Global ETD Search
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Showing 1 to 11 of 11 for “"Filtered backprojection"”.
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Time domain synthetic aperture radar image processing using fast factorised backprojection
Fast Factorised Backprojection(FFBP) is a Synthetic Aperture Radar (SAR) focusing technique which uses Filtered Backprojection(FBP) to produce high quality images in the spatial domain at speeds which rival spectral domain SAR focusing methods. Synthetic Aperture Radar (SAR) focusing is …
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Magnetic resonance microscopy
An n-dimensional (nD) filtered backprojection image reconstruction algorithm has been developed and used in the reconstruction of 4D spectral-spatial magnetic resonance imaging (MRI) data. The algorithm uses n-1 successive stages of 2D filtered backprojection to reconstruct an nD image. This …
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Applications of Multi-Pinhole Gamma Camera Collimation to Tomography and Image Enhancement
… were written to reconstruct the images by simple backprojection and by filtered backprojection.
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Fast Algorithms for Tomography
… size, with an accuracy comparable to the filtered backprojection (FBP) algorithm. Next, a fast reprojection algorithm is presented, which uses a hierarchical decomposition of the Radon transform. In conjunction with the fast backprojection algorithm, this novel algorithm enables the use of …
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Doppler-only synthetic aperture radar
… is necessary. This weighting is part of the Filtered Backprojection algorithm to determine the Inverse Radon transform of the sinogram. The backprojection portion is a simple redistribution of data back along the original projection line. Images were modeled by delta functions to test the …
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Statistical methods for mapping kinetics together with associated uncertainties in long field of view dynamic PET studies
… Numerical simulations using both direct Filtered Backprojection (FBP) and iterative Maximum Likelihood (ML) reconstructions are considered. Illustrative examples on conventional scanners and Long Axial Field-of-View (LAFOV) PET scanners are conducted. A short-duration dynamic scanning …
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Joint CT-MRI Image Reconstruction
… highly undersampled, analytical methods, such as filtered backprojection, are unable to generate images of sufficient quality. To overcome this drawback, we resort to compressed sensing techniques, which employ sparse priors that result from an application of L₁-norm minimization. To utilize …
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Development of Novel Cardiac CT Methods
… trajectory. The implementation of analytical filtered-backprojection reconstruction algorithms used involves multiplication with a uniform angular discretization term. This could lead to reduced image quality especially if fewer views are used. We used triangle based linear interpolation, …
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Improved statistical quantitation of dynamic PET scans
… numerical simulations. Both direct filtered backprojection (FBP) and iterative maximum likelihood (ML) reconstructions are considered. The proposed NPRM approach has some important features like the flexibility for diverse tissue environments and consideration of delays for different …
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TOMOGRAPHIC IMAGE RECONSTRUCTION: IMPLEMENTATION, OPTIMIZATION AND COMPARISON IN DIGITAL BREAST TOMOSYNTHESIS
… representative reconstruction methods such as Filtered backprojection method (FBP), Simultaneous algebraic reconstruction technique (SART) and Maximum likelihood (ML). We also compared our proposed statistical iterative reconstruction (IR) with particular prior and computational technique to …
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Development of correction algorithm for pulsed terahertz computed tomography (THz-CT)
For last couple of decades, there has been a considerable improvement in Terahertz (THz) science, technology, and imaging. In particular, the technique of 3-D computed tomography has been adapted to the THz range. However, it has been widely recognized that a fundamental limitation to THz computed …