k-t BLAST reconstruction from non-Cartesiank-t space sampling
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چکیده
منابع مشابه
k-t BLAST reconstruction from non-Cartesian k-t space sampling.
Current implementations of k-t Broad-use Linear Acqusition Speed-up Technique (BLAST) require the sampling in k-t space to conform to a lattice. To permit the use of k-t BLAST with non-Cartesian sampling, an iterative reconstruction approach is proposed in this work. This method, which is based on the conjugate gradient (CG) method and gridding reconstruction principles, can efficiently handle ...
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M. S. Hansen, J. Tsao, S. Kozerke, H. Eggers MR-Centre, Skejby Hospital, Aarhus University Hospital, Aarhus N, Denmark, Novartis Institutes for BioMedical Research, Cambridge, Massachusetts, United States, Institute for Biomedical Engineering, Swiss Federal Institute of Technology (ETH), Zurich, Switzerland, Philips Research Laboratories, Hamburg, Germany INTRODUCTION The k-t BLAST method (1) d...
متن کاملImproving Temporal Fidelity in k-t BLAST MRI Reconstruction
Studies of myocardial motion using magnetic resonance imaging usually require multiple breath holds and several methods have been proposed in order to reduce the scan time. Rapid imaging using k-t BLAST has gained much attention with its high reduction factors and image quality. Temporal smoothing, however, may reduce the accuracy when assessing cardiac function. In the present work, a modified...
متن کاملImproved k-t BLAST and k-t SENSE using FOCUSS.
The dynamic MR imaging of time-varying objects, such as beating hearts or brain hemodynamics, requires a significant reduction of the data acquisition time without sacrificing spatial resolution. The classical approaches for this goal include parallel imaging, temporal filtering and their combinations. Recently, model-based reconstruction methods called k-t BLAST and k-t SENSE have been propose...
متن کاملk-t BLAST and k-t SENSE: dynamic MRI with high frame rate exploiting spatiotemporal correlations.
Dynamic images of natural objects exhibit significant correlations in k-space and time. Thus, it is feasible to acquire only a reduced amount of data and recover the missing portion afterwards. This leads to an improved temporal resolution, or an improved spatial resolution for a given amount of acquisition. Based on this approach, two methods were developed to significantly improve the perform...
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ژورنال
عنوان ژورنال: Magnetic Resonance in Medicine
سال: 2005
ISSN: 0740-3194,1522-2594
DOI: 10.1002/mrm.20734