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Motion compensated digital subtraction angiography
Linköping University, Department of Electrical Engineering. Linköping University, The Institute of Technology. (SECTRA, Teknikringen 2, SE-583 30 Linköping, Sweden)
Linköping University, Department of Biomedical Engineering, Medical Informatics. Linköping University, The Institute of Technology.ORCID iD: 0000-0002-9091-4724
Linköping University, Department of Biomedical Engineering, Medical Informatics. Linköping University, The Institute of Technology.
SECTRA, Teknikringen 2, SE-583 30 Linköping, Sweden.
1999 (English)Conference paper (Refereed)
Abstract [en]

Digital subtraction angiography, whether based on traditional X-ray or MR, suers from patient motion artifacts. Until now, the usual remedy is to pixel shift by hand, or in some cases performing a global pixel shift semi-automatically. This is time consuming, and cannot handle rotations or local varying deformations over the image. We have developed a fully automatic algorithm that provides for motion compensation in the presence of large local deformations. Our motion compensation is very accurate for ordinary motions, including large rotations and deformations. It does not matter if the motions are irregular over time. For most images, it takes about a second per image to get adequate accuracy. The method is based on using the phase from lter banks of quadrature lters tuned in dierent directions and frequencies. Unlike traditional methods for optical ow and correlation, our method is more accurate and less susceptible to disturbing changes in the image, e.g. a moving contrast bolus. The implications for common practice are that radiologists' time can be significantly reduced in ordinary peripheral angiographies and that the number of retakes due to large or local motion artifacts will be much reduced.

Place, publisher, year, edition, pages
1999.
Keyword [en]
Motion Compensation, Motion Estimation, Digital Subtraction Angiography, Aperture Problem, Pixelshift, Automatic, Quadrature Filter, Regularization
National Category
Medical Laboratory and Measurements Technologies
Identifiers
URN: urn:nbn:se:liu:diva-67261OAI: oai:DiVA.org:liu-67261DiVA: diva2:408908
Conference
SPIE '99, San Diego, USA
Available from: 2011-04-12 Created: 2011-04-06 Last updated: 2013-08-28Bibliographically approved

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