منابع مشابه
Estimating Absolute-Phase Maps Using ESPIRiT and Virtual Conjugate Coils
PURPOSE To develop an ESPIRiT-based method to estimate coil sensitivities with image phase as a building block for efficient and robust image reconstruction with phase constraints. THEORY AND METHODS ESPIRiT is a new framework for calibration of the coil sensitivities and reconstruction in parallel magnetic resonance imaging. Applying ESPIRiT to a combined set of physical and virtual conjugat...
متن کاملComparison of dynamical degrees for semi - conjugate meromorphic maps
Let f : X → X be a dominant meromorphic map on a projective manifold X which preserves a meromorphic fibration π : X → Y of X over a projective manifold Y. We establish formulas relating the dynamical degrees of f , the dynamical degrees of f relative to the fibration and the dynamical degrees of the map g : Y → Y induced by f. Applications are given.
متن کاملG-factor Maps of Conjugate Gradient SENSE Reconstruction
we propose a method to calculate the generalized spatially varying g-factor map for conjugate gradient (CG) SENSE reconstruction with arbitrary trajectories. The method allows us to analyze how different trajectories and number of iterations in CG affect the SNR in a spatially dependent way. THEORY: For Cartesian SENSE, the image is reconstructed by solving H -1 -1 H -1 v = (S Ψ S) S Ψ a [1] pi...
متن کامل2D Spatial Distributions for Measures of Random Sequences Using Conjugate Maps
Advanced visual tools are useful to provide additional information for modern information warfare. 2D spatial distributions of random sequences play an important role to understand properties of complex sequences. This paper proposes time-sequences from a given logical function of 1D Cellular Automata in both Poincare map and conjugate map. Multiple measure sequences of Markov chains can be use...
متن کاملStability of F-biharmonic maps
This paper studies some properties of F-biharmonic maps between Riemannian manifolds. By considering the first variation formula of the F-bienergy functional, F-biharmonicity of conformal maps are investigated. Moreover, the second variation formula for F-biharmonic maps is obtained. As an application, instability and nonexistence theorems for F-biharmonic maps are given.
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ژورنال
عنوان ژورنال: Scholarpedia
سال: 2007
ISSN: 1941-6016
DOI: 10.4249/scholarpedia.5420