2019
Assessment of Striatal Dopamine Transporter Binding in Individuals With Major Depressive Disorder
Pizzagalli D, Berretta S, Wooten D, Goer F, Pilobello K, Kumar P, Murray L, Beltzer M, Boyer-Boiteau A, Alpert N, Fakhri G, Mechawar N, Vitaliano G, Turecki G, Normandin M. Assessment of Striatal Dopamine Transporter Binding in Individuals With Major Depressive Disorder. JAMA Psychiatry 2019, 76: 854-861. PMID: 31042280, PMCID: PMC6495358, DOI: 10.1001/jamapsychiatry.2019.0801.Peer-Reviewed Original ResearchMeSH KeywordsAdultAutopsyCarbon RadioisotopesCocaineCross-Sectional StudiesDepressive Disorder, MajorDopamine AgentsDopamine Plasma Membrane Transport ProteinsFemaleHumansMaleNeostriatumPositron-Emission TomographyRecurrenceTissue BanksYoung AdultConceptsMajor depressive disorderDA transporter availabilityVentral tegmental areaDA transporterDAT availabilityTegmental areaDepressive disorderDA signalingPositron emission tomographyDAT expressionMcLean HospitalHealthy controlsMajor depressive disorder groupsNumbers of depressive episodesStriatal dopamine transporter bindingDA transporter levelsLevels of DAT expressionStriatal DAT expressionStriatal DAT availabilityDA transporter densityDAT binding potentialDopamine transporter bindingOlder healthy controlsMesolimbic pathwayDA clearance
2017
Frontostriatal and Dopamine Markers of Individual Differences in Reinforcement Learning: A Multi-modal Investigation
Kaiser R, Treadway M, Wooten D, Kumar P, Goer F, Murray L, Beltzer M, Pechtel P, Whitton A, Cohen A, Alpert N, Fakhri G, Normandin M, Pizzagalli D. Frontostriatal and Dopamine Markers of Individual Differences in Reinforcement Learning: A Multi-modal Investigation. Cerebral Cortex 2017, 28: 4281-4290. PMID: 29121332, PMCID: PMC6454484, DOI: 10.1093/cercor/bhx281.Peer-Reviewed Original ResearchMeSH KeywordsAdultBrain MappingConditioning, OperantDopamineDopamine Plasma Membrane Transport ProteinsFemaleHumansIndividualityMagnetic Resonance ImagingMaleNeural PathwaysPositron-Emission TomographyPrefrontal CortexRewardVentral StriatumYoung AdultConceptsDA transporterRL behaviourVentral striatumDA clearanceFunctional connectivityBinding potentialLevel of neurocognitive functioningIncreased intrinsic functional connectivityMulti-modal neuroimaging studiesResting-state functional connectivityPhasic DA activityStriatal DA transporterIntrinsic functional connectivityReinforcement learning behaviorMulti-modal investigationsFrontostriatal circuitsFrontostriatal connectivityFrontostriatal regionsOrbitofrontal cortexDA activityNeuroimaging studiesOrbitofrontal regionsDopamine markersNeurocognitive functionDopamine
2008
Sequential and simultaneous dual‐isotope brain SPECT: Comparison with PET for estimation and discrimination tasks in early Parkinson disease
Trott C, Fakhri G. Sequential and simultaneous dual‐isotope brain SPECT: Comparison with PET for estimation and discrimination tasks in early Parkinson disease. Medical Physics 2008, 35: 3343-3353. PMID: 18697558, PMCID: PMC2673561, DOI: 10.1118/1.2940605.Peer-Reviewed Original ResearchConceptsEnergy resolutionTime-of-flight PET scannerRealistic Monte Carlo simulationsAcquisition energy windowSequential SPECTSystem energy resolutionGamma cameraEnergy windowThree-head cameraPET scannerEmission energyMonte Carlo simulationsDual-isotope SPECTSimultaneous SPECTBrain PETTwo-headed cameraCarlo simulationsProdromal disease stagesIdentical physiological conditionsSpatial resolutionDiscrimination taskStriatal sizeActivity concentrationsEarly identification of PDCamera headIs absolute quantification of dopaminergic neurotransmission studies with 123I SPECT ready for clinical use?
Zaidi H, El Fakhri G. Is absolute quantification of dopaminergic neurotransmission studies with 123I SPECT ready for clinical use? European Journal Of Nuclear Medicine And Molecular Imaging 2008, 35: 1330-1333. PMID: 18523768, PMCID: PMC3124701, DOI: 10.1007/s00259-008-0842-x.Peer-Reviewed Original ResearchMeSH KeywordsBrainCaudate NucleusDopamineDopamine Plasma Membrane Transport ProteinsHumansIodine RadioisotopesLigandsMovement DisordersPutamenRadiopharmaceuticalsSynaptic TransmissionTomography, Emission-Computed, Single-Photon
2007
Validation of a Standardized Normalization Template for Statistical Parametric Mapping Analysis of 123I-FP-CIT Images
Kas A, Payoux P, Habert M, Malek Z, Cointepas Y, El Fakhri G, Chaumet-Riffaud P, Itti E, Remy P. Validation of a Standardized Normalization Template for Statistical Parametric Mapping Analysis of 123I-FP-CIT Images. Journal Of Nuclear Medicine 2007, 48: 1459-1467. PMID: 17704252, DOI: 10.2967/jnumed.106.038646.Peer-Reviewed Original ResearchMeSH KeywordsAgedBrainData Interpretation, StatisticalDopamine Plasma Membrane Transport ProteinsEssential TremorFemaleHumansImage Processing, Computer-AssistedMagnetic Resonance ImagingMaleMiddle AgedParkinson DiseasePilot ProjectsRadionuclide ImagingRadiopharmaceuticalsTropanesConceptsStatistical parametric mappingDopamine transporterStatistical parametric mapping analysisIntraclass correlation coefficientStriatal (123)I-FP-CIT uptakeParkinson's diseaseStatistical parametric mapping approachEssential tremorBland-Altman graphical analysisStriatal volumeDopaminergic cell lossDAT imagingLow intraclass correlation coefficientsParametric mappingSpatial normalizationNo significant differencePD patientsCustomized templateIntergroup analysisCell lossSpatial normalization procedureResults of groupSPM normalizationSignificant differenceSPECT