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19 March 2014 A combined local and global motion estimation and compensation method for cardiac CT
Qiulin Tang; Beshan Chiang; Akinola Akinyemi; Alexander Zamyatin; Bibo Shi; Satoru Nakanishi
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Proceedings Volume 9033, Medical Imaging 2014: Physics of Medical Imaging; 903304 (2014) https://doi.org/10.1117/12.2043492
Event: SPIE Medical Imaging, 2014, San Diego, California, United States
Abstract
A new motion estimation and compensation method for cardiac computed tomography (CT) was developed. By combining two motion estimation (ME) approaches the proposed method estimates the local and global cardiac motion and then preforms motion compensated reconstruction. The combined motion estimation method has two parts: one is the local motion estimation, which estimates the coronary artery motion by using coronary artery tree tracking and registration; the other one is the global motion estimation, which estimates the entire cardiac motion estimation by image registration. The final cardiac motion is the linear combination of the coronary artery motion and entire cardiac motion the. We use the backproject-then-warp method proposed by Pack et al. to perform motion compensation reconstruction (MCR). The proposed method was evaluated with 5 patient data and improvements in sharpness of both coronary arteries and heart chamber boundaries were obtained.
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Qiulin Tang, Beshan Chiang, Akinola Akinyemi, Alexander Zamyatin, Bibo Shi, and Satoru Nakanishi "A combined local and global motion estimation and compensation method for cardiac CT", Proc. SPIE 9033, Medical Imaging 2014: Physics of Medical Imaging, 903304 (19 March 2014); https://doi.org/10.1117/12.2043492
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