منابع مشابه
k-space undersampling in PROPELLER imaging.
PROPELLER MRI (periodically rotated overlapping parallel lines with enhanced reconstruction) provides images with significantly fewer B(0)-related artifacts than echo-planar imaging (EPI), as well as reduced sensitivity to motion compared to conventional multiple-shot fast spin-echo (FSE). However, the minimum imaging time in PROPELLER is markedly longer than in EPI and 50% longer than in conve...
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M. Blaimer, K. Barkauskas, S. Kannengiesser, F. Breuer, P. M. Jakob, J. L. Duerk, M. A. Griswold Department of Radiology, University Hospitals of Cleveland and Case Western Reserve University, Cleveland, OH, United States, Siemens Medical Solutions, Erlangen, Germany, Department of Experimental Physics 5, University of Wuerzburg, Wuerzburg, Germany Introduction: BLADE (a.k.a., PROPELLER) MRI me...
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Magnetic Resonance Imaging (MRI) is a noninvasive imaging method widely used in medical diagnosis. Data in MRI are obtained line-by-line within the K-space, where there are usually a great number of such lines. For this reason, magnetic resonance imaging is slow. MRI can be accelerated through several methods such as parallel imaging and compressed sensing, where a fraction of the K-space lines...
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We study anisotropic undersampling schemes like those used in multi-dimensional NMR spectroscopy and MR imaging, which sample exhaustively in certain time dimensions and randomly in others. Our analysis shows that anisotropic undersampling schemes are equivalent to certain block-diagonal measurement systems. We develop novel exact formulas for the sparsity/undersampling tradeoffs in such measur...
متن کاملK-space undersampling strategies for functional and cardiac MRI: achieving rapid acquisition while maintaining image quality
Northeastern University Department of Electrical and Computer Engineering Doctor of Philosophy in Electrical Engineering K-space undersampling strategies for functional and cardiac MRI: Achieving rapid acquisition while maintaining image quality by Onur Afacan Scan time is the limiting factor in many magnetic resonance imaging applications. One approach to reduce the scan time is undersampling ...
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ژورنال
عنوان ژورنال: Magnetic Resonance in Medicine
سال: 2005
ISSN: 0740-3194,1522-2594
DOI: 10.1002/mrm.20380