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- W2011020848 abstract "This paper combines different parallelization strategies for speeding up motion and deformation computation bynon-rigid registration of a sequence of images. The registration is performed in a two-level acceleration approach:(1) parallelization of each registration process using MPI and/or threads, and (2) distribution of the sequentialregistrations over a cluster.On a 24-node double quad-core Intel Xeon (2.66 GHz CPU, 16 GB RAM) cluster, the method is demonstratedto efficiently compute the deformation of a cardiac sequence reducing the computation time from more than 3hours to a couple of minutes (for low downsampled images). It is shown that the distribution of the sequentialregistrations over the cluster together with the parallelization of each pairwise registration by multithreadinglowers the computation time towards values compatible with clinical requirements (a few minutes per patient).The combination of MPI and multithreading is only advantageous for large input data sizes.Performances are assessed for the specific scenario of aligning cardiac sequences of taggedMagnetic Resonance(tMR) images, with the aim of comparing strain in healthy subjects and hypertrophic cardiomyopathy (HCM)patients. In particular, we compared the distribution of systolic strain in both populations. On average, HCMpatients showed lower average values of strain with larger deviation due to the coexistence of regions withimpaired deformation and regions with normal deformation." @default.
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- W2011020848 date "2009-02-26" @default.
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- W2011020848 title "Myocardial deformation from tagged MRI in hypertrophic cardiomyopathy using an efficient registration strategy" @default.
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- W2011020848 doi "https://doi.org/10.1117/12.812885" @default.
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