Computer-based Classification of Colorectal Polyps Using Narrow-band Imaging

June 15, 2011 updated by: Tischendorf, Jens, M.D.

Computer-based Classification of Small Colorectal Polyps

Recent studies have shown that narrow-band imaging (NBI) is a powerful diagnostic tool for the differentiation between neoplastic and non-neoplastic colorectal polyps. The aim of the present study is to develop and evaluate a computer-based method for automated classification of small colorectal polyps on the basis of vascularization features.In a prospective study 207 polyps with a size of 10mm or smaller should be detected by a zoom NBI colonoscopy. These polyps were imaged and subsequently removed for histological analysis. the polyp images were analyzed by a computer algorithm. The proposed computer-based method consists of several steps: preprocessing, vessel segmentation, feature extraction and classification. The results of the automatic classification (sensitivity, specificity, negative predictive value, positive predictive value and accuracy)were compared to those of human observers, who were blinded to the histological gold standard.

Study Overview

Status

Completed

Conditions

Study Type

Observational

Enrollment (Actual)

434

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Germany
      • Aachen, Germany, 52074
        • Department of Medicine III, University Hospital Aachen (RWTH)

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

18 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Sampling Method

Probability Sample

Study Population

patients who underwent colonoscopy and colorectal polyps with a size of 10mm or smaller were detected

Description

Inclusion Criteria:

  • All patients who did not meet the exclusion criteria were included in the study

Exclusion Criteria:

  • Patients with chronic inflammatory bowel disease, adenomatosis coli, coagulopathy, insufficient bowel preparation, or previous colonoscopy within the last 3 years; age under 18 years; no written informed consent for participation in the study

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

Cohorts and Interventions

Group / Cohort
patients with colorectal polyps

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Time Frame
diagnostic value (sensitivity, specificity, negative predictive value, positive predictive value, accuracy)
Time Frame: 10 months
10 months

Secondary Outcome Measures

Outcome Measure
Time Frame
interobserver variability
Time Frame: 10 months
10 months

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Tischendorf, Jens, M.D.

Investigators

  • Principal Investigator: Jens Tischendorf, M.D., Medical Department III, University Hospital Aachen (RWTH), Pauwelsstr. 30, 52074 Aachen

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

May 1, 2010

Primary Completion (Actual)

February 1, 2011

Study Completion (Actual)

March 1, 2011

Study Registration Dates

First Submitted

December 15, 2010

First Submitted That Met QC Criteria

December 15, 2010

First Posted (Estimate)

December 17, 2010

Study Record Updates

Last Update Posted (Estimate)

June 16, 2011

Last Update Submitted That Met QC Criteria

June 15, 2011

Last Verified

June 1, 2011

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • Ti-NBI

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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