Search results for "Feldkamp"

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QR-Factorization Algorithm for Computed Tomography (CT): Comparison With FDK and Conjugate Gradient (CG) Algorithms

2018

[EN] Even though QR-factorization of the system matrix for tomographic devices has been already used for medical imaging, to date, no satisfactory solution has been found for solving large linear systems, such as those used in computed tomography (CT) (in the order of 106 equations). In CT, the Feldkamp, Davis, and Kress back projection algorithm (FDK) and iterative methods like conjugate gradient (CG) are the standard methods used for image reconstruction. As the image reconstruction problem can be modeled by a large linear system of equations, QR-factorization of the system matrix could be used to solve this system. Current advances in computer science enable the use of direct methods for…

QR-factorization algorithmComputer scienceIterative methodImage qualityLinear systemDavis and Kress (FDK)Iterative reconstruction3-D images reconstructionSystem of linear equationsAtomic and Molecular Physics and OpticsConjugate gradient (CG)FeldkampQR decompositionMatrix (mathematics)Conjugate gradient methodRadiology Nuclear Medicine and imagingMedical imagingMATEMATICA APLICADAInstrumentationAlgorithmComputed tomography (CT)Reconstruction algorithmsReconstruction toolkit (RTK)
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