Artificial intelligence and colonoscopy: Current status and future perspectives
Abstract
Background and Aim: Application of artificial intelligence in medicine is now attracting substantial attention. In the field of gastrointestinal endoscopy, computer‐aided diagnosis (CAD) for colonoscopy is the most investigated area, although it is still in the preclinical phase. Because colonoscopy is carried out by humans, it is inherently an imperfect procedure. CAD assistance is expected to improve its quality regarding automated polyp detection and characterization (i.e. predicting the polyp's pathology). It could help prevent endoscopists from missing polyps as well as provide a precise optical diagnosis for those detected. Ultimately, these functions that CAD provides could produce a higher adenoma detection rate and reduce the cost of polypectomy for hyperplastic polyps. Methods and Results: Currently, research on automated polyp detection has been limited to experimental assessments using an algorithm based on ex vivo videos or static images. Performance for clinical use was reported to have >90% sensitivity with acceptable specificity. In contrast, research on automated polyp characterization seems to surpass that for polyp detection. Prospective studies of in vivo use of artificial intelligence technologies have been reported by several groups, some of which showed a >90% negative predictive value for differentiating diminutive (≤5 mm) rectosigmoid adenomas, which exceeded the threshold for optical biopsy. Conclusion: We introduce the potential of using CAD for colonoscopy and describe the most recent conditions for regulatory approval for artificial intelligence‐assisted medical devices.
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Previous studies on CADx systems for colonoscopy focused on assessing the performances of AI against the accuracy of physicians or against criteria established by gastroenterology societies for implementing the technology in a clinical setting.
“Previous studies on cadx systems for colonoscopy focused on assessing the performances of ai against the accuracy of physicians19,20,27–30, or against the criteria established by gastroenterology societies for implementing the technology in a clinical setting31–34.”
From Experimental evidence of effective human–AI collaboration in medical decision-making (2022) · cites this paper as [19]
Cites
Prevention of Colorectal Cancer by Colonoscopic Polypectomy
Winawer, S. J., Zauber, A. G., Ho, M. N., O’Brien, M. J., Gottlieb, L. S., Sternberg, S. S., Waye, J. D., Schapiro, M., Bond, J. H., Panish, J. F., et al. (1993) · New England Journal of Medicine · doi:10.1056/nejm199312303292701 · Cited by 4,585 · see citing works
Colonoscopic Polypectomy and Long-Term Prevention of Colorectal-Cancer Deaths
Zauber, A. G., Winawer, S. J., O’Brien, M. J., Lansdorp‐Vogelaar, I., van Ballegooijen, M., Hankey, B. F., Shi, W., Bond, J. H., Schapiro, M., Panish, J. F., et al. (2012) · New England Journal of Medicine · doi:10.1056/nejmoa1100370 · Cited by 3,185 · see citing works
Adenoma detection rate and risk of colorectal cancer and death
Corley, D. A., Jensen, C. D., Marks, A. R., Zhao, W. K., Lee, J. K., Doubeni, C. A., Zauber, A. G., de Boer, J., Fireman, B. H., Schottinger, J. E., et al. (2014) · New England Journal of Medicine · doi:10.1056/nejmoa1309086 · Cited by 2,270 · see citing works
Bernal, J., Sánchez, F. J., Fernández-Esparrach, G., Gil, D., Rodríguez, C., & Vilariño, F. (2015) · Computerized Medical Imaging and Graphics · doi:10.1016/j.compmedimag.2015.02.007 · Cited by 2,191 · see citing works
Quality Indicators for Colonoscopy and the Risk of Interval Cancer
Kaminski, M. F., Reguła, J., Kraszewska, E., Polkowski, M., Wojciechowska, U. E., Didkowska, J. A., Zwierko, M., Rupiński, M., Nowacki, M. P., & Butruk, E. (2010) · New England Journal of Medicine · doi:10.1056/nejmoa0907667 · Cited by 2,012 · see citing works
Long-term colorectal-cancer incidence and mortality after lower endoscopy
Nishihara, R., Wu, K., Lochhead, P., Morikawa, T., Liao, X., Qian, Z. R., Inamura, K., Kim, S. A., Kuchiba, A., Yamauchi, M., et al. (2013) · New England Journal of Medicine · doi:10.1056/nejmoa1301969 · Cited by 1,483 · see citing works
Automated Polyp Detection in Colonoscopy Videos Using Shape and Context Information
Tajbakhsh, N., Gurudu, S., & Liang, J. (2015) · IEEE Transactions on Medical Imaging · doi:10.1109/tmi.2015.2487997 · Cited by 1,215 · see citing works
Park, S. H., & Han, K. (2018) · Radiology · doi:10.1148/radiol.2017171920 · Cited by 894 · see citing works
Confocal laser endoscopy for diagnosing intraepithelial neoplasias and colorectal cancer in vivo
Kießlich, R., Burg, J., Vieth, M., Gnändiger, J., Enders, M., Delaney, P. M., Polglase, A. L., McLaren, W. J., Janell, D., Thomas, S., et al. (2004) · Gastroenterology · doi:10.1053/j.gastro.2004.06.050 · Cited by 843 · see citing works
Urban, G., Tripathi, P. V., Alkayali, T., Mittal, M., Jalali, F., Karnes, W. E., & Baldi, P. (2018) · Gastroenterology · doi:10.1053/j.gastro.2018.06.037 · Cited by 746 · see citing works
Byrne, M. F., Chapados, N., Soudan, F., Oertel, C., Linares Pérez, M., Kelly, R., Iqbal, N., Chandelier, F., & Rex, D. K. (2019) · Gut · doi:10.1136/gutjnl-2017-314547 · Cited by 635 · see citing works
Rex, D. K., Kahi, C., O'Brien, M., Levin, T. R., Pohl, H., Rastogi, A., Burgart, L., Imperiale, T., Ladabaum, U., Cohen, J., et al. (2011) · Gastrointestinal Endoscopy · doi:10.1016/j.gie.2011.01.023 · Cited by 629 · see citing works
Computer-aided tumor detection in endoscopic video using color wavelet features
Karkanis, S. A., Iakovidis, D. K., Maroulis, D., Karras, D. A., & Tzivras, M. (2003) · IEEE Transactions on Information Technology in Biomedicine · doi:10.1109/titb.2003.813794 · Cited by 511 · see citing works
Mori, Y., Kudo, S.-E., Misawa, M., Saito, Y., Ikematsu, H., Hotta, K., Ohtsuka, K., Urushibara, F., Kataoka, S., Ogawa, Y., et al. (2018) · Annals of Internal Medicine · doi:10.7326/m18-0249 · Cited by 509 · see citing works
Self-citationPit Pattern in Colorectal Neoplasia: Endoscopic Magnifying View
Kudo, S., Rubino, C., Teixeira, C., et al. (2004) · Endoscopy · doi:10.1055/s-2004-826104 · Cited by 503 · see citing works
Self-citationWang, P., Xiao, X., Brown, J. R. G., Berzin, T. M., Tu, M., Xiong, F., Hu, X., Liu, P., Song, Y., Zhang, D., et al. (2018) · Nature Biomedical Engineering · doi:10.1038/s41551-018-0301-3 · Cited by 484 · see citing works
Accurate Classification of Diminutive Colorectal Polyps Using Computer-Aided Analysis
Chen, P., Lin, M.-C., Lai, M.-J., Lin, J.-C., Lu, H. H., & Tseng, V. S. M. (2017) · Gastroenterology · doi:10.1053/j.gastro.2017.10.010 · Cited by 396 · see citing works
Artificial Intelligence-Assisted Polyp Detection for Colonoscopy: Initial Experience
Misawa, M., Kudo, S., Mori, Y., Cho, T., Kataoka, S., Yamauchi, A., Ogawa, Y., Maeda, Y., Takeda, K., Ichimasa, K., et al. (2018) · Gastroenterology · doi:10.1053/j.gastro.2018.04.003 · Cited by 395 · see citing works
Self-citationAbu Dayyeh, B. K., Thosani, N., Konda, V., Wallace, M. B., Rex, D. K., Chauhan, S. S., Hwang, J. H., Komanduri, S., Manfredi, M., Maple, J. T., et al. (2015) · Gastrointestinal Endoscopy · doi:10.1016/j.gie.2014.12.022 · Cited by 389 · see citing works
Kominami, Y., Yoshida, S., Tanaka, S., Sanomura, Y., Hirakawa, T., Raytchev, B., Tamaki, T., Koide, T., Kaneda, K., & Chayama, K. (2015) · Gastrointestinal Endoscopy · doi:10.1016/j.gie.2015.08.004 · Cited by 245 · see citing works
Ladabaum, U., Fioritto, A., Mitani, A., Desai, M., Kim, J. P., Rex, D. K., Imperiale, T., & Gunaratnam, N. (2013) · Gastroenterology · doi:10.1053/j.gastro.2012.09.054 · Cited by 224 · see citing works
Rees, C. J., Rajasekhar, P. T., Wilson, A., Close, H., Rutter, M. D., Saunders, B. P., East, J. E., Maier, R., Moorghen, M., Muhammad, U., et al. (2017) · Gut · doi:10.1136/gutjnl-2015-310584 · Cited by 211 · see citing works
Komeda, Y., Handa, H., Watanabe, T., Nomura, T., Kitahashi, M., Sakurai, T., Okamoto, A., Minami, T., Kono, M., Arizumi, T., et al. (2017) · Oncology · doi:10.1159/000481227 · Cited by 200 · see citing works
Computer-Aided Decision Support Systems for Endoscopy in the Gastrointestinal Tract: A Review
Liedlgruber, M., & Uhl, A. (2011) · IEEE Reviews in Biomedical Engineering · doi:10.1109/rbme.2011.2175445 · Cited by 175 · see citing works
Misawa, M., Kudo, S., Mori, Y., Nakamura, H., Kataoka, S., Maeda, Y., Kudo, T., Hayashi, T., Wakamura, K., Miyachi, H., et al. (2016) · Gastroenterology · doi:10.1053/j.gastro.2016.04.004 · Cited by 174 · see citing works
Self-citationComputer-aided diagnosis for colonoscopy
Mori, Y., Kudo, S., Berzin, T. M., Misawa, M., & Takeda, K. (2017) · Endoscopy · doi:10.1055/s-0043-109430 · Cited by 158 · see citing works
Self-citationNovel computer-aided diagnostic system for colorectal lesions by using endocytoscopy (with videos)
Mori, Y., Kudo, S., Wakamura, K., Misawa, M., Ogawa, Y., Kutsukawa, M., Kudo, T., Hayashi, T., Miyachi, H., Ishida, F., et al. (2014) · Gastrointestinal Endoscopy · doi:10.1016/j.gie.2014.09.008 · Cited by 147 · see citing works
Self-citationFernández-Esparrach, G., Bernal, J., López-Cerón, M., Córdova, H., Sánchez-Montes, C., Rodríguez de Miguel, C., & Sánchez, F. (2016) · Endoscopy · doi:10.1055/s-0042-108434 · Cited by 146 · see citing works
Computer-aided classification of colorectal polyps based on vascular patterns: a pilot study
Tischendorf, J. J. W., Gross, S., Winograd, R., Hecker, H., Auer, R., Behrens, A., Trautwein, C., Aach, T., & Stehlé, T. (2010) · Endoscopy · doi:10.1055/s-0029-1243861 · Cited by 140 · see citing works
Accuracy of diagnosing invasive colorectal cancer using computer-aided endocytoscopy
Takeda, K., Kudo, S., Mori, Y., Misawa, M., Kudo, T., Wakamura, K., Katagiri, A., Baba, T., Hidaka, E., Ishida, F., et al. (2017) · Endoscopy · doi:10.1055/s-0043-105486 · Cited by 140 · see citing works
Self-citationGroß, S., Trautwein, C., Behrens, A., Winograd, R., Palm, S., Lutz, H. H., Schirin-Sokhan, R., Hecker, H., Aach, T., & Tischendorf, J. J. W. (2011) · Gastrointestinal Endoscopy · doi:10.1016/j.gie.2011.08.001 · Cited by 135 · see citing works
Computer-aided colorectal tumor classification in NBI endoscopy using local features
Tamaki, T., Yoshimuta, J., Kawakami, M., Raytchev, B., Kaneda, K., Yoshida, S., Takemura, Y., Onji, K., Miyaki, R., & Tanaka, S. (2012) · Medical Image Analysis · doi:10.1016/j.media.2012.08.003 · Cited by 135 · see citing works
CoLD: a versatile detection system for colorectal lesions in endoscopy video-frames
Maroulis, D., Iakovidis, D. K., Karkanis, S. A., & Karras, D. A. (2003) · Computer Methods and Programs in Biomedicine · doi:10.1016/s0169-2607(02)00007-x · Cited by 134 · see citing works
Takemura, Y., Yoshida, S., Tanaka, S., Kawase, R., Onji, K., Oka, S., Tamaki, T., Raytchev, B., Kaneda, K., Yoshihara, M., et al. (2011) · Gastrointestinal Endoscopy · doi:10.1016/j.gie.2011.08.051 · Cited by 121 · see citing works
Mori, Y., Kudo, S., Chiu, P. W. Y., Singh, R., Misawa, M., Wakamura, K., Kudo, T., Hayashi, T., Katagiri, A., Miyachi, H., et al. (2016) · Endoscopy · doi:10.1055/s-0042-113609 · Cited by 112 · see citing works
Self-citationA Colon Video Analysis Framework for Polyp Detection
Park, S. Y., Sargent, D., Spofford, I. S., et al. (2012) · IEEE Transactions on Biomedical Engineering · doi:10.1109/tbme.2012.2188397 · Cited by 110 · see citing works
André, B. (2012) · World Journal of Gastroenterology · doi:10.3748/wjg.v18.i39.5560 · Cited by 82 · see citing works
Directional wavelet based features for colonic polyp classification
Wimmer, G., Tamaki, T., Tischendorf, J. J. W., Häfner, M., Yoshida, S., Tanaka, S., & Uhl, A. (2016) · Medical Image Analysis · doi:10.1016/j.media.2016.02.001 · Cited by 79 · see citing works
Part-Based Multiderivative Edge Cross-Sectional Profiles for Polyp Detection in Colonoscopy
Wang, Y., Tavanapong, W., Wong, J., et al. (2013) · IEEE Journal of Biomedical and Health Informatics · doi:10.1109/jbhi.2013.2285230 · Cited by 78 · see citing works
Mori, Y., Kudo, S., Ikehara, N., et al. (2013) · Endoscopy · doi:10.1055/s-0032-1325932 · Cited by 74 · see citing works
Self-citationRäth, T., Tontini, G. E., Vieth, M. W., Nägel, A., Neurath, M. F., & Neumann, H. (2016) · Endoscopy · doi:10.1055/s-0042-102251 · Cited by 73 · see citing works
Takemura, Y., Yoshida, S., Tanaka, S., Onji, K., Oka, S., Tamaki, T., Kaneda, K., Yoshihara, M., & Chayama, K. (2010) · Gastrointestinal Endoscopy · doi:10.1016/j.gie.2010.07.037 · Cited by 69 · see citing works
A Comprehensive Computer-Aided Polyp Detection System for Colonoscopy Videos
Tajbakhsh, N., Gurudu, S., & Liang, J. (2015) · Information Processing in Medical Imaging · doi:10.1007/978-3-319-19992-4_25 · Cited by 68 · see citing works
Aihara, H., Saito, S., Inomata, H., Ide, D., Tamai, N., Ohya, T. R., Kato, T., Amitani, S., & Tajiri, H. (2012) · European Journal of Gastroenterology & Hepatology · doi:10.1097/meg.0b013e32835c6d9a · Cited by 66 · see citing works
Computer Aided Diagnosis for Confocal Laser Endomicroscopy in Advanced Colorectal Adenocarcinoma
Ştefănescu, D., Streba, C. T., Cârțână, E. T., Săftoiu, A., Gruionu, G., & Gruionu, L. G. (2016) · PLoS ONE · doi:10.1371/journal.pone.0154863 · Cited by 66 · see citing works
Mori, Y., Kudo, S., Misawa, M., & Mori, K. (2019) · VideoGIE · doi:10.1016/j.vgie.2018.10.006 · Cited by 64 · see citing works
Self-citationFlat and Depressed Types of Early Colorectal Cancers: From East to West
Kudo, S., Takemura, O., & Ohtsuka, K. (2008) · Gastrointestinal Endoscopy Clinics of North America · doi:10.1016/j.giec.2008.05.013 · Cited by 54 · see citing works
Self-citationLocal fractal dimension based approaches for colonic polyp classification
Häfner, M., Tamaki, T., Tanaka, S., Uhl, A., Wimmer, G., & Yoshida, S. (2015) · Medical Image Analysis · doi:10.1016/j.media.2015.08.007 · Cited by 52 · see citing works
Automatic optical diagnosis of small colorectal lesions by laser-induced autofluorescence
Kuiper, T., Alderlieste, Y. A., Tytgat, K. M. A. J., Vlug, M. S., Nabuurs, J. A., Bastiaansen, B. A. J., Löwenberg, M., Fockens, P., & Dekker, E. (2014) · Endoscopy · doi:10.1055/s-0034-1378112 · Cited by 50 · see citing works
Kudo, S., Mori, Y., Wakamura, K., et al. (2013) · Journal of Gastroenterology and Hepatology · doi:10.1111/jgh.12374 · Cited by 48 · see citing works
Self-citationInomata, H. (2013) · World Journal of Gastroenterology · doi:10.3748/wjg.v19.i41.7146 · Cited by 47 · see citing works
New classification for probe-based confocal laser endomicroscopy in the colon
Kuiper, T., van den Broek, F., van Eeden, S., et al. (2011) · Endoscopy · doi:10.1055/s-0030-1256767 · Cited by 41 · see citing works
Symmetric Curvature Patterns for Colonic Polyp Detection
Jerebko, A. K., Lakare, S., Cathier, P., Periaswamy, S., & Bogoni, L. (2006) · Lecture notes in computer science · doi:10.1007/11866763_21 · Cited by 39 · see citing works
Regulatory Science on AI-based Medical Devices and Systems
Chinzei, K., Shimizu, A., Mori, K., Harada, K., Takeda, H., Hashizume, M., Ishizuka, M., Kato, N., Kawamori, R., Kyo, S., et al. (2018) · Advanced Biomedical Engineering · doi:10.14326/abe.7.118 · Cited by 35 · see citing works
Self-citationRenkoski, T. E., Banerjee, B., Graves, L., et al. (2013) · Journal of Biomedical Optics · doi:10.1117/1.jbo.18.1.016005 · Cited by 34 · see citing works
Improving Pit–Pattern Classification of Endoscopy Images by a Combination of Experts
Hafner, M. R., Gangl, A., Kwitt, R., et al. (2009) · Lecture notes in computer science · doi:10.1007/978-3-642-04268-3_31 · Cited by 28 · see citing works
Potential of artificial intelligence‐assisted colonoscopy using an endocytoscope (with video)
Mori, Y., Kudo, S., & Mori, K. (2018) · Digestive Endoscopy · doi:10.1111/den.13005 · Cited by 26 · see citing works
Self-citationSVM-MRF segmentation of colorectal NBI endoscopic images
Hirakawa, T., Tamaki, T., Raytchev, B., et al. (2014) · doi:10.1109/embc.2014.6944683 · Cited by 20 · see citing works
An adaptive paradigm for computer-aided detection of colonic polyps
Wang, H., Liang, Z., Li, L. C., Han, H., Song, B., Pickhardt, P. J., Barish, M. A., & Lascarides, C. E. (2015) · Physics in Medicine and Biology · doi:10.1088/0031-9155/60/18/7207 · Cited by 19 · see citing works
Regulatory Approval versus Clinical Validation of Artificial Intelligence Diagnostic Tools
Park, S. H. (2018) · Radiology · doi:10.1148/radiol.2018181310 · Cited by 19 · see citing works
Semi-automated Query Construction for Content-Based Endomicroscopy Video Retrieval
Tafreshi, M. K., Linard, N., André, B., Ayache, N., & Vercauteren, T. K. (2014) · Lecture notes in computer science · doi:10.1007/978-3-319-10404-1_12 · Cited by 16 · see citing works
Prieto, S. P., Lai, K., Laryea, J. A., et al. (2016) · Journal of medical imaging · doi:10.1117/1.jmi.3.2.024502 · Cited by 16 · see citing works
Plagianakos, V. P., Magoulas, G. D., & Vrahatis, M. N. (2006) · Computer Methods and Programs in Biomedicine · doi:10.1016/j.cmpb.2005.11.005 · Cited by 12 · see citing works
Okamoto, T., Koide, T., Koki, S., et al. (2015) · doi:10.1109/embc.2015.7319022 · Cited by 11 · see citing works
Mitsuyama, K. (2011) · Oncology Reports · doi:10.3892/or.2011.1287 · Cited by 9 · see citing works
Du, N., Wang, X., Guo, J., et al. (2016) · PLoS ONE · doi:10.1371/journal.pone.0155371 · Cited by 9 · see citing works
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- Authors
- Kudo, S., Mori, Y., Misawa, M., Takeda, K., Kudo, T., Itoh, H., Oda, M., & Mori, K.
- Affiliations
- SHOWA Medical University Northern Yokohama Hospital (JP)
- Nagoya University (JP)
- Corresponding author
- Kudo, Shin‐ei
- Venue
- Digestive Endoscopy
- Publisher
- Wiley
- Published
- 2019-02-27
- Volume
- 31
- Issue
- 4
- Pages
- 363-371
- ISSN
- 0915-5635 (ISSN-L)
- 1443-1661
- OpenAlex
- W2909293781
- Cited by
- 147
- References
- 66
- Citations by year
- 2026: 8 · 2025: 15 · 2024: 10 · 2023: 20 · 2022: 18 · 2021: 30 · 2020: 30 · 2019: 13 · 2014: 1
- FWCI
- 2.17
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Digestive Endoscopy (publishedVersion)
- PubMed (publishedVersion)
- Funders
- American Society for Gastrointestinal Endoscopy
- U.S. Food and Drug Administration
- Japan Society for the Promotion of Science (19KK0421, 19K08403)
- Topics
- Health Sciences › Medicine › Oncology › Colorectal Cancer Screening and Detection
- Physical Sciences › Computer Science › Artificial Intelligence › AI in cancer detection
- Health Sciences › Medicine › Health Informatics › Artificial Intelligence in Healthcare and Education
- Keywords
- artificial intelligence, colonoscopy, computer-aided diagnosis, polyp characterization, adenoma detection rate, optical biopsy, hyperplastic polyps, polypectomy, regulatory approval
- MeSH terms
- Artificial Intelligence, Colonic Polyps, Colonoscopy, Diagnosis, Computer-Assisted, Diagnostic Errors, Forecasting, Humans, Colorectal Neoplasms, Quality Improvement
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