The impact of three-dimensional imaging on polyp detection during colonoscopy: a proof of concept study

Sakata, Shinichiro; Grove, Philip M.; Stevenson, Andrew; Hewett, David G.

doi:10.1136/gutjnl-2016-311507

Cited by 15 publications

(10 citation statements)

References 11 publications

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“…Given the high risk of intraoperative complications during procedures performed by inexperienced laparoscopists 21 -25 and the precision data reported here, current evidence supports the integration of 3D displays into trainees' early operative experiences and training to reduce the risk of these complications arising from imprecise depth judgements. Similarly, in the context of simulated colonoscopy, 3D displays have been shown to improve immediately the detection of diminutive, minimally elevated lesions by trainee endoscopists 26 . The present accuracy findings also demonstrate the relatively high visual fidelity of modern 3D laparoscopic displays.…”

Section: Discussionmentioning

confidence: 99%

Impact of simulated three-dimensional perception on precision of depth judgements, technical performance and perceived workload in laparoscopy

Sakata

Grove

Hill

et al. 2017

British Journal of Surgery

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BackgroundThis study compared precision of depth judgements, technical performance and workload using two‐dimensional (2D) and three‐dimensional (3D) laparoscopic displays across different viewing distances. It also compared the accuracy of 3D displays with natural viewing, along with the relationship between stereoacuity and 3D laparoscopic performance.MethodsA counterbalanced within‐subjects design with random assignment to testing sequences was used. The system could display 2D or 3D images with the same set‐up. A Howard–Dolman apparatus assessed precision of depth judgements, and three laparoscopic tasks (peg transfer, navigation in space and suturing) assessed performance (time to completion). Participants completed tasks in all combinations of two viewing modes (2D, 3D) and two viewing distances (1 m, 3 m). Other measures administered included the National Aeronautics and Space Administration Task Load Index (perceived workload) and the Randot® Stereotest (stereoacuity).ResultsDepth judgements were 6·2 times as precise at 1 m and 3·0 times as precise at 3 m using 3D versus 2D displays (P < 0·001). Participants performed all laparoscopic tasks faster in 3D at both 1 and 3 m (P < 0.001), with mean completion times up to 64 per cent shorter for 3D versus 2D displays. Workload was lower for 3D displays (up to 34 per cent) than for 2D displays at both viewing distances (P < 0·001). Greater viewing distance inhibited performance for two laparoscopic tasks, and increased perceived workload for all three (P < 0·001). Higher stereoacuity was associated with shorter completion times for the navigating in space task performed in 3D at 1 m (r = − 0·40, P = 0·001).Conclusion 3D displays offer large improvements over 2D displays in precision of depth judgements, technical performance and perceived workload.

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Section: Discussionmentioning

confidence: 99%

Impact of simulated three-dimensional perception on precision of depth judgements, technical performance and perceived workload in laparoscopy

Sakata

Grove

Hill

et al. 2017

British Journal of Surgery

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“…71 Preliminary simulation suggests an increased detection of non-polypoid lesions by up to 25% amongst trainee endoscopists in a simulator environment compared to conventional 2D images obtained in WLE. 72…”

Section: Three-dimensional Imagingmentioning

confidence: 99%

The future of endoscopy: Advances in endoscopic image innovations

Gulati

Patel

Emmanuel

et al. 2019

Digestive Endoscopy

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The latest state of the art technological innovations have led to a palpable progression in endoscopic imaging and may facilitate standardisation of practice. One of the most rapidly evolving modalities is artificial intelligence with recent studies providing real-time diagnoses and encouraging results in the first randomised trials to conventional endoscopic imaging. Advances in functional hypoxia imaging offer novel opportunities to be used to detect neoplasia and the assessment of colitis. Three-dimensional volumetric imaging provides spatial information and has shown promise in the increased detection of small polyps. Studies to date of self-propelling colonoscopes demonstrate an increased caecal intubation rate and possibly offer patients a more comfortable procedure. Further development in robotic technology has introduced ex vivo automated locomotor upper gastrointestinal and small bowel capsule devices. Eye-tracking has the potential to revolutionise endoscopic training through the identification of differences in experts and non-expert endoscopist as trainable parameters. In this review, we discuss the latest innovations of all these technologies and provide perspective into the exciting future of diagnostic luminal endoscopy.

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“…Furthermore, because CE is a wireless minimally invasive system, information is mainly obtained as videos and images. 3D information could facilitate more detailed diagnostic evaluation of lesions seen 17 . Due to the difficulty in accessing the human small-bowel, more invasive investigations or procedures such as deep enteroscopy should be optimally planned.…”

Section: Discussionmentioning

confidence: 99%

Novel experimental and software methods for image reconstruction and localization in capsule endoscopy

et al. 2018

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Background and study aims Capsule endoscopy (CE) is invaluable for minimally invasive endoscopy of the gastrointestinal tract; however, several technological limitations remain including lack of reliable lesion localization. We present an approach to 3D reconstruction and localization using visual information from 2D CE images. Patients and methods Colored thumbtacks were secured in rows to the internal wall of a LifeLike bowel model. A PillCam SB3 was calibrated and navigated linearly through the lumen by a high-precision robotic arm. The motion estimation algorithm used data (light falling on the object, fraction of reflected light and surface geometry) from 2D CE images in the video sequence to achieve 3D reconstruction of the bowel model at various frames. The ORB-SLAM technique was used for 3D reconstruction and CE localization within the reconstructed model. This algorithm compared pairs of points between images for reconstruction and localization. Results As the capsule moved through the model bowel 42 to 66 video frames were obtained per pass. Mean absolute error in the estimated distance travelled by the CE was 4.1 ± 3.9 cm. Our algorithm was able to reconstruct the cylindrical shape of the model bowel with details of the attached thumbtacks. ORB-SLAM successfully reconstructed the bowel wall from simultaneous frames of the CE video. The “track” in the reconstruction corresponded well with the linear forwards-backwards movement of the capsule through the model lumen. Conclusion The reconstruction methods, detailed above, were able to achieve good quality reconstruction of the bowel model and localization of the capsule trajectory using information from the CE video and images alone.

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The impact of three-dimensional imaging on polyp detection during colonoscopy: a proof of concept study

Cited by 15 publications

References 11 publications

Impact of simulated three-dimensional perception on precision of depth judgements, technical performance and perceived workload in laparoscopy

Impact of simulated three-dimensional perception on precision of depth judgements, technical performance and perceived workload in laparoscopy

The future of endoscopy: Advances in endoscopic image innovations

Novel experimental and software methods for image reconstruction and localization in capsule endoscopy

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