Results 51 to 60 of about 68,766 (311)

Inexact Bregman iteration with an application to Poisson data reconstruction

, 2013
This work deals with the solution of image restoration problems by an iterative regularization method based on the Bregman iteration. Any iteration of this scheme requires to exactly compute the minimizer of a function.
Ruggiero, V, Ruggiero, Valeria, Benfenati, A, Benfenati, Alessandro   +3 more
core   +1 more source

Model-Based Iterative Reconstruction (MBIR) for ASPECT Scoring in Acute Stroke Patients Selection: Comparison to rCBV and Follow-Up Imaging

Tomography, 2022
Background: To compare a model-based iterative reconstruction (MBIR) versus a hybrid iterative reconstruction (HIR) for initial and final Alberta Stroke Program Early Ct Score (ASPECT) scoring in acute ischemic stroke (AIS).
Brieg Dissaux, Mourad Cheddad El Aouni, Julien Ognard, Jean-Christophe Gentric   +3 more
doaj   +1 more source

An iterative reconstruction algorithm for Faraday tomography [PDF]

Monthly Notices of the Royal Astronomical Society, 2020
ABSTRACT Faraday tomography offers crucial information on the magnetized astronomical objects, such as quasars, galaxies, or galaxy clusters, by observing its magnetoionic media. The observed linear polarization spectrum is inverse Fourier transformed to obtain the Faraday dispersion function (FDF), providing us a tomographic ...
Suchetha Cooray, Tsutomu T Takeuchi, Takuya Akahori, Yoshimitsu Miyashita, Shinsuke Ideguchi, Keitaro Takahashi, Kiyotomo Ichiki   +6 more
openaire   +3 more sources

A fast Bayesian reconstruction algorithm for emission tomography with entropy prior converging to feasible images

, 1990
The development and tests of an iterative reconstruction algorithm for emission tomography based on Bayesian statistical concepts are described. The algorithm uses the entropy of the generated image as a prior distribution, can be accelerated by the ...
Núñez de Murga, Jorge, 1955-, Llacer, Jorge   +1 more
core   +1 more source

Projector Model for Efficient List-Mode Reconstruction in PET Scanners with Parallel Planar Detectors

, 2011
We have developed a new projector model specifically tailored for fast list-mode tomographic reconstructions in Positron emission tomography (PET) scanners with parallel planar detectors.
Sportelli, Giancarlo, Guerra Gutiérrez, Pedro, Andres Santos, Santos Lleo, Andres de, Pedro Guerra, Guerra, P, Juan E. Ortuno, Giancarlo Sportelli, Ortuño Fisac, Juan Enrique, Santos, A., Ortuno, JE   +10 more
core   +1 more source

PET reconstruction artifact can be minimized by using sinogram correction and filtered back-projection technique

Indian Journal of Radiology and Imaging, 2014
Filtered Back-Projection (FBP) has become an outdated image reconstruction technique in new-generation positron emission tomography (PET)/computed tomography (CT) scanners.
Ashish Kumar Jha, Nilendu C Purandare, Sneha Shah, Archi Agrawal, Ameya D Puranik, Venkatesh Rangarajan   +5 more
doaj   +1 more source

Epigenetic heterogeneity and plasticity in therapy‐induced tumor states through single‐cell multi‐omics

Molecular Oncology, EarlyView.
Single‐cell multi‐omics reveals epigenetic heterogeneity across therapy‐adaptive tumor states, including quiescent/dormant, drug‐tolerant persister, and EMT‐like phenotypes. By linking regulatory features with state‐associated biomarkers, these approaches inform biomarker‐guided therapeutic strategies for evolving tumors.
Hee Jung Kim, Hwiyeong Lee, Jin Hong, Daechan Park   +3 more
wiley   +1 more source

Effect of iterative reconstruction techniques on image quality in low radiation dose chest CT: a phantom study [PDF]

, 2019
PURPOSEWe aimed to evaluate the quality of chest computed tomography (CT) images obtained with low-dose CT using three iterative reconstruction (IR) algorithms.METHODSTwo 64-detector spiral CT scanners (HDCT and iCT) were used to scan a chest phantom ...
Hong-jun Hou, Zu-shan Xu, Ting-ting Zhang, Juan Li, Wen He, Zhi-hai Hu, Yan Xu   +6 more
core   +1 more source

Bandlimited Frequency-Constrained Iterative Methods

Remote Sensing
Variable aperture sampling reconstruction matrices have a history of being computationally intensive due to the need to compute a full matrix inverse. In the field of remote sensing, several spaceborne radiometers and scatterometers, which have irregular
Harrison Garrett, David G. Long
doaj   +1 more source

Iterative reconstruction of the transducer surface velocity [PDF]

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 2013
Ultrasound arrays used for medical imaging consist of many elements placed closely together. Ideally, each element vibrates independently. However, because of mechanical coupling, crosstalk between neighboring elements may occur. To quantify the amount of crosstalk, the transducer velocity distribution should be measured.
Erwin, Alles, Koen, van Dongen
openaire   +2 more sources