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Non-isotropic noise correlation in PET data reconstructed by FBP but not by OSEM demonstrated using auto-correlation function

Pasha Razifar, Mark Lubberink, Harald Schneider, Bengt Långström, Ewert Bengtsson, Mats Bergström
2005 BMC Medical Imaging  
Conclusion: With asymmetric radioactivity distribution in PET, reconstruction using FBP, in contrast to OSEM, generates images in which the noise correlation is non-isotropic when the noise magnitude is  ...  The 3D data was rebinned to a 2D dataset using FOurier REbinning (FORE) followed by 2D reconstruction using either FBP or OSEM.  ...  For reconstruction of raw PET data, both FBP and OSEM which were included in the scanner software were used for reconstructing the data.  ... 
doi:10.1186/1471-2342-5-3 pmid:15892891 pmcid:PMC1142517 fatcat:ityxgh6ngvgx7dgortkafcp4su

Dynamic image denoising for voxel-wise quantification with Statistical Parametric Mapping in molecular neuroimaging

Stergios Tsartsalis, Benjamin B. Tournier, Christophe E. Graf, Nathalie Ginovart, Vicente Ibáñez, Philippe Millet, Jesús Malo
2018 PLoS ONE  
Purpose PET and SPECT voxel kinetics are highly noised.  ...  To our knowledge, no study has determined the effect of denoising on the ability to detect differences in binding at the voxel level using Statistical Parametric Mapping (SPM).  ...  This work was supported by the Jean and Madeleine Vachoux Foundation (Geneva, Switzerland) and by the Maria Zaousi Memorial Foundation (Athens, Greece) through a scholarship of the Hellenic State Scholarship  ... 
doi:10.1371/journal.pone.0203589 pmid:30183783 pmcid:PMC6124809 fatcat:yure66eaqzafbhjutefssmq2ca

A combined local and global motion estimation and compensation method for cardiac CT

Qiulin Tang, Beshan Chiang, Akinola Akinyemi, Alexander Zamyatin, Bibo Shi, Satoru Nakanishi, Bruce R. Whiting, Christoph Hoeschen
2014 Medical Imaging 2014: Physics of Medical Imaging  
By use of experimental and computer-simulation data, we demonstrate that by exploiting inter-Conference 9033: Physics of Medical Imaging channel noise correlations, MC reconstruction methods can improve  ...  The e' was shown to predict empirical precision across 54 imaging and reconstruction protocols, but with different correlation qualities for FBP and iterative reconstruction (IR) due to the non-linearity  ...  This is a manual process and can be time consuming in cases where several sections using different stains are required.  ... 
doi:10.1117/12.2043492 fatcat:fyzpc5m6jbh7fjohqpdmtzkhte

ÉCole De Physique Des Houches [chapter]

2007 Les Houches  
Established in 1951, the Physics School is located in a group of chalets surrounded by meadows and woods, at an altitude of 1150 m facing the Mont-Blanc range -a very favourable environment for intellectual  ...  The "ecole de Physique des houches", france ...is a resort village in the Chamonix valley in the French Alps.  ...  ., and Schmittbuhl, M. (2008) correlaTive analysis of recurrenT MulTicolor fluorescence iMaGes To characTerize in vivo The effecT of anTiveGf druGs on GlioBlasToMa TuMor develoPMenT Rodriguez, T.  ... 
doi:10.1016/s0924-8099(13)60020-7 fatcat:jydcwidbbnf3nppqp4x3pyu6ga

École de Physique des Houches [chapter]

2008 Les Houches  
Established in 1951, the Physics School is located in a group of chalets surrounded by meadows and woods, at an altitude of 1150 m facing the Mont-Blanc range -a very favourable environment for intellectual  ...  The "ecole de Physique des houches", france ...is a resort village in the Chamonix valley in the French Alps.  ...  ., and Schmittbuhl, M. (2008) correlaTive analysis of recurrenT MulTicolor fluorescence iMaGes To characTerize in vivo The effecT of anTiveGf druGs on GlioBlasToMa TuMor develoPMenT Rodriguez, T.  ... 
doi:10.1016/s0924-8099(13)60004-9 fatcat:nxiezedqabbbtnfqonvw6c3doi

École de Physique des Houches [chapter]

2006 Les Houches  
Established in 1951, the Physics School is located in a group of chalets surrounded by meadows and woods, at an altitude of 1150 m facing the Mont-Blanc range -a very favourable environment for intellectual  ...  The "ecole de Physique des houches", france ...is a resort village in the Chamonix valley in the French Alps.  ...  ., and Schmittbuhl, M. (2008) correlaTive analysis of recurrenT MulTicolor fluorescence iMaGes To characTerize in vivo The effecT of anTiveGf druGs on GlioBlasToMa TuMor develoPMenT Rodriguez, T.  ... 
doi:10.1016/s0924-8099(06)80084-3 fatcat:6w7diik2k5af7cpowh4xz3nsky

Power pulsing of the CALICE tile hadron calorimeter

Mathias Reinecke
2016 2016 IEEE Nuclear Science Symposium, Medical Imaging Conference and Room-Temperature Semiconductor Detector Workshop (NSS/MIC/RTSD)  
I will also discuss the complementary experimental approaches being adopted by the Hyper-Kamiokande experiment in Japan and the JUNO experiment in China.  ...  In this talk I will describe the scientific aims of DUNE, focussing on the experimental challenges in constructing an operating very large liquid argon time projection chamber detectors.  ...  M13A-9: A Direct Image Reconstruction Algorithm for PET Scanners Based on Monolithic Crystals Acknowledgments: This work was done as part of the INSERT collaboration, which is supported by the EC: FP7-  ... 
doi:10.1109/nssmic.2016.8069748 fatcat:zjgd7dmfdbhntb4kfwdtrlejhi

SU-FF-I-79: Java-Based Plugin for Tomographic Reconstruction for SPECT Data

M Andrade, M Costa, A Marques da Silva
2006 Medical Physics (Lancaster)  
On-board DTS images were reconstructed from a subset of the CBCT projection data (81 projections, 44 o ).  ...  Partially supported by a Varian research grant.  ...  PET data was acquired in 2D for 30 minutes using LIST mode (10 bins per cycle). PET images were then reconstructed using OSEM.  ... 
doi:10.1118/1.2240759 fatcat:5we2nvgwx5hrxcv2ngufce6obq

Metrology for Quantitative Imaging and Molecular Radiotherapy

Jill L Wevrett
2020
In situations where this is not feasible, the use of planar Petri dishes performed best as a generic calibrat [...]  ...  In particular, the preferable calibration method was demonstrated to be one that uses objects of a similar size and geometry to the regions of interest for which quantification is required.  ...  In particular, I am indebted to James who somehow continued to believe in me even when I lost the ability to do so and allowed me to constantly bounce ideas off him.  ... 
doi:10.15126/thesis.00853911 fatcat:my645qxeebe2xbuadcz7jgkuzm

Physical and Clinical Potential of offline PET/CT Imaging after Proton Radiotherapy

Antje-Christin Knopf
2009
This tremendous advantage of protons is, however, not always used to its full extent, because treatment planning and delivery in proton radiotherapy often implies unpredictable uncertainties.  ...  Data of 23 patients (9 patient data sets were acquired before, 14 within the framework of this work) with various tumor sites are analyzed.  ...  Reconstruction After data acquisition, the PET images should be reconstructed with filtered backprojection (FBP) and ordered-subset expectation maximization (OSEM) algorithms.  ... 
doi:10.11588/heidok.00009432 fatcat:4jh4nqtulbadhkwtwguzhta2ny

The role of serotonergic and dopaminergic mechanisms and their interaction in Levodopa-induced dyskinesias

Andreas Antonios Roussakis, Paola Piccini
2019
By using single photon emission computed tomography (SPECT) with 123I–Ioflupane and positron emission tomography (PET) with 11C–DASB and 11C–PE2I, the clinical studies conducted for this thesis aimed (  ...  However, to date, the underlying mechanisms of LIDs are not fully understood.  ...  The dynamic images were reconstructed with the standard Siemens settings using an FBP (direct inversion Fourier transform) algorithm on a 128 x 128 matrix, with zoom of 2.6 and 2mm isotropic pixel size  ... 
doi:10.25560/75512 fatcat:zqulssz74jd2bob3eo6j7oc6ty

Characterisation of high-burnup LWR fuel rods through gamma tomography

Stefano Caruso
2007
As indicated above, results provided by the transmission tomography measurements were employed in the emission tomography reconstruction phase, together with a calculated global efficiency matrix and input  ...  In addition to the tomographic reconstructions, the present research has also investigated the possibility to use single isotope activities, and/or isotopic concentration ratios from 134 Cs, 137 Cs, and  ...  ACKNOWLEDGEMENTS This research was carried out at the PROTEUS facility in the Laboratory for Reactor Physics and Systems Behaviour of the Paul Scherrer Institute (PSI), in the framework of the collaboration  ... 
doi:10.5075/epfl-thesis-3762 fatcat:3ekgmmdvmvb6dft65odyncufpa

Improving peri-operative staging in colorectal cancer

Christopher James Hunter, Gina Brown, Paris Tekkis, Bowel Disease Research Foundation (Great Britain), Croydon Health Services NHS Trust
2017
This suggests that, at least in rectal cancer, MRI is not only accurate when compared to histological staging, but can independently risk stratify patients with systemic disease.  ...  In a retrospective study of rectal cancer patients undergoing pre-treatment PET/CT and CT, I demonstrated that patients with high-risk features on rectal MRI have an odds ratio of 6 for synchronous metastatic  ...  Acknowledgements I am deeply grateful to a number of people without whom I would not have been able to complete this research project.  ... 
doi:10.25560/53287 fatcat:aunyse4hsvco3jex7ycxafhnxy

Investigation and Development of a Fully 3D Tilt Capable Hybrid SPECT-CT System for Dedicated Breast Imaging Investigation and Development of a Fully 3D Tilt Capable Hybrid SPECT-CT System for Dedicated Breast Imaging

Jainil Shah, Stephen Smith, Jainil Shah, Stephen, Timothy Turkington
2015 unpublished
X-ray mammography has been the gold standard for breast imaging for decades, despite the significant limitations posed by the two dimensional (2D) image acquisitions.  ...  Difficulty in diagnosing lesions close to the chest wall and axilla, high amount of structural overlap and patient discomfort due to compression are only some of these limitations.  ...  However, images acquired using DBT are not truly 3D since the reconstructed voxels are non-isotropic due to angular under sampling; all images except the one where the detector is orthogonal to the source  ... 
fatcat:hu3kr633gbbabc6zlcdcsirtu4