotonics II
Qingming Luo; Frank Chuang; Stefan Haacke; Chih-Chung Yang, Editor(s)

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