Exact gram filtering and efficient back projection for iterative CT reconstruction.
Sign Up to like & getrecommendations! Published in 2022 at "Medical physics"
DOI: 10.1002/mp.15547
Abstract: PURPOSE Forward and back-projections are the basis of all model-based iterative reconstruction (MBIR) methods. However, computing these accurately is time consuming. In this paper, we present a method for model-based iterative reconstruction in parallel X-ray… read more here.
Keywords: iterative reconstruction; projection; methodology; back projection ... See more keywords
Saturation rates of filtered back projection approximations
Sign Up to like & getrecommendations! Published in 2020 at "Calcolo"
DOI: 10.1007/s10092-020-00360-y
Abstract: This paper concerns the approximation of bivariate functions by using the well-known filtered back projection (FBP) formula from computerized tomography. We prove error estimates and convergence rates for the FBP approximation of target functions from… read more here.
Keywords: saturation rates; back projection; filtered back; rates filtered ... See more keywords
Comparison of low-dose coronary artery calcium scoring using low tube current technique and hybrid iterative reconstruction vs. filtered back projection.
Sign Up to like & getrecommendations! Published in 2017 at "Clinical imaging"
DOI: 10.1016/j.clinimag.2017.01.017
Abstract: INTRODUCTION We sought to validate whether low dose CACS CT with hybrid IR (HIR) could replace standard dose filtered back projection (FBP). METHOD We enrolled 100 patients to undergo low dose CACS CT with HIR,… read more here.
Keywords: low dose; calcium scoring; back projection; filtered back ... See more keywords
Full-frequency correction of spatial impulse response in back-projection scheme using space-variant filtering for optoacoustic mesoscopy
Sign Up to like & getrecommendations! Published in 2020 at "Photoacoustics"
DOI: 10.1016/j.pacs.2020.100193
Abstract: The fidelity and quality of reconstructed images in optoacoustic mesoscopy (OPAM) can be significantly improved by considering the spatial impulse response (SIR) of the employed focused transducer into reconstruction. However, the traditional method fully taking… read more here.
Keywords: impulse response; spatial impulse; back projection; projection ... See more keywords
A Multi‐Array Back‐Projection Approach for Tsunami Warning
Sign Up to like & getrecommendations! Published in 2020 at "Geophysical Research Letters"
DOI: 10.1029/2019gl085763
Abstract: Recent development of dense strong‐motion networks and seismic array processing enables rapid tsunami predictions based on the back‐projection (BP) approach. We develop a multi‐array local BP method (MLBP) using seismic networks with epicentral distance from… read more here.
Keywords: array; tsunami; multi array; back projection ... See more keywords
Strategies for rapid reconstruction in 3D MRI with radial data acquisition: 3D fast Fourier transform vs two-step 2D filtered back-projection
Sign Up to like & getrecommendations! Published in 2020 at "Scientific Reports"
DOI: 10.1038/s41598-020-70698-4
Abstract: For 3D radial data reconstruction in magnetic resonance imaging (MRI), fast Fourier transform via gridding (gFFT) is widely used for its fast processing and flexibility. In comparison, conventional 3D filtered back projection (cFBP), while more… read more here.
Keywords: reconstruction; radial data; filtered back; back projection ... See more keywords
Comparison of forward- and back-projection in vivo EPID dosimetry for VMAT treatment of the prostate.
Sign Up to like & getrecommendations! Published in 2018 at "Physics in medicine and biology"
DOI: 10.1088/1361-6560/aa9c60
Abstract: In the forward-projection method of portal dosimetry for volumetric modulated arc therapy (VMAT), the integrated signal at the electronic portal imaging device (EPID) is predicted at the time of treatment planning, against which the measured… read more here.
Keywords: forward back; treatment; epid dosimetry; back projection ... See more keywords
Optimizing 4D abdominal MRI: image denoising using an iterative back-projection approach.
Sign Up to like & getrecommendations! Published in 2019 at "Physics in medicine and biology"
DOI: 10.1088/1361-6560/ab563e
Abstract: 4D-MRI is a promising tool for organ exploration, target delineation and treatment planning. Intra-scan motion artifacts may be greatly reduced using a high imaging frame rate. However, poor signal-to-noise ratios (SNR) are observed when increasing… read more here.
Keywords: image; iterative back; back projection; using iterative ... See more keywords
The ‘ramp filter’ artifact in filtered back projection is due to attenuation not ramp filtering
Sign Up to like & getrecommendations! Published in 2022 at "Nuclear Medicine Communications"
DOI: 10.1097/mnm.0000000000001548
Abstract: Background Artifactually decreased counts in regions of the left ventricle adjacent to intense splanchnic activity have been described in single photon emission computed tomography imaging and attributed to the side lobes of ramp filtering, a… read more here.
Keywords: attenuation; ramp; back projection; filtered back ... See more keywords
Convolutional Neural Network (CNN)-Based Fast Back Projection Imaging With Noise-Resistant Capability
Sign Up to like & getrecommendations! Published in 2020 at "IEEE Access"
DOI: 10.1109/access.2020.3004860
Abstract: We propose and demonstrate a convolutional neural network (CNN)-based fast back projection (FBP) imaging method, which has noise-resistant capability in strong noise conditions. In this method, the desired high-resolution image is constructed from a low-resolution… read more here.
Keywords: back projection; cnn based; fbp imaging; noise ... See more keywords
Fixed-Point Processing of the SAR Back-Projection Algorithm on FPGA
Sign Up to like & getrecommendations! Published in 2021 at "IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing"
DOI: 10.1109/jstars.2021.3119007
Abstract: Time-domain back-projection (BP) is a widely known method used in synthetic aperture radar (SAR) image formation. Despite its advantages over other image formation algorithms, the BP method is hindered due to its computational complexity and… read more here.
Keywords: back projection; point; performance; sar ... See more keywords