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Erschienen in: International Journal of Computer Assisted Radiology and Surgery 5/2017

28.02.2017 | Original Article

Accuracy of computer-aided diagnosis based on narrow-band imaging endocytoscopy for diagnosing colorectal lesions: comparison with experts

verfasst von: Masashi Misawa, Shin-ei Kudo, Yuichi Mori, Kenichi Takeda, Yasuharu Maeda, Shinichi Kataoka, Hiroki Nakamura, Toyoki Kudo, Kunihiko Wakamura, Takemasa Hayashi, Atsushi Katagiri, Toshiyuki Baba, Fumio Ishida, Haruhiro Inoue, Yukitaka Nimura, Msahiro Oda, Kensaku Mori

Erschienen in: International Journal of Computer Assisted Radiology and Surgery | Ausgabe 5/2017

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Abstract

Purpose

Real-time characterization of colorectal lesions during colonoscopy is important for reducing medical costs, given that the need for a pathological diagnosis can be omitted if the accuracy of the diagnostic modality is sufficiently high. However, it is sometimes difficult for community-based gastroenterologists to achieve the required level of diagnostic accuracy. In this regard, we developed a computer-aided diagnosis (CAD) system based on endocytoscopy (EC) to evaluate cellular, glandular, and vessel structure atypia in vivo. The purpose of this study was to compare the diagnostic ability and efficacy of this CAD system with the performances of human expert and trainee endoscopists.

Methods

We developed a CAD system based on EC with narrow-band imaging that allowed microvascular evaluation without dye (ECV-CAD). The CAD algorithm was programmed based on texture analysis and provided a two-class diagnosis of neoplastic or non-neoplastic, with probabilities. We validated the diagnostic ability of the ECV-CAD system using 173 randomly selected EC images (49 non-neoplasms, 124 neoplasms). The images were evaluated by the CAD and by four expert endoscopists and three trainees. The diagnostic accuracies for distinguishing between neoplasms and non-neoplasms were calculated.

Results

ECV-CAD had higher overall diagnostic accuracy than trainees (87.8 vs 63.4%; \(P=0.01\)), but similar to experts (87.8 vs 84.2%; \(P=0.76\)). With regard to high-confidence cases, the overall accuracy of ECV-CAD was also higher than trainees (93.5 vs 71.7%; \(P<0.001\)) and comparable to experts (93.5 vs 90.8%; \(P=0.38\)).

Conclusions

ECV-CAD showed better diagnostic accuracy than trainee endoscopists and was comparable to that of experts. ECV-CAD could thus be a powerful decision-making tool for less-experienced endoscopists.
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Metadaten
Titel
Accuracy of computer-aided diagnosis based on narrow-band imaging endocytoscopy for diagnosing colorectal lesions: comparison with experts
verfasst von
Masashi Misawa
Shin-ei Kudo
Yuichi Mori
Kenichi Takeda
Yasuharu Maeda
Shinichi Kataoka
Hiroki Nakamura
Toyoki Kudo
Kunihiko Wakamura
Takemasa Hayashi
Atsushi Katagiri
Toshiyuki Baba
Fumio Ishida
Haruhiro Inoue
Yukitaka Nimura
Msahiro Oda
Kensaku Mori
Publikationsdatum
28.02.2017
Verlag
Springer International Publishing
Erschienen in
International Journal of Computer Assisted Radiology and Surgery / Ausgabe 5/2017
Print ISSN: 1861-6410
Elektronische ISSN: 1861-6429
DOI
https://doi.org/10.1007/s11548-017-1542-4

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