Noise-weighted spatial domain FBP algorithm
نویسندگان
چکیده
منابع مشابه
Noise-weighted spatial domain FBP algorithm.
PURPOSE The purpose of this paper is to implement a noise-weighted filtered backprojection (FBP) algorithm in the form of "convolution" backprojection, but this "convolution" has a spatially variant integration kernel. METHODS Noise-weighted FBP algorithms have been developed in recent years, with filtering being performed in the Fourier domain. The noise weighting makes the ramp filter in th...
متن کاملExact Weighted-FBP Algorithm for Three-Orthogonal-Circular Scanning Reconstruction
Recently, 3D image fusion reconstruction using a FDK algorithm along three-orthogonal circular isocentric orbits has been proposed. On the other hand, we know that 3D image reconstruction based on three-orthogonal circular isocentric orbits is sufficient in the sense of Tuy data sufficiency condition. Therefore the datum obtained from three-orthogonal circular isocentric orbits can derive an ex...
متن کاملFBP: A Frontier-Based Tree-Pruning Algorithm
A frontier-based tree-pruning algorithm (FBP) is proposed. The new method has comparable order of computational complexity, comparing with Cost-Complexity Pruning (CCP). Regarding tree pruning, it provides a full spectrum of information; specifically, (1) given the value of the penalization parameter λ, it gives the minimum size of a decision tree; (2) given the size of a decision tree, it prov...
متن کاملParallel Implementation of Katsevich's FBP Algorithm
For spiral cone-beam CT, parallel computing is an effective approach to resolving the problem of heavy computation burden. It is well known that the major computation time is spent in the backprojection step for either filtered-backprojection (FBP) or backprojected-filtration (BPF) algorithms. By the cone-beam cover method [1], the backprojection procedure is driven by cone-beam projections, an...
متن کاملImproved Exact Fbp Algorithm for Spiral Ct
Proposed is a theoretically exact formula for inversion of data obtained by a spiral CT scan with a 2-D detector array. The detector array is supposed to be of limited extent in the axial direction. The main property of the formula is that it can be implemented in a truly filtered backprojection fashion. First, one performs shift-invariant filtering of a derivative of the cone beam projections,...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Medical Physics
سال: 2014
ISSN: 0094-2405
DOI: 10.1118/1.4870989