Dynamic MRI
Temporal resolution enhancement of dynamic MRI sequences within a motion-based framework
... anatomical dynamic MRI ...real-time dynamic MR imaging algo- rithms which are generally based on compressed sensing theory [11], for which it is hard to fastly acquire the entire or nearly the entire ...
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Coupling texture analysis and physiological modeling for liver dynamic MRI interpretation.
... In MRI for instance, the sequence (Spin-Echo, Gradient Echo, etc) and its parameters (Repetition Time, Echo Time, slice thickness, etc) have a great influence on the contrast between normal and tumoral tissues, ...
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Motion Compensated Dynamic MRI Reconstruction with Local Affine Optical Flow Estimation
... cine MRI sequences were acquired using a Philips Intera ...cine MRI sequences, the prior for this dataset is the combination of sparsity and TV prior (denoted as “ℓ 1 +tv”) in the proposed algorithms for ...
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Using Silence MR Image to Synthesise Dynamic MRI Vocal Tract Data of CV
... As discussed earlier, rtMRI acquisition of vocal tract data is a long process in terms of finding appropriate and available equipment, designing a recording protocol, selecting subjects, recording data and annotating the ...
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Motion Compensated Dynamic MRI Reconstruction with Local Affine Optical Flow Estimation
... Due to the presence of motion patterns in DMRI acquisi- tion, combining the motion estimation/motion compenstaion (ME/MC) with the DMRI reconstruction has been explored in the literature, see e.g., [9]–[18]. For ...
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Compressed Sensing in MRI : optimization-based design of k-space filling curves for accelerated MRI
... for MRI but forces to resort to 3D ...for dynamic MRI using a Poisson disk distribution with a fully-sampled central re- gion of the k-space as is shown in ...3D MRI (Chapter ...
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Spatio-temporal wavelet regularization for parallel MRI reconstruction: application to functional MRI
... • Account for 3D spatial dependencies between adjacent slices by using 3D WTs, • Exploit the temporal dependency between acquired 3D volumes by applying an additional regularization term along the temporal dimension of ...
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Spatio-temporal wavelet regularization for parallel MRI reconstruction: application to functional MRI
... step may impact subsequent statistical analysis. This has motivated the extension of the wavelet regularized reconstruction approach in [37] in order to: – account for 3D spatial dependencies between adjacent slices by ...
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Measurement of Tongue Tip Velocity from Real-Time MRI and Phase-Contrast Cine-MRI in Consonant Production
... Since MRI acquisition in a mid-sagittal plane does not provide a direct velocity measure and involves calculating the difference of the tongue position between two adjacent frames, it can be supplemented with ...
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Bone abnormalities of the knee: MRI features
... Spontaneous osteonecrosis Spontaneous osteonecrosis is due to repeated stress microfractures that cause ischemia. It is most often observed in elderly subjects within the weight-bearing area of the medial femoral ...
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Planning for Bone Excision in Ewing Sarcoma: Post-Chemotherapy MRI More Accurate Than Pre-Chemotherapy MRI Assessment
... Improving the accuracy of the assessment of tumor limits can permit reduction of safety margins. The objective is to expand the possibilities for epiphyseal conservation, for better durability of function of the ...
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A simulation tool for dynamic contrast enhanced MRI.
... As the expense of computational time, these two restrictions can be overcome by extending our approach to a 3D voxel. In that case, vessels are usually modeled by straight cylinders. One could also used 3D microvascular ...
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MRI atlas of the human hypothalamus.
... the MRI sequences realized in the coronal plane in twenty healthy ...volunteers. MRI was performed on a ...different MRI sequences were analyzed in comparison to each ...that MRI could also ...
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Challenges for molecular neuroimaging with MRI
... by MRI contrast agents may be difficult to detect either because they are small compared with scanner-related noise levels, or because of relatively high background from endogenous MRI signals, including ...
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Semantic description of brain MRI images
... 1 Introduction Identifying the anatomical structures in brain Magnetic Resonance Images (MRI) is an important aspect of the preparation of a surgical intervention in neuro- surgery, especially when the lesion is ...
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Modeling dynamic reliability using dynamic Bayesian networks
... Laboratoire Génie de Production, Ecole Nationale d’Ingénieurs de Tarbes 47, Avenue d'Azereix - BP 1629, 65016 - Tarbes Cedex - France. Ayeley.Tchangani@enit.fr , Daniel.Noyes@enit.fr Abstract: This paper considers the ...
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Quantifying perinatal brain maturation using anatomical MRI
... brain MRI acquisition and processing open the way to quantitative analyses not achievable so ...anatomical MRI to characterize typical and abnormal maturation trajectories in the perinatal ...
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MRI using radiofrequency magnetic field phase gradients
... by playing out echo train pulse sequences with each RF refocusing pulse generated using one from a small set of phase gradient RF transmit fields. Rotating Frame Imaging In the very early days of MRI, an ...
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Multimodal MRI segmentation of ischemic stroke lesions
... F.Forbes is with INRIA-Laboratory, Jean Kuntzman, Grenoble University (e-mail: Florence.Forbes@inrialpes.fr) traditional way for assessing stroke lesions is based on a manual segmentation. It consists of a manual ...
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The role of diffusion MRI in neuroscience
... Decades later, magnetic resonance imaging (MRI) brought a new window on human brain anatomy. In 1985, a breakthrough came with the emergence diffusion-weighted MRI (DWI, 18 ). DWI measures the diffusion of ...
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