Measurement of colonic polyp size from virtual colonoscopy studies: comparison of manual and automated methods

Metin N. Gurcan; Randy Ernst M.D.; Aytekin Oto M.D.; Steve Worrell; Jeff Hoffmeister M.D.; Steve Rogers

doi:10.1117/12.653192

15 March 2006 Measurement of colonic polyp size from virtual colonoscopy studies: comparison of manual and automated methods

Metin N. Gurcan, Randy Ernst M.D., Aytekin Oto M.D., Steve Worrell, Jeff Hoffmeister M.D., Steve Rogers

Author Affiliations +

Proceedings Volume 6144, Medical Imaging 2006: Image Processing; 61445B (2006) https://doi.org/10.1117/12.653192
Event: Medical Imaging, 2006, San Diego, California, United States

Abstract

Polyp size is an important feature descriptor for clinical classification and follow-up decision making in CT colonography. Currently, polyp size is measured from computed tomography (CT) studies manually as the single largest dimension of the polyp head, excluding the stalk if present, in either multi-planar reconstruction (MPR) or three-dimensional (3D) views. Manual measurements are subject to intra- and inter-reader variation, and can be time-consuming. Automated polyp segmentation and size measurement can reduce the variability and speed up the process. In this study, an automated polyp size measurement technique is developed. Using this technique, the polyp is segmented from the attached healthy tissue using a novel, model-based approach. The largest diameter of the segmented polyp is measured in axial, sagitttal and coronal MPR views. An expert radiologist identified 48 polyps from either supine or prone views of 52 cases of the Walter-Reed virtual colonoscopy database. Automated polyp size measurements were carried out and compared with the manual ones. For comparison, three different statistical methods were used: overall agreement using chance-corrected kappa indices; the mean absolute differences; and Bland-Altman limits of agreement. Manual and automated measurements show good agreement both in 2D and 3D views.

Citation Download Citation

Metin N. Gurcan, Randy Ernst M.D., Aytekin Oto M.D., Steve Worrell, Jeff Hoffmeister M.D., and Steve Rogers "Measurement of colonic polyp size from virtual colonoscopy studies: comparison of manual and automated methods", Proc. SPIE 6144, Medical Imaging 2006: Image Processing, 61445B (15 March 2006); https://doi.org/10.1117/12.653192

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
12 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Image segmentation

3D metrology

Virtual colonoscopy

3D vision

Colon

Statistical methods

Computed tomography

Show All Keywords

Keywords/Phrases

Search In:

Publication Years