GEOMETRICAL CALIBRATION OF X-RAY-IMAGING CHAINS FOR 3-DIMENSIONAL RECONSTRUCTION

被引：84

作者：

ROUGEE, A

PICARD, C

PONCHUT, C

TROUSSET, Y

机构：

[1] General Electric Medical Systems Europe, 78 533 BUC Cedex

来源：

COMPUTERIZED MEDICAL IMAGING AND GRAPHICS | 1993年 / 17卷 / 4-5期

关键词：

GEOMETRICAL CALIBRATION; X-RAY IMAGING; CONIC PROJECTION; 3-DIMENSIONAL RECONSTRUCTION;

D O I：

10.1016/0895-6111(93)90020-N

中图分类号：

R318 [生物医学工程];

学科分类号：

0831 ;

摘要：

Reconstructing a three-dimensional (3D) object from a set of its two-dimensional (2D) X-ray projections requires that the source position and image plane orientation in 3D space be obtained with high accuracy. We present a method for estimating the geometrical parameters of an X-ray imaging chain, based on the minimization of the reprojection mean quadratic error measured on reference points of a calibration phantom. This error is explicitly calculated with respect to the geometrical parameters of the conic projection, and a conjugate gradient technique is used for its minimization. By comparison to the classical unconstrained method, better results were obtained in simulation with our method, specially when only a few reference points are available. This method may be adapted to different X-ray systems and may also be extended to the estimation of the geometrical parameters of the imaging chain trajectory in the case of dynamic acquisitions.

引用

页码：295 / 300

页数：6

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