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1 Machine Graphics and Vision

1 1998

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System for 3D localisation of malformations in the human brain

Ostergaard L. R., Lind J., Larsen O. V., Nielsen H., Bartholdy N. J., Haase J.

Machine Graphics and Vision

1998

Vol. 7, No. 1/2

159-167

A 3D localisation system for pre-operating planning is presented. The developed localisation system is able to estimate the 3D position of a target, e.g. an AVM (Arterio-Venous Malformation), based on a set of digital X-ray images. Distortion correction and camera calibrations is performed in order to obtain accurate 3D estimates. The system is tested on a plexiglass phantom with embedded steel pellets offering 126 test points with known 3D positions. The test has shown that the system is able to estimate 3D positions with a mean error of 0.33 mm and a maximum error of 1.18 mm. The required accuracy is 0.16 mm and the test showed that more than 90% of the 3D position estimates fulfilthis requirement.