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Colon capsule endoscopy versus CT colonography after incomplete colonoscopy. Application of artificial intelligence algorithms to identify complete colonic investigations.

ABSTRACT: BACKGROUND:Guidelines suggest computed tomography colonography (CTC) following incomplete optical colonoscopy (OC). Colon capsule endoscopies (CCE) have been suggested as an alternative, although completion rates have been unsatisfactory. Introduction of artificial intelligence (AI)-based localization algorithms of the camera capsules may enable identification of incomplete CCE investigations overlapping with incomplete OCs. OBJECTIVE:The study aims to investigate relative sensitivity of CCE compared with CTC following incomplete OC, investigate the completion rate when combining results from the incomplete OC and CCE, and develop a forward-tracking algorithm ensuring a safe completeness of combined investigations. METHODS:In this prospective paired study, patients with indication for CTC following incomplete OC were included for CCE and CTC. Location of CCE abortion and OC abortion were registered to identify complete combined investigations. AI-based algorithm for localization of capsules were developed reconstructing the passage of the colon. RESULTS:In 237 individuals with CTC indication; 105 were included, of which 97 underwent both a CCE and CTC. CCE was complete in 66 (68%). Including CCEs which reached most oral point of incomplete OC, 73 (75%) had complete colonic investigations; 78 (80%) had conclusive investigations. Relative sensitivity of CCE compared with CTC was 2.67 (95% confidence interval (CI) 1.76;4.04) for polyps >5 mm and 1.91 (95% CI 1.18;3.09) for polyps >9 mm. An AI-based algorithm was developed. CONCLUSION:Sensitivity of CCE following incomplete OC was superior to CTC. Introducing and improving algorithm-based localization of capsule abortion may increase identification of overall complete investigation rates following incomplete OC.ClinicalTrials.gov identifier: NCT02826993.

SUBMITTER: Deding U

PROVIDER: S-EPMC7435000 | biostudies-literature | 2020 Aug

REPOSITORIES: biostudies-literature

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Colon capsule endoscopy versus CT colonography after incomplete colonoscopy. Application of artificial intelligence algorithms to identify complete colonic investigations.

Deding U U Herp J J Havshoei A-L AL Kobaek-Larsen M M Buijs M M MM Nadimi E S ES Baatrup G G

United European gastroenterology journal 20200801 7

<h4>Background</h4>Guidelines suggest computed tomography colonography (CTC) following incomplete optical colonoscopy (OC). Colon capsule endoscopies (CCE) have been suggested as an alternative, although completion rates have been unsatisfactory. Introduction of artificial intelligence (AI)-based localization algorithms of the camera capsules may enable identification of incomplete CCE investigations overlapping with incomplete OCs.<h4>Objective</h4>The study aims to investigate relative sensiti ...[more]

PMID: 32731841

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Project description:BACKGROUND: Concerns about the risk of bowel perforation for same-day computed tomography colonography (CTC) following an incomplete colonoscopy with polypectomy may lead to unnecessarily postponing the CTC. OBJECTIVE: The objective of this article is to describe the complications including colon perforations associated with same-day CTC in a cohort who had polypectomies but an incomplete colonoscopy. DESIGN: We conducted a retrospective study. SETTING: Our study took place in a single, tertiary referral center. PATIENTS: We studied consecutive patients who had CTC the same day as an incomplete colonoscopy with polypectomy. INTERVENTIONS: Interventions included optical colonoscopy (OC), endoscopic polypectomies, and same-day CTC. MAIN OUTCOME MEASUREMENTS: Our main outcome measurements included perforation rate with long-term follow-up. RESULTS: A total of 3% of patients undergoing colonoscopy from January 2008 to December 2012 had same-day CTC following incomplete OC, and 72 polypectomies were performed in 34 (or 17%) of these patients. Incomplete colonoscopies were due to colon tortuosity and looping (25), severe angulations (five), colon mass (two), colon stenosis (one), bradycardia (one). Fifty-three percent of the OCs were screening for colon neoplasia, 29% diagnostic and 18% were surveillance of colon polyps. Most polyps were ≤ 5 mm, and found in the left colon. There were no reported complications or perforations associated with same-day CTCs during short- and long-term follow-up. LIMITATIONS: Limitations of our analysis included retrospective single-center design, small number of patients for the occurrence, referral to same-day CTC was not standardized, inability to establish safety of CTC for specific scenarios such as after complex polypectomies, strictures, or advanced IBD. CONCLUSIONS: Radiologists' apprehension to perform a CTC the same day as an incomplete colonoscopy following polypectomies because of perceived risk of perforation may be unfounded. More data are needed to determine the safety of same-day CTC in patients with high-risk findings during colonoscopy such as a stricture, severe IBD, and after complex polypectomies.

Project description:Colorectal cancer (CRC) is the second most common cause of cancer-related death in the Western world, with 500000 deaths per year worldwide. Colonoscopy is accepted as a primary CRC screening tool in many countries. As a preventative procedure, its main purpose is to enable the early diagnosis of CRC at a curable stage and to identify and remove pre-malignant adenomas. Cecal intubation is associated with an increased detection rate of advanced neoplasia, as 33-50% of advanced neoplasia is located in the proximal colon. Complete colonic evaluation is therefore a well-recognized measure of colonoscopy quality control. Cecal intubation rates of ≥ 90% of all colonoscopies in routine clinical practice and ≥ 95% in screening colonoscopies are recommended. Unfortunately, the cecal intubation rate in daily clinical practice is often lower than the target of ≥ 90%, with reported percentages varying from 76.9% to 98.4%. This means that after an incomplete colonoscopy, malignant and pre-malignant lesions may be missed if further investigation is not pursued. Several explanatory factors for incomplete colonoscopy have been described. After an incomplete conventional colonoscopy, patients are required to undergo another test to complete the visualization of the colon. Options for incomplete examinations because of anatomic reasons include both radiologic and endoscopic means. CT Colonography (CTC ) permits to visualise the whole colon, is minimally invasive, does not require sedation and is well accepted by the patient. The PillCam Colon Capsule Endoscopy (Given Diagnostic System)offers an alternative approach for endoscopic visualization of the colon in patients with an incomplete conventional colonoscopy. Advantages of the PillCam Colon Capsule Endoscopy (PCCE) include the elimination of the need for sedation, the minimally invasive, painless nature of the exam, no need of X-rays and the ability to pursue normal daily activities immediately following the procedure. This is a study that is designed to evaluate the performance of the PCCE in the evaluation of patients with an incomplete colonoscopy, compared to the CT-colonography. PCCE and CT-colonography procedures will be compared in regards to completeness of the procedure and detection of lesions in the colon that would have been missed by the incomplete conventional colonoscopy.

Dataset Information

Colon capsule endoscopy versus CT colonography after incomplete colonoscopy. Application of artificial intelligence algorithms to identify complete colonic investigations.

Publications

Colon capsule endoscopy versus CT colonography after incomplete colonoscopy. Application of artificial intelligence algorithms to identify complete colonic investigations.

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