MICCAI '01 Proceedings of the 4th International Conference on Medical Image Computing and Computer-Assisted Intervention
Construction of a cardiac motion atlas from MR using non-rigid registration
FIMH'03 Proceedings of the 2nd international conference on Functional imaging and modeling of the heart
Spatio-temporal alignment of 4D cardiac MR images
FIMH'03 Proceedings of the 2nd international conference on Functional imaging and modeling of the heart
Construction of a 4D statistical atlas of the cardiac anatomy and its use in classification
MICCAI'05 Proceedings of the 8th international conference on Medical image computing and computer-assisted intervention - Volume Part II
Towards a comprehensive geometric model of the heart
FIMH'05 Proceedings of the Third international conference on Functional Imaging and Modeling of the Heart
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We present a novel technique that enables a direct quantitative comparison of cardiac motion derived from 4D MR image sequences to be made either within or across patients. This is achieved by registering the images that describe the anatomy of both subjects and then using the computed transformation to map the motion fields of each subject into the same coordinate system. The motion fields are calculated by registering each of the frames in a sequence of tagged short-axis MRI images to the end-diastolic frame using a non-rigid registration technique based on multi-level free-form deformations. The end-diastolic untagged short-axis images acquired shortly after the tagged images were obtained are registered using non-rigid registration to determine an inter-subject mapping, which is used to transform the motion fields of one of the subjects into the coordinate system of the other, which is thus our reference coordinate system. The results show the transformed myocardial motion fields of a series of volunteers, and clearly demonstrate the potential of the proposed technique.