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Undersampled radial MRI with multiple coils. Iterative image reconstruction using a total variation constraint
TLDR
An iterative reconstruction method for undersampled radial MRI which is based on a nonlinear optimization, allows for the incorporation of prior knowledge with use of penalty functions, and deals with data from multiple coils is developed.
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Golden‐angle radial sparse parallel MRI: Combination of compressed sensing, parallel imaging, and golden‐angle radial sampling for fast and flexible dynamic volumetric MRI
To develop a fast and flexible free‐breathing dynamic volumetric MRI technique, iterative Golden‐angle RAdial Sparse Parallel MRI (iGRASP), that combines compressed sensing, parallel imaging, and…
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XD‐GRASP: Golden‐angle radial MRI with reconstruction of extra motion‐state dimensions using compressed sensing
To develop a novel framework for free‐breathing MRI called XD‐GRASP, which sorts dynamic data into extra motion‐state dimensions using the self‐navigation properties of radial imaging and…
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Image reconstruction by regularized nonlinear inversion—Joint estimation of coil sensitivities and image content
TLDR
A respective algorithm based on a Newton‐type method with appropriate regularization terms is demonstrated to improve the performance of autocalibrating parallel MRI—mainly due to a better estimation of the coil sensitivity profiles.
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Rapid and accurate T2 mapping from multi–spin‐echo data using Bloch‐simulation‐based reconstruction
TLDR
This work presents a novel postprocessing approach aiming to overcome the common penalties associated with multiecho protocols, and enabling rapid and accurate mapping of T2 relaxation values.
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Towards Routine Clinical Use of Radial Stack-of-Stars 3D Gradient-Echo Sequences for Reducing Motion Sensitivity
Almost all clinically established MR imaging techniques today use Cartesian acquisitions of k-space in which the Fourier space of the imaged body is sampled along parallel lines. Cartesian sampling…
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Self-gated MRI motion modeling for respiratory motion compensation in integrated PET/MRI
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Free-breathing dynamic contrast-enhanced MRI of the abdomen and chest using a radial gradient echo sequence with K-space weighted image contrast (KWIC)
TLDR
The free-breathing radial DCE-MRI can provide high spatial and temporal resolution while maintaining reasonably high image quality and thus is a feasible technique for DCE/KWIC MRI in the abdomen and thorax.
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Compressed sensing for body MRI
TLDR
An overview of the application of compressed sensing techniques in body MRI, where imaging speed is crucial due to the presence of respiratory motion along with stringent constraints on spatial and temporal resolution, is presented.
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Multiparametric imaging with heterogeneous radiofrequency fields
TLDR
The results show that it is possible to perform quantitative multiparametric imaging with heterogeneous RF fields, and to liberate MRI from the traditional struggle for control over the RF field uniformity.
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