Quantitative evaluation of an algorithm for correcting geometrical distortions in DSA images: applications to stereotaxy

Laurent Launay; Catherine L. Picard; Eric Maurincomme; Rene Anxionnat; Pierre Bouchet; Luc Picard

doi:10.1117/12.208722

12 May 1995 Quantitative evaluation of an algorithm for correcting geometrical distortions in DSA images: applications to stereotaxy

Laurent Launay, Catherine L. Picard, Eric Maurincomme, Rene Anxionnat, Pierre Bouchet, Luc Picard

Author Affiliations +

Proceedings Volume 2434, Medical Imaging 1995: Image Processing; (1995) https://doi.org/10.1117/12.208722
Event: Medical Imaging 1995, 1995, San Diego, CA, United States

Abstract

In digital subtraction angiography, the use of an image intensifier as a detector introduces geometrical distortions in the images. For stereotactic applications, such as the irradiation of cerebral arteriovenous malformations, these distortions have necessarily to be corrected, and the accuracy of this correction has to be examined. As the distortions depend on many parameters that vary during an examination (such as magnetic field and spatial position of the acquisition chain), the correction accuracy must be defined as a function of the acquisition protocol. We have developed a correction method based on the calibration of geometrical distortions using an image of a grid phantom. An experimental study of the influence of acquisition parameters over the distortion has been performed. A protocol has been defined which ensures a correction accuracy of 0.1 millimeter. Finally, we have studied the accuracy obtained in the 3D location of a target as a function of the accuracy of the distortion correction. The final precision allows the use of our method for digital x-ray stereotactic applications.

Citation Download Citation

Laurent Launay, Catherine L. Picard, Eric Maurincomme, Rene Anxionnat, Pierre Bouchet, and Luc Picard "Quantitative evaluation of an algorithm for correcting geometrical distortions in DSA images: applications to stereotaxy", Proc. SPIE 2434, Medical Imaging 1995: Image Processing, (12 May 1995); https://doi.org/10.1117/12.208722

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available