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Fractals in Neuroimaging

Author(s): Lahmiri S; Boukadoum M; Di Ieva A;

Several natural phenomena can be described by studying their statistical scaling patterns, hence leading to simple geometrical interpretation. In this regard, fractal geometry is a powerful tool to describe the irregular or fragmented shape of natural features, using spatial or time-domain statistical scaling laws (power-law behavior) to characterize real ...

Article GUID: 38468046


Brain PET Imaging in Small Animals: Tracer Formulation, Data Acquisition, Image Reconstruction, and Data Analysis

Author(s): Bdair H; Kang MS; Ottoy J; Aliaga A; Kunach P; Singleton TA; Blinder S; Soucy JP; Leyton M; Rosa-Neto P; Kostikov A;

Positron emission tomography (PET) is a noninvasive functional imaging modality that involves in vivo detection of spatiotemporal changes in the binding of radioactive pharmaceuticals (a.k.a. PET tracers) to their target sites in different organs. The development of new PET tracers commonly invol ...

Article GUID: 38006502


Bayesian workflow for the investigation of hierarchical classification models from tau-PET and structural MRI data across the Alzheimer's disease spectrum

Author(s): Belasso CJ; Cai Z; Bezgin G; Pascoal T; Stevenson J; Rahmouni N; Tissot C; Lussier F; Rosa-Neto P; Soucy JP; Rivaz H; Benali H;

Background: Alzheimer's disease (AD) diagnosis in its early stages remains difficult with current diagnostic approaches. Though tau neurofibrillary tangles (NFTs) generally follow the stereotypical pattern described by the Braak staging scheme, the network degeneration hypothesis (NDH) has su ...

Article GUID: 37920382


Dosimetry of [18F]TRACK, the first PET tracer for imaging of TrkB/C receptors in humans

Author(s): Thiel A; Kostikov A; Ahn H; Daoud Y; Soucy JP; Blinder S; Jaworski C; Wängler C; Wängler B; Juengling F; Enger SA; Schirrmacher R;

Background: Reduced expression or impaired signalling of tropomyosin receptor kinases (Trk receptors) are found in a vast spectrum of CNS disorders. [18F]TRACK is the first PET radioligand for TrkB/C with proven in vivo brain penetration and on-target specific signal. Here we report dosimetry dat ...

Article GUID: 37870640


Radiosynthesis and In Vivo Evaluation of Four Positron Emission Tomography Tracer Candidates for Imaging of Melatonin Receptors

Author(s): Bdair H; Singleton TA; Ross K; Jolly D; Kang MS; Aliaga A; Tuznik M; Kaur T; Yous S; Soucy JP; Massarweh G; Scott PJH; Koeppe R; Spadoni G; Bedini A; Rudko DA; Gobbi G; Benkelfat C; Rosa-Neto P; Brooks AF; Kostikov A;

Melatonin is a neurohormone that modulates several physiological functions in mammals through the activation of melatonin receptor type 1 and 2 (MT1 and MT2). The melatonergic system is an emerging therapeutic target for new pharmacological interventions in the treatment of sleep and mood disorde ...

Article GUID: 35420022


Evaluation of a personalized functional near infra-red optical tomography workflow using maximum entropy on the mean

Author(s): Cai Z; Uji M; Aydin Ü; Pellegrino G; Spilkin A; Delaire É; Abdallah C; Lina JM; Grova C;

In the present study, we proposed and evaluated a workflow of personalized near infra-red optical tomography (NIROT) using functional near-infrared spectroscopy (fNIRS) for spatiotemporal imaging of cortical hemodynamic fluctuations. The proposed workflow from fNIRS data acquisition to local 3D reconstruction consists of: (a) the personalized optimal mont ...

Article GUID: 34342073


COVID-FACT: A Fully-Automated Capsule Network-Based Framework for Identification of COVID-19 Cases from Chest CT Scans

Author(s): Heidarian S; Afshar P; Enshaei N; Naderkhani F; Rafiee MJ; Babaki Fard F; Samimi K; Atashzar SF; Oikonomou A; Plataniotis KN; Mohammadi A;

The newly discovered Coronavirus Disease 2019 (COVID-19) has been globally spreading and causing hundreds of thousands of deaths around the world as of its first emergence in late 2019. The rapid outbreak of this disease has overwhelmed health care infrastructures and arises the need to allocate ...

Article GUID: 34113843


Topographical distribution of Aβ predicts progression to dementia in Aβ positive mild cognitive impairment

Author(s): Pascoal TA, Therriault J, Mathotaarachchi S, Kang MS, Shin M, Benedet AL, Chamoun M, Tissot C, Lussier F, Mohaddes S, Soucy JP, Massarweh G, Gauthier S, Rosa-Neto P,

INTRODUCTION: Abnormal brain amyloid beta (Aβ) is typically assessed in vivo using global concentrations from cerebrospinal fluid and positron emission tomography (PET). However, it is unknown whether the assessment of the topographical distribution of Aβ pathology can provide additiona ...

Article GUID: 32582834


Chronic Neuroleptic-Induced Parkinsonism Examined with Positron Emission Tomography.

Author(s): Galoppin M, Berroir P, Soucy JP, Suzuki Y, Lavigne GJ, Gagnon JF, Montplaisir JY, Stip E, Blanchet PJ

Mov Disord. 2020 Apr 30;: Authors: Galoppin M, Berroir P, Soucy JP, Suzuki Y, Lavigne GJ, Gagnon JF, Montplaisir JY, Stip E, Blanchet PJ

Article GUID: 32353194


Development of "[11C]kits" for a fast, efficient and reliable production of carbon-11 labeled radiopharmaceuticals for Positron Emission Tomography.

Author(s): Jolly D, Hopewell R, Kovacevic M, Li QY, Soucy JP, Kostikov A

Appl Radiat Isot. 2017 Mar;121:76-81 Authors: Jolly D, Hopewell R, Kovacevic M, Li QY, Soucy JP, Kostikov A

Article GUID: 28038410


Visualization of SNARE-Mediated Organelle Membrane Hemifusion by Electron Microscopy.

Author(s): Mattie S, Kazmirchuk T, Mui J, Vali H, Brett CL

Methods Mol Biol. 2019;1860:361-377 Authors: Mattie S, Kazmirchuk T, Mui J, Vali H, Brett CL

Article GUID: 30317518


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