Automatic detection of fiducial markers in fluoroscopy images for on-line calibration

被引:6
|
作者
Smith, L [1 ]
Pleasance, M [1 ]
Seeton, R [1 ]
Archip, N [1 ]
Rohling, R [1 ]
机构
[1] Univ British Columbia, Vancouver, BC V5Z 1M9, Canada
关键词
fiducial markers; C-arm fluoroscopy; calibration;
D O I
10.1118/1.1914547
中图分类号
R8 [特种医学]; R445 [影像诊断学];
学科分类号
1002 ; 100207 ; 1009 ;
摘要
Calibrated C-arm fluoroscopy is used for a variety of medical procedures where objects and anatomical structures need to be located in space. Calibration is often based on imaging a grid of fiducial markers and using the C-arm image's geometrical measurements (radius and center) together with the positions of the markers. An on-line technique is developed to automatically locate the fiducial markers and validated on 97 images. The success rate of the detection algorithm is 96.28% with an average error of 0.46 mm and a standard deviation of 0.32 mm. (c) 2005 American Association of Physicists in Medicine.
引用
收藏
页码:1521 / 1523
页数:3
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