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Proceedings Paper

Clinical application of a multi-modal endoscope with fluorescent peptide in detection of colorectal neoplasia (Conference Presentation)
Author(s): Zhenzhen Dai; Bishnu P. Joshi; Zhenghong Gao; Jeonghoon Lee; Navin Ghimire; Anoop Prabhu; Erik J. Wamsteker; Richard S. Kwon; Grace H. Elta; Henry D. Appelman; Scott R. Owens; Rork Kuick; Kim K. Turgeon; Thomas D. Wang

Paper Abstract

Early detection of precursor lesions for colorectal cancer can greatly improve survival. Pre-neoplasia can appear flat with conventional white light endoscopy. Sessile serrated adenomas (SSA) are precursor lesions found primarily in the proximal colon and frequently appear flat and indistinct. We performed a clinical study of n=37 patients using a multimodal endoscopy with a FITC-labeled peptide specific for SSA. Lesions were imaged with white light, reflectance and fluorescence. White light images were acquired before the peptide was applied and were used to help localize regions of abnormal tissues rightly. Co-registered fluorescence and reflectance images were combined to get ratio images thus the distance was corrected. We calculated the target/background ratio (T/B ratio) to quantify the images and found 2.3-fold greater fluorescence intensity for SSA compared with normal tissues. We found the T/B ratio for SSA to be significantly greater than that for normal colonic mucosa with 89.47% sensitivity and 91.67% specificity at the threshold of 1.22. An ROC curve for SSA and normal mucosa was also plotted with area under curve (AUC) of 0.93. The result also shows that SSA and adenoma are statistically significant and can be identified with 78.95% sensitivity and 90.48% specificity at the threshold of 1.66. An ROC curve was plotted with AUC of 0.88. Therefore, our result shows that the application of a multimodal endoscope with fluorescently labeled peptide can quantify images and works especially good for the detection of SSA which is a premalignant flat lesion conferring a high risk of subsequently leading to a colon cancer.

Paper Details

Date Published: 19 April 2017
PDF: 1 pages
Proc. SPIE 10049, Molecular-Guided Surgery: Molecules, Devices, and Applications III, 100490U (19 April 2017); doi: 10.1117/12.2252781
Show Author Affiliations
Zhenzhen Dai, Univ. of Michigan (United States)
Bishnu P. Joshi, Univ. of Michigan (United States)
Zhenghong Gao, Univ. of Michigan (United States)
Jeonghoon Lee, Univ. of Michigan (United States)
Navin Ghimire, Univ. of Michigan (United States)
Anoop Prabhu, Univ. of Michigan (United States)
Erik J. Wamsteker, Univ. of Michigan (United States)
Richard S. Kwon, Univ. of Michigan (United States)
Grace H. Elta, Univ. of Michigan (United States)
Henry D. Appelman, Univ. of Michigan (United States)
Scott R. Owens, Univ. of Michigan (United States)
Rork Kuick, Univ. of Michigan (United States)
Kim K. Turgeon, Univ. of Michigan (United States)
Thomas D. Wang, Univ. of Michigan (United States)

Published in SPIE Proceedings Vol. 10049:
Molecular-Guided Surgery: Molecules, Devices, and Applications III
Brian W. Pogue; Sylvain Gioux, Editor(s)

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