Fast pseudo-enhancement correction in CT colonography using linear shift-invariant filters

Boyes, R., Slabaugh, G.G. & Beddoe, G. (2009). Fast pseudo-enhancement correction in CT colonography using linear shift-invariant filters. Paper presented at the 16th IEEE International Conference on Image Processing (ICIP), 2009., 07-11-2009 - 10-11-2009, Cairo, Eygpt.

[img]
Preview
PDF - Accepted Version
Download (716kB) | Preview

Abstract

This paper presents a novel method to approximate shift-variant Gaussian filtering of an image using a set of shift-invariant Gaussian filters. This approximation affords filtering of the image using fast convolution techniques that rely on the FFT, while achieving a result that closely matches the shift-variant result. We demonstrate the method in a CT colonography application that reduces the pseudo-enhancement effect, which is a local brightening artifact in CT imaging that can result from the use of oral contrast agents. Experimental results demonstrate the effectiveness of the method and emphasize its computational efficiency.

Item Type: Conference or Workshop Item (Paper)
Additional Information: © 2009 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Uncontrolled Keywords: CT colonography, pseudo-enhancement artifact, shift-variant filtering, shift-invariant filtering
Subjects: Q Science > QA Mathematics > QA75 Electronic computers. Computer science
R Medicine > RC Internal medicine
Divisions: School of Informatics > Department of Computing
URI: http://openaccess.city.ac.uk/id/eprint/4383

Actions (login required)

View Item View Item

Downloads

Downloads per month over past year

View more statistics