1,566 research outputs found
CT colonography (virtual colonoscopy)
Thin-section multi–detector row
computed tomographic (CT)
colonography is a powerful tool for the
detection and classification of colonic
lesions.
Isotropic imaging (ie equal voxel
size in all three planes) of the colon with
thin collimation has become standard
and provides high-quality multi-planar
reformatted (MPR) images and three dimensional
(3D) assessment of the
entire colon, while allowing excellent
visualisation of all other intra-abdominal
organs.peer-reviewe
Detection of Polyps via Shape and Appearance Modeling
Presented at the MICCAI 2008 Workshop on Computational and Visualization Challenges in the New Era of Virtual Colonoscopy, September 6, 2008, New York, USA.This paper describes a CAD system for the detection of colorectal polyps in CT. It is based on stochastic shape and appearance modeling of structures of the colon and rectum, in contrast to the data-driven approaches more commonly found in the literature it derives predictive stochastic models for the features used for classification. The method makes extensive use of medical domain knowledge in the design of the models and in the setting of their parameters. The proposed approach was successfully tested on challenging datasets acquired under a protocol with little colonic preparation; such protocol reduces patient discomfort and potentially improves compliance
Preoperative staging of colorectal cancer using virtual colonoscopy: correlation with surgical results
The aim of this study was to evaluate the clinical usefulness of computed tomography colonography (CTC) in the preoperative staging in patients with abdominal pain for occlusive colorectal cancer (CRC) and to compare the results of CTC with the surgical ones
Focal Spot, Spring 1999
https://digitalcommons.wustl.edu/focal_spot_archives/1081/thumbnail.jp
Colon centreline calculation for CT colonography using optimised 3D opological thinning
CT colonography is an emerging technique for colorectal
cancer screening. This technique facilitates noninvasive
imaging of the colon interior by generating virtual
reality models of the colon lumen. Manual navigation
through these models is a slow and tedious process.
It is possible to automate navigation by calculating the centreline
of the colon lumen. There are numerous well documented
approaches for centreline calculation. Many of
these techniques have been developed as alternatives to 3D
topological thinning which has been discounted by others
due to its computationally intensive nature. This paper describes
a fully automated, optimised version of 3D topological
thinning that has been specifically developed for calculating
the centreline of the human colon
- …