Automatic lumen detection and magnetic alignment control for magnetic-assisted capsule colonoscope system optimization

Sheng Yang Yen, Hao En Huang, Gi Shih Lien, Chih Wen Liu, Chia Feng Chu, Wei Ming Huang, Fat Moon Suk

研究成果: 雜誌貢獻文章同行評審

摘要

We developed a magnetic-assisted capsule colonoscope system with integration of computer vision-based object detection and an alignment control scheme. Two convolutional neural network models A and B for lumen identification were trained on an endoscopic dataset of 9080 images. In the lumen alignment experiment, models C and D used a simulated dataset of 8414 images. The models were evaluated using validation indexes for recall (R), precision (P), mean average precision (mAP), and F1 score. Predictive performance was evaluated with the area under the P-R curve. Adjustments of pitch and yaw angles and alignment control time were analyzed in the alignment experiment. Model D had the best predictive performance. Its R, P, mAP, and F1 score were 0.964, 0.961, 0.961, and 0.963, respectively, when the area of overlap/area of union was at 0.3. In the lumen alignment experiment, the mean degrees of adjustment for yaw and pitch in 160 trials were 21.70° and 13.78°, respectively. Mean alignment control time was 0.902 s. Finally, we compared the cecal intubation time between semi-automated and manual navigation in 20 trials. The average cecal intubation time of manual navigation and semi-automated navigation were 9 min 28.41 s and 7 min 23.61 s, respectively. The automatic lumen detection model, which was trained using a deep learning algorithm, demonstrated high performance in each validation index.
原文英語
文章編號6460
期刊Scientific Reports
11
發行號1
DOIs
出版狀態已發佈 - 十二月 2021

ASJC Scopus subject areas

  • General

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