Georges El Fakhri, PhD, DABR
Elizabeth Mears and House Jameson Professor of Radiology and Biomedical Imaging, Therapeutic Radiology and of Biomedical Informatics & Data ScienceCards
About
Research
Publications
2026
Free‐Running Three‐Dimensional Cardiac Extracellular Volume Mapping in a Single Scan With Mid‐Scan Contrast Injection
Lee W, Han P, Marin T, Mounime I, Chi D, Bijari F, Normandin M, Fakhri G, Ma C. Free‐Running Three‐Dimensional Cardiac Extracellular Volume Mapping in a Single Scan With Mid‐Scan Contrast Injection. Magnetic Resonance In Medicine 2026 PMID: 41656589, DOI: 10.1002/mrm.70293.Peer-Reviewed Original ResearchSignal modelContrast injectionECV mapsMR signal modelCine imagesThree-dimensionalK-space dataInversion recoveryExtracellular volume mappingSpace alignmentContrast agent injectionCardiac MR imagesEjection fractionIn vivo studiesCardiac cine imagingEstimated ejection fractionHealthy subjectsHematocrit levelsAgent injectionMR imagingBlood samplesHeart motionGradient echo readoutThe ADAPT learning cancer treatment system: ARPA-H’s initiative to revolutionize cancer therapy
Bild A, Sangar M, McQuerry J, Ideker T, Kopetz S, Carey L, Nath A, Marcus D, Regier A, Rashid N, Barzilay R, Winer E, Salgia R, Malhotra J, Gentles A, Buetow K, Mahmood F, Markman D, Eddy J, Consortium T, Afkhami M, Alfaro-Munoz K, Alonso S, Alpert K, Anampa J, Bafna V, Balic M, Balko J, Barzilay R, Bates S, Bekaii-Saab T, Bernard V, Bild A, Boland G, Borad M, Buetow K, Buhle L, Burns R, Cannon T, Carey L, Castelnovo L, Chen R, Cianfrocca M, Clark A, Corcoran R, Delores A, Duesbery N, Fakhri G, Elkhanany A, Forrest S, Frankel P, Fuentes I, Gainor J, Gentles A, George M, Gevaert O, Giridhar K, Griffiths J, Haibe-Kains B, Hamilton S, Herrera N, Hilsenbeck S, Howard F, Hsu D, Huang S, Huppert L, Ideker T, Isaacs C, Kiefer L, Kelly E, Kim E, Kopetz S, Krogan N, Krop I, Laubichler M, Le L, Lee A, Lee H, Lee S, Li X, Lieu C, Lin N, Mahmood F, Maitra A, Maley C, Malhotra J, Managadze D, Marcus D, Markman M, Maru D, McQuerry J, Menter D, Messersmith W, Messervy M, Mizrahi J, Morris V, Nair R, Nanda R, Nath A, Newgen T, Ng K, Palmer J, Parikh A, Parker J, Perou C, Pesout T, Phillips T, Pichavant M, Plevritis S, Raghav K, Rai K, Rashid N, Razavi P, Regier A, Robson M, Salgia R, Sangar M, Santa-Maria C, Sattler M, Sayas A, Shaw K, Shen X, Shen J, Sherman M, Singhal S, Spears P, Specht J, Strickler J, Tam A, Tayob N, Thomas A, Vasmatzis G, Winer E, Wolff A, Xiao L, Yaeger R, Yim S, Yuan Y. The ADAPT learning cancer treatment system: ARPA-H’s initiative to revolutionize cancer therapy. Cancer Cell 2026, 44: 449-454. PMID: 41512871, PMCID: PMC12912820, DOI: 10.1016/j.ccell.2025.12.008.Peer-Reviewed Original ResearchIndividualized Treatment Effect Inference of HNC with Multimodal Data
Wei Y, Li Z, Woo J, Ouyang J, El Fakhri G, Liu X. Individualized Treatment Effect Inference of HNC with Multimodal Data. APSIPA Transactions On Signal And Information Processing 2026, 14 DOI: 10.1561/116.20250051.Peer-Reviewed Original Research
2025
Variance Extrapolated Class-Imbalance-Aware Domain Adaptive Myocardial Segmentation in Multi-Sequence Cardiac MRI
Xing F, Liu X, Aganj I, Fakhri G, Kim P, Choi B, Woo J. Variance Extrapolated Class-Imbalance-Aware Domain Adaptive Myocardial Segmentation in Multi-Sequence Cardiac MRI. IEEE Journal Of Biomedical And Health Informatics 2025, PP: 1-11. PMID: 41474995, PMCID: PMC12885328, DOI: 10.1109/jbhi.2025.3649765.Peer-Reviewed Original ResearchFeature spaceUnsupervised domain adaptation approachProblem of class imbalanceUnlabeled target domainDomain adaptation approachCardiac MRI segmentationPseudo-label selectionPseudo-labelsSource domainClass imbalanceTarget domainManual annotationSegmentation accuracyTarget dataMRI segmentationAdaptive approachHausdorff distanceTransfer informationData pointsDice coefficientData scarcityCardiac magnetic resonance imagingExperimental resultsMagnetic resonance imagingLate gadolinium enhancementQuantifying extracerebral off‐target contamination in [18F]MK6240 PET imaging using compartmental modeling
Fu J, Lois C, Tiss A, Sari H, Becker A, Sanchez J, Guehl N, Normandin M, Fakhri G, Johnson K, Price J. Quantifying extracerebral off‐target contamination in [18F]MK6240 PET imaging using compartmental modeling. Alzheimer's & Dementia 2025, 21: e099911. PMCID: PMC12739924, DOI: 10.1002/alz70856_099911.Peer-Reviewed Original ResearchDeep learning-based non-contrast MRI model for nasopharyngeal carcinoma diagnosis: an end-to-end gadolinium-free solution
Li Z, Shi Y, Wang L, Lu J, Liu X, Woo J, Ouyang J, Hu J, Zhou D, Gong W, Yang X, Yu H, Wang Y, Liu F, Dong Y, Ye M, Shi S, Chen X, Qiu M, El Fakhri G, Kong L, Sun X, Zheng Y, Shi Y, Yu H, Liu X. Deep learning-based non-contrast MRI model for nasopharyngeal carcinoma diagnosis: an end-to-end gadolinium-free solution. Npj Digital Medicine 2025, 8: 786. PMID: 41430426, PMCID: PMC12748797, DOI: 10.1038/s41746-025-02247-0.Peer-Reviewed Original ResearchState-of-the-art methodsState-of-the-artDeep learning modelsLearning modelsEnd-to-endExternal test setPerformance gainsAI assistanceFusion modelNon-contrast MRITest setGadolinium-based contrast agentsIndependent external setNasopharyngeal carcinoma diagnosisMulti-readerMulti-case studyNasopharyngeal carcinomaExternal setScan timeImpact of Depth-of-Interaction and Spatially-Variant Point-Spread-Function Model on the Performance of Ultra-High Resolution Brain PET
Zeng T, Najmaoui Y, Zhang J, Fontaine K, Hu Y, Chemli Y, Gallezot J, Sun C, Lu Y, Fakhri G, Carson R, Marin T. Impact of Depth-of-Interaction and Spatially-Variant Point-Spread-Function Model on the Performance of Ultra-High Resolution Brain PET. 2021 IEEE Nuclear Science Symposium And Medical Imaging Conference (NSS/MIC) 2025, 1-2. DOI: 10.1109/nss/mic/rtsd57106.2025.11287015.Peer-Reviewed Original ResearchSpatially-varying point spread functionPoint spread functionAccurate point spread functionPSF modelConvergence behaviorImage qualityPoint spread function modelReconstruction toolboxPSF parametersHigh-activity regionsBrain-dedicated PET scannersDepth of interactionPoint-spread-function modelingField of viewSpatial resolutionHuman scansContrast recoverySpread functionPET systemPET scannerReal phantomBrain phantomMonte Carlo simulationsBrain positron emission tomographyCarlo simulationsPhysics-Informed List-Mode Deep Image Prior Reconstruction with Motion Correction in 3D Brain PET
Chemli Y, Najmaoui Y, Normandin M, Fakhri G, Marin T, Ouyang J. Physics-Informed List-Mode Deep Image Prior Reconstruction with Motion Correction in 3D Brain PET. 2021 IEEE Nuclear Science Symposium And Medical Imaging Conference (NSS/MIC) 2025, 1-2. DOI: 10.1109/nss/mic/rtsd57106.2025.11287851.Peer-Reviewed Original ResearchDeep Image PriorList-modeContrast recoveryMotion correctionList-mode eventsReconstructed activity distributionHoffman brain phantomNoise-resolution trade-offML-EM reconstructionLow-count dataResolution phantomBrain phantomBrain positron emission tomographySuper-resolution effectActivity distributionModel attenuationML-EMBack-projection operationsFine structureDown-sampled dataNegative log-likelihoodImage registrationUnsupervised regularizerBack-projectionImage priorsPerformance Evaluation of FastIC+ for sub-100 ps TOF-PET Module Development
Mazzanti D, Gomez S, Mauricio J, Alozy J, Auffray E, Bandi F, Campbell M, Cardona C, Dolenec R, Fakhri G, Fernandez-Tenllado J, Gola A, Guberman D, Lowis C, Majewski S, Manera R, Mariscal-Castilla A, Penna M, Pestotnik R, Paterno A, Portero S, Sanuy A, Silva J, Terragni G, Ballabriga R, Gascon D. Performance Evaluation of FastIC+ for sub-100 ps TOF-PET Module Development. 2021 IEEE Nuclear Science Symposium And Medical Imaging Conference (NSS/MIC) 2025, 1-2. DOI: 10.1109/nss/mic/rtsd57106.2025.11287230.Peer-Reviewed Original ResearchCoincidence time resolutionLYSO:CeTime-of-flight positron emission tomographyDouble-sided readoutTOF-PET applicationDepth of interactionApplication-specific integrated circuitTOF-PETCorrect parallax errorsSilicon photomultipliersDetector arrayTime-of-flightParallax errorCrystal arrayTime resolutionLong crystalsReference crystalLYSOFWHMPerformance evaluationPower consumptionCrystalIntegrated CircuitsCa crystalsScintillationImpact of TOF Resolution on Required Angular Coverage in PET: a Monte Carlo Study
Razdevsek G, Dolenec R, Orehar M, Fakhri G, Majewski S, Pestotnik R. Impact of TOF Resolution on Required Angular Coverage in PET: a Monte Carlo Study. 2021 IEEE Nuclear Science Symposium And Medical Imaging Conference (NSS/MIC) 2025, 1-1. DOI: 10.1109/nss/mic/rtsd57106.2025.11287018.Peer-Reviewed Original ResearchTime-of-flight resolutionTime-of-flightArtifact-free reconstructionAngular coverageNEMA image quality phantomAngular sampling requirementsTime-of-flight informationInter-crystal scatterImage quality phantomDepth of interactionOpen geometrySystematic Monte Carlo simulationsDerenzo phantomTOF resolutionImage qualityPET scannerMonte Carlo simulationsElongation artifactsPoint sourcesMonte Carlo studyCarlo simulationsLesion contrastSpatial resolutionImage noiseSystem geometry
Academic Achievements & Community Involvement
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- March 26, 2026Source: CASE
Connecticut Academy of Science and Engineering Elects 36 New Members in 2026
- March 13, 2026
Connecticut Academy of Science and Engineering Elects Eight From YSM
- February 24, 2026
America’s First X-Ray: How Yale Advanced Medical Imaging
- November 10, 2025
NETS Awareness Day 2025
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