Image intensifier distortion correction for fluoroscopic RSA: the need for independent accuracy assessment
Author(s)
Kedgley, Angela E
Fox, Anne-Marie V
Jenkyn, Thomas R
Type
Journal Article
Abstract
Fluoroscopic images suffer from multiple modes of image distortion. Therefore, the purpose of this study was to compare the effects of correction using a range of two‐dimensional polynomials and a global approach. The primary measure of interest was the average error in the distances between four beads of an accuracy phantom, as measured using RSA. Secondary measures of interest were the root mean squared errors of the fit of the chosen polynomial to the grid of beads used for correction, and the errors in the corrected distances between the points of the grid in a second position. Based upon the two‐dimensional measures, a polynomial of order three in the axis of correction and two in the perpendicular axis was preferred. However, based upon the RSA reconstruction, a polynomial of order three in the axis of correction and one in the perpendicular axis was preferred. The use of a calibration frame for these three‐dimensional applications most likely tempers the effects of distortion. This study suggests that distortion correction should be validated for each of its applications with an independent “gold standard” phantom.
Date Issued
2012-01-05
Date Acceptance
2011-09-07
Citation
JOURNAL OF APPLIED CLINICAL MEDICAL PHYSICS, 2012, 13 (1), pp.197-204
ISSN
1526-9914
Publisher
Wiley
Start Page
197
End Page
204
Journal / Book Title
JOURNAL OF APPLIED CLINICAL MEDICAL PHYSICS
Volume
13
Issue
1
Copyright Statement
© 2012 The Author(s). This article is open access under a Creative Commons license (https://creativecommons.org/licenses/by/3.0/)
Identifier
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000302465800017&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
Subjects
Science & Technology
Life Sciences & Biomedicine
Radiology, Nuclear Medicine & Medical Imaging
fluoroscopy
artifacts and distortion
reconstruction
RADIO STEREOMETRIC ANALYSIS
GEOMETRIC DISTORTION
GLOBAL METHOD
PRECISION
SYSTEM
CHAIN
MODEL
XRII
Publication Status
Published
Date Publish Online
2012-01-05