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Spatiotemporal Decomposition in Object-Space along Reconstruction in Emission Tomography
[chapter]
2008
Lecture Notes in Computer Science
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Emission tomography has provided a new insight in brain mechanisms past years. Although reconstructions are nowadays mostly static, trend is going toward dynamic acquisitions and reconstructions. ...
Results are very promising, since it estimates arterial input function accurately although object emits just a limited amount of photons, especially within the first minutes. ...
It deeply reduces the number of variables and explicitly encodes the temporal correlation in the reconstruction. ...
doi:10.1007/978-3-540-85990-1_31
fatcat:6mms7ultprd6hbtvexdwg3bs3u
Hybrid Projection Methods for Solution Decomposition in Large-scale Bayesian Inverse Problems
[article]
2022
arXiv
pre-print
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Such scenarios arise in many imaging applications (e.g., anomaly detection in atmospheric emissions tomography) where the reconstructed solution can be represented as a combination of two or more components ...
In a deterministic inversion or inverse modeling framework, these assumptions correspond to different regularization terms for each solution in the sum. ...
In the top row, we provide the averaged computed reconstruction for sdHybr, along with the average reconstructions for s 1 and s 2 . ...
arXiv:2206.06664v1
fatcat:brlhyndccvafvj4udj4lmjcoza
Super-resolution three-dimensional fluorescence and optical diffraction tomography of live cells using structured illumination generated by a digital micromirror device
[article]
2018
arXiv
pre-print
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the HeLa cell is analyzed using spatiotemporal correlations. ...
We present a multimodal approach for measuring the three-dimensional (3D) refractive index (RI) and fluorescence distributions of live cells by combining optical diffraction tomography (ODT) and 3D structured ...
All the authors have financial interests in Tomocube Inc., a company that commercializes ODT and QPI instruments and is one of the sponsors of the work. ...
arXiv:1801.00854v1
fatcat:byua2al3wzawdkjy7oloubn4bi
Imaging of turbulent structures and tomographic reconstruction of TORPEX plasma emissivity
2010
Physics of Plasmas
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The -time and the two-dimensional k-space Fourier analysis of the reconstructed emissivity fluctuations show the same interchange mode that is detected in the and k spectra of the ion saturation current ...
of equations by singular value decomposition. ...
THEORETICAL BACKGROUND OF PLASMA TOMOGRAPHY Provided that the plasma is fully transparent to its radiation, the plasma light emission is integrated along lines of sight ͑LOSs͒ passing through different ...
doi:10.1063/1.3523052
fatcat:enk5zihadvh6tn4zzmhiber5vu
Direct parametric reconstruction in dynamic PET myocardial perfusion imaging:in vivostudies
2017
Physics in Medicine and Biology
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of the theory of 4D image reconstruction for emission tomography is given along with a review of the current state of the art, covering both positron emission tomography and single photon emission computed ...
The other crucial components to image reconstruction (the objective function, the system model and the raw data format) are also covered, but in less detail due to the relatively straightforward extension ...
Acknowledgments This review and research was undertaken, in part, thanks to funding from the Canada Research Chairs program. ...
doi:10.1088/1361-6560/aa6394
pmid:28379843
pmcid:PMC5739089
fatcat:gokrwq2x25hrthjjqdcbgaesnq
Tomographic reconstruction of the pulse-echo spatiotemporal impulse response
2010
Medical Imaging 2010: Ultrasonic Imaging, Tomography, and Therapy
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The impulse response can also be difficult to predict numerically for a specific device because small unknown perturbations in array properties can generate significant changes in predicted pulse-echo ...
Virtually every area of ultrasonic imaging research requires accurate estimation of the spatiotemporal impulse response of the instrument, and yet accurate measurements are difficult to achieve. ...
Projections are linear transformations of the impulse response along lines in space. ...
doi:10.1117/12.845736
fatcat:2yfdgrx27vbzhar6mkcm4lps7u
4D image reconstruction for emission tomography
2014
Physics in Medicine and Biology
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Acknowledgments This review and research was undertaken, in part, thanks to funding from the Canada Research Chairs program. ...
state of the art in 4D image reconstruction for emission tomography. ...
Therefore the decomposition should only be seen as a means to reduce noise in the final spatiotemporal image.
Shape constraints. ...
doi:10.1088/0031-9155/59/22/r371
pmid:25361380
fatcat:dbhq74hapvbcfkkwjn2tkulumi
The meaning of interior tomography
2013
Physics in Medicine and Biology
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2013 pre-print arXiv:1304.7823v1 fatcat:usckqamikza4rj2epx4pcuxtaq
Recently, interior tomography research has led to theoretically exact relationships between localities in the projection and image spaces and practically promising reconstruction algorithms. ...
The classic imaging geometry for computed tomography is for collection of un-truncated projections and reconstruction of a global image, with the Fourier transform as the theoretical foundation that is ...
As another example, temperature-modulated bioluminescence tomography utilizes focused ultrasound to heat a small animal body, modulate bioluminescent light emission in vivo, and improve reconstructed image ...
doi:10.1088/0031-9155/58/16/r161
pmid:23912256
pmcid:PMC3775479
fatcat:brph56bh55e43pvwq2g4ukg24e
Joint estimation of dynamic PET images and temporal basis functions using fully 4D ML-EM
2006
Physics in Medicine and Biology
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A fully 4D joint-estimation approach to reconstruction of temporal sequences of 3D positron emission tomography (PET) images is proposed. ...
In addition to spatial image quality advantages, for smaller regions of interest (where statistical quality is often limited) the reconstructed time-activity curves show a lower level of bias and a lower ...
Continuing in the context of PET, the object is the PET isotope's spatiotemporal (4D) distribution. ...
doi:10.1088/0031-9155/51/21/005
pmid:17047263
fatcat:aidktwty7fgw7azly7yg7fkhnu
Core Imaging Library – Part II: Multichannel reconstruction for dynamic and spectral tomography
[article]
2021
arXiv
pre-print
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We formalise different optimisation problems for colour processing, dynamic and hyperspectral tomography and demonstrate CIL's capabilities for designing state of the art reconstruction methods through ...
In the first part of this two-part publication, we introduced the fundamentals of CIL. This paper focuses on applications of CIL for multichannel data, e.g., dynamic and spectral. ...
Emission Tomography (PET). ...
arXiv:2102.06126v2
fatcat:vfwguxnj3racfltlvqfqurxgre
Image reconstruction in higher dimensions: myocardial perfusion imaging of tracer dynamics with cardiac motion due to deformation and respiration
2015
Physics in Medicine and Biology
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This work develops a technique for a single photon emission computed tomography (SPECT) that reconstructs the distribution of the radiotracer concentration in the myocardium using a tensor product of different ...
These results are compared with the conventional 4D-spatiotemporal reconstruction method that models only the temporal changes of the tracer activity. ...
Defrise for fruitful discussions during the Fully 3D meeting in 2013 at Lake Tahoe, California. ...
doi:10.1088/0031-9155/60/21/8275
pmid:26450115
pmcid:PMC4636034
fatcat:d2vx5je6lvht7g2voyo6p2uumi
Extreme MRI: Large-Scale Volumetric Dynamic Imaging from Continuous Non-Gated Acquisitions
[article]
2020
arXiv
pre-print
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Conclusion: We demonstrated a method that can reconstruct massive 3D dynamic image series in the extreme undersampling and extreme computation setting. ...
Results: The proposed technique shows transient dynamics that are not seen in gating based methods. ...
Examples include ordered subset algorithms for positron emission tomography reconstruction [46, 47] and the algebraic reconstruction technique for computed tomography [48] . In MRI, Muckley et al. ...
arXiv:1909.13482v3
fatcat:orqwdyt2znhx7nypdan26v74im
A multiresolution spatial parameterization for the estimation of fossil-fuel carbon dioxide emissions via atmospheric inversions
2014
Geoscientific Model Development
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been limited by the highly heterogeneous and non-Gaussian spatiotemporal variability of emissions. ...
We finally implement this low-dimensional parameterization within an idealized inversion, where a sparse reconstruction algorithm, an extension of stagewise orthogonal matching pursuit (StOMP), is used ...
Thanks are due to Sharon Gourdji, Kim Mueller and Abhishek Chatterjee for fruitful discussions regarding algorithms, the challenges of working with field observations as well as some of the data used in ...
doi:10.5194/gmd-7-1901-2014
fatcat:dubnfz2665fiffd6kzefqrumte
Direct least-squares estimation of spatiotemporal distributions from dynamic SPECT projections using a spatial segmentation and temporal B-splines
2000
IEEE Transactions on Medical Imaging
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Index Terms-Dynamic single photon emission computed tomography (SPECT), fully four-dimensional (4-D) reconstruction, kinetic parameter estimation. ...
Artifacts can result when reconstructing a dynamic image sequence from inconsistent, as well as insufficient and truncated, cone beam single photon emission computed tomography (SPECT) projection data ...
Some preliminary results of this work were presented in the conference report [33] . ...
doi:10.1109/42.870254
pmid:11021687
fatcat:6d2atem2xvagpclii6uzwus3ym
Continuous-variable optical quantum-state tomography
2009
Reviews of Modern Physics
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Optical homodyne tomography is reviewed as a method of reconstructing the state of light in a given optical mode. ...
This review covers latest developments in continuous-variable quantum-state tomography of optical fields and photons, placing a special accent on its practical aspects and applications in quantum information ...
We thank Gina Howard for assistance in preparing the manuscript. ...
doi:10.1103/revmodphys.81.299
fatcat:rqygiib26zhtfb7kj3x2367aja
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