Adaptive remapping procedure for electronic cleansing of fecal tagging CT colonography images

Lia Morra; Silvia Delsanto; Delia Campanella M.D.; Daniele Regge M.D.; Alberto Bert

doi:10.1117/12.811512

3 March 2009 Adaptive remapping procedure for electronic cleansing of fecal tagging CT colonography images

Lia Morra, Silvia Delsanto, Delia Campanella M.D., Daniele Regge M.D., Alberto Bert

Proceedings Volume 7260, Medical Imaging 2009: Computer-Aided Diagnosis; 72602O (2009) https://doi.org/10.1117/12.811512
Event: SPIE Medical Imaging, 2009, Lake Buena Vista (Orlando Area), Florida, United States

Abstract

Fecal tagging preparations are attracting notable interest as a way to increase patients' compliance to virtual colonoscopy. Patient-friendly preparations, however, often result in less homogeneous tagging. Electronic cleansing algorithms should be capable of dealing with such preparations and yield good quality 2D and 3D images; moreover, successful electronic cleansing lays the basis for the application of Computer Aided Detection schemes. In this work, we present a cleansing algorithm based on an adaptive remapping procedure, which is based on a model of how partial volume affects both the air-tissue and the soft-tissue interfaces. Partial volume at the stool-soft tissue interface is characterized in terms of the local characteristics of tagged regions, in order to account for variations in tagging intensity throughout the colon. The two models are then combined in order to obtain a remapping equation relating the observed intensity to the that of the cleansed colon. The electronic cleansed datasets were then processed by a CAD scheme composed of three main steps: colon surface extraction, polyp candidate segmentation through curvature-based features, and linear classifier-based discrimination between true polyps and false alarms. Results obtained were compared with a previous version of the cleansing algorithm, in which a simpler remapping procedure was used. Performances are increased both in terms of the visual quality of the 2D cleansed images and 3D rendered volumes, and of CAD performances on a sameday FT virtual colonoscopy dataset.

Citation Download Citation

Lia Morra, Silvia Delsanto, Delia Campanella M.D., Daniele Regge M.D., and Alberto Bert "Adaptive remapping procedure for electronic cleansing of fecal tagging CT colonography images", Proc. SPIE 7260, Medical Imaging 2009: Computer-Aided Diagnosis, 72602O (3 March 2009); https://doi.org/10.1117/12.811512

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
9 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Colon

Fourier transforms

Bone

Image segmentation

Virtual colonoscopy

Computer aided design

Tissues

Show All Keywords

Keywords/Phrases

Search In:

Publication Years