SC-GRAPPA: Self-constraint noniterative GRAPPA reconstruction with closed-form solution
نویسندگان
چکیده
منابع مشابه
Prior-regularized GRAPPA Reconstruction
F-H. Lin Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Charlestown, MA, United States Introduction An auto-calibration scan (ACS) can help to improve the reconstructions in k-space based parallel MRI, such as GRAPPA [1]. Usually ACS is acquired at the center of k-space for higher SNR, thus constituting of full-FOV low-resolution prior images in the channels of an RF co...
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Introduction: Recently, several non-Cartesian solutions for GRAPPA [1] reconstruction have been proposed [2-4]. These methods are either approximate, or tailored for specific sampling trajectories. Inspired by the generality of non-Cartesian SENSE [5], we propose a general accurate solution for GRAPPA reconstruction from arbitrary k-space sampling. The reconstruction is formulated as an optimiz...
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Introduction Parallel imaging has been widely used in MRI for scan time reduction and spatial resolution improvement. Concomitant with these advantages is the potential for higher noise and artifact levels. Various regularization techniques have been proposed to mitigate this problem. In this work, a new regularization method, namely adding noise to GRAPPA auto-calibration signal (ACS) data, an...
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The effectiveness of regularization to improve SNR in parallel imaging techniques has been reported in previous works [1-2], but how to optimize the regularization parameter remains a problem. The regularization parameter controls the degree of regularization and thereby determines the compromise between SNR and artifacts. Over-regularization causes high level of artifact, while under-regulariz...
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J. Miao, W. C. Wong, D. Huo, and D. L. Wilson Biomedical Engineering, Case Western Reserve University, Cleveland, Ohio, United States, Computer Science and Engineering, The Hong Kong University of Science and Technology, Kowloon, Hong Kong, Keller Center for Imaging Innovation, St. Joseph Hospital and Medical Center, Phoenix, Arizona, United States, Radiology, University Hospitals of Cleveland,...
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ژورنال
عنوان ژورنال: Medical Physics
سال: 2012
ISSN: 0094-2405
DOI: 10.1118/1.4768162