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A Comprehensive Computer-Aided Polyp Detection System for Colonoscopy Videos.
Inf Process Med Imaging. 2015; 24:327-38.IP

Abstract

Computer-aided detection (CAD) can help colonoscopists reduce their polyp miss-rate, but existing CAD systems are handicapped by using either shape, texture, or temporal information for detecting polyps, achieving limited sensitivity and specificity. To overcome this limitation, our key contribution of this paper is to fuse all possible polyp features by exploiting the strengths of each feature while minimizing its weaknesses. Our new CAD system has two stages, where the first stage builds on the robustness of shape features to reliably generate a set of candidates with a high sensitivity, while the second stage utilizes the high discriminative power of the computationally expensive features to effectively reduce false positives. Specifically, we employ a unique edge classifier and an original voting scheme to capture geometric features of polyps in context and then harness the power of convolutional neural networks in a novel score fusion approach to extract and combine shape, color, texture, and temporal information of the candidates. Our experimental results based on FROC curves and a new analysis of polyp detection latency demonstrate a superiority over the state-of-the-art where our system yields a lower polyp detection latency and achieves a significantly higher sensitivity while generating dramatically fewer false positives. This performance improvement is attributed to our reliable candidate generation and effective false positive reduction methods.

Authors

No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

26221684

Citation

Tajbakhsh, Nima, et al. "A Comprehensive Computer-Aided Polyp Detection System for Colonoscopy Videos." Information Processing in Medical Imaging : Proceedings of the ... Conference, vol. 24, 2015, pp. 327-38.
Tajbakhsh N, Gurudu SR, Liang J. A Comprehensive Computer-Aided Polyp Detection System for Colonoscopy Videos. Inf Process Med Imaging. 2015;24:327-38.
Tajbakhsh, N., Gurudu, S. R., & Liang, J. (2015). A Comprehensive Computer-Aided Polyp Detection System for Colonoscopy Videos. Information Processing in Medical Imaging : Proceedings of the ... Conference, 24, 327-38.
Tajbakhsh N, Gurudu SR, Liang J. A Comprehensive Computer-Aided Polyp Detection System for Colonoscopy Videos. Inf Process Med Imaging. 2015;24:327-38. PubMed PMID: 26221684.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - A Comprehensive Computer-Aided Polyp Detection System for Colonoscopy Videos. AU - Tajbakhsh,Nima, AU - Gurudu,Suryakanth R, AU - Liang,Jianming, PY - 2015/7/30/entrez PY - 2015/7/30/pubmed PY - 2015/10/1/medline SP - 327 EP - 38 JF - Information processing in medical imaging : proceedings of the ... conference JO - Inf Process Med Imaging VL - 24 N2 - Computer-aided detection (CAD) can help colonoscopists reduce their polyp miss-rate, but existing CAD systems are handicapped by using either shape, texture, or temporal information for detecting polyps, achieving limited sensitivity and specificity. To overcome this limitation, our key contribution of this paper is to fuse all possible polyp features by exploiting the strengths of each feature while minimizing its weaknesses. Our new CAD system has two stages, where the first stage builds on the robustness of shape features to reliably generate a set of candidates with a high sensitivity, while the second stage utilizes the high discriminative power of the computationally expensive features to effectively reduce false positives. Specifically, we employ a unique edge classifier and an original voting scheme to capture geometric features of polyps in context and then harness the power of convolutional neural networks in a novel score fusion approach to extract and combine shape, color, texture, and temporal information of the candidates. Our experimental results based on FROC curves and a new analysis of polyp detection latency demonstrate a superiority over the state-of-the-art where our system yields a lower polyp detection latency and achieves a significantly higher sensitivity while generating dramatically fewer false positives. This performance improvement is attributed to our reliable candidate generation and effective false positive reduction methods. SN - 1011-2499 UR - https://www.unboundmedicine.com/medline/citation/26221684/A_Comprehensive_Computer_Aided_Polyp_Detection_System_for_Colonoscopy_Videos_ L2 - https://medlineplus.gov/colonicpolyps.html DB - PRIME DP - Unbound Medicine ER -