2005
Quantitative simultaneous 99mTc-ECD/123I-FP-CIT SPECT in Parkinson’s disease and multiple system atrophy
El Fakhri G, Habert M, Maksud P, Kas A, Malek Z, Kijewski M, Lacomblez L. Quantitative simultaneous 99mTc-ECD/123I-FP-CIT SPECT in Parkinson’s disease and multiple system atrophy. European Journal Of Nuclear Medicine And Molecular Imaging 2005, 33: 87-92. PMID: 16180033, DOI: 10.1007/s00259-005-1920-y.Peer-Reviewed Original ResearchConceptsMultiple system atrophyIdiopathic Parkinson's diseaseDopamine transporterDopamine transporter binding potentialNormal controlsVoxel-based statistical parametric mappingAsymmetry indexMultiple system atrophy patientsCompared to normal controlsCaudate nucleusDifferential diagnosis of idiopathic Parkinson’s diseaseDiagnosis of parkinsonian syndromesPatient-specific attenuationDiagnosis of idiopathic Parkinson's diseaseBinding potentialIdiopathic Parkinson's disease patientsDual-isotope SPECTVariable collimator responseParkinson's diseaseDifferential diagnosisDecreased perfusionStatistical parametric mappingPurposeThe purposeSystem atrophyParkinsonian syndromes
2004
Quantitative SPECT leads to improved performance in discrimination tasks related to prodromal Alzheimer's disease.
El Fakhri G, Kijewski M, Albert M, Johnson K, Moore S. Quantitative SPECT leads to improved performance in discrimination tasks related to prodromal Alzheimer's disease. Journal Of Nuclear Medicine 2004, 45: 2026-31. PMID: 15585477.Peer-Reviewed Original ResearchConceptsProdromal Alzheimer's diseaseMemory problemsAlzheimer's diseaseDiagnosis of prodromal Alzheimer's diseaseDiagnosis of prodromal ADClinical tasksMRI volume estimationsVariable collimator responseFollow-up periodDementiaGeneral spectral methodConverter groupFollow-upProdromal ADUniform attenuation mapQuestion groupsPairwise discriminant analysisSubjectsQuantitative approachDiscrimination accuracyAnterior cingulate gyrusAttenuation mapNonuniform attenuation mapNormal groupCingulate gyrus
2002
Quantitative Simultaneous 99MTc/123I Spect: Design Study and Validation With Monte Carlo Simulations and Physical Acquisitions
Fakhri G, Maksud P, Kijewski M, Zimmerman R, Moore S. Quantitative Simultaneous 99MTc/123I Spect: Design Study and Validation With Monte Carlo Simulations and Physical Acquisitions. IEEE Transactions On Nuclear Science 2002, 49: 2315. DOI: 10.1109/tns.2002.803819.Peer-Reviewed Original ResearchMonte Carlo simulationsBrain phantomCarlo simulationsSimultaneous dual-isotope imagingIterative ordered subsetsDigital brain phantomDual-isotope SPECT studyVariable collimator responseArtificial neural networkPhysical acquisitionEnergy windowNonuniform attenuationCollimator responseDual-isotope imagingPhantom acquisitionsScatter correctionClinical cameraNeural networkMontePhantomIsotope imagingCorrected projectionsSPECT studiesProjector/backprojectorClinical application
2001
Absolute Activity Quantitation From Projections Using an Analytical Approach: Comparison With Iterative Methods in Tc-99M and I-123 Brain SPECT
Fakhri G, Kijewski M, Moore S. Absolute Activity Quantitation From Projections Using an Analytical Approach: Comparison With Iterative Methods in Tc-99M and I-123 Brain SPECT. IEEE Transactions On Nuclear Science 2001, 48: 768. DOI: 10.1109/23.940161.Peer-Reviewed Original ResearchVariable collimator responseI-123 studiesOrdered subsets-expectation maximizationI-123Tc-99mTc-99Brain phantomAttenuation correctionAnthropomorphic brain phantomDigital brain phantomTc-99m studiesMonte Carlo simulated projectionsCollimator responseActivity quantitationPathological patientsBrain structuresBrain SPECTActivity distributionPoor spatial resolutionSPECT activityQuantitative accuracyFitting procedurePartial volume effectsCaudate nucleusCorpus callosumAbsolute Quantitation in Simultaneous 99mTc/123I Brain SPECT Using ANN: Design Optimization and Validation
Fakhri G, Maksud P, Moore S, Zimmerman R, Kijewski M. Absolute Quantitation in Simultaneous 99mTc/123I Brain SPECT Using ANN: Design Optimization and Validation. 2001, 3: 1429-1431. DOI: 10.1109/nssmic.2001.1008605.Peer-Reviewed Original ResearchMonte Carlo simulationsBrain phantomSimultaneous dual-isotope imagingDigital brain phantomDual-isotope SPECT studyVariable collimator responseCarlo simulationsNon-uniform attenuationI-123 imagingEnergy windowCollimator responseDual-isotope imagingPhantom acquisitionsOSEM algorithmArtificial neural networkPhysical acquisitionScatter correctionClinical cameraBrain structuresPhantomIsotope imagingMonteSPECT studiesActivity concentrationsTc-99
2000
Absolute activity quantitation from projections using an analytical approach: comparison with iterative methods in brain SPECT
Fakhri G, Kijewski M, Moore S. Absolute activity quantitation from projections using an analytical approach: comparison with iterative methods in brain SPECT. 2011 IEEE Nuclear Science Symposium Conference Record 2000, 3: 18/7-1811 vol.3. DOI: 10.1109/nssmic.2000.949215.Peer-Reviewed Original ResearchVariable collimator responseI-123 studiesI-123Tc-99Attenuation correctionTc-99mBrain SPECTDigital brain phantomTc-99m studiesMonte Carlo simulated projectionsCollimator responseActivity quantitationActivity estimationBrain phantomOSEM algorithmBrain structuresActivity distributionAccurate quantitationPoor spatial resolutionSPECT activityFitting procedurePartial volume effectsCaudate nucleusCorpus callosumSpatial resolution