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Conference papers
Registration of free-breathing abdominal 3D contrast-enhanced CT
Abstract : CT perfusion imaging is used for the follow-up of abdominal tumors. A speci city of our work is that patients are breathing freely during image acquisition (5 minutes). We propose an automatic 3D image registration to compensate respiratory motion. The registration is computed in two main steps: global translation in the z-direction and 3D multiresolution blockmatching. Within this algorithm, the choice of similarity measure largely determines the algorithm robustness in presence of intensity shifts due to contrast di usion. We exploit a modi ed entropy-based similarity measure to improve the quality of registration. We also propose two relevant criteria allowing to quantify the registration quality: one based on the gradients of image volumes of di erences and one based on the smoothness of enhanced-intensity curves. Copyright Springer-Verlag Berlin Heidelberg. The original publication can be found at http://link.springer.com/chapter/10.1007/978-3-642-33612-6_29
Cited literature [7 references]
https://hal.archives-ouvertes.fr/hal-00780707
Contributor : Cybèle Ciofolo-Veit Connect in order to contact the contributor
Submitted on : Friday, January 24, 2014 - 7:00:05 AM
Last modification on : Tuesday, July 20, 2021 - 3:05:15 AM
Long-term archiving on: : Thursday, April 24, 2014 - 10:05:22 PM
Contributor : Cybèle Ciofolo-Veit Connect in order to contact the contributor
Submitted on : Friday, January 24, 2014 - 7:00:05 AM
Last modification on : Tuesday, July 20, 2021 - 3:05:15 AM
Long-term archiving on: : Thursday, April 24, 2014 - 10:05:22 PM
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