2022
Low-Dose Tau PET Imaging Based on Swin Restormer with Diagonally Scaled Self-Attention
Jang S, Lois C, Becker J, Thibault E, Li Y, Price J, Fakhri G, Li Q, Johnson K, Gong K. Low-Dose Tau PET Imaging Based on Swin Restormer with Diagonally Scaled Self-Attention. 2022, 00: 1-3. DOI: 10.1109/nss/mic44845.2022.10399169.Peer-Reviewed Original ResearchConvolutional neural networkSelf-attention mechanismSelf-attentionTransformer architectureComputer vision tasksLocal feature extractionLong-range informationVision tasksDenoising performanceSwin TransformerFeature extractionImage datasetsUNet structureNeural networkSwinComputational costReceptive fieldsImage qualityMap calculationNetwork structureArchitecturePET image qualityChannel dimensionsQuantitative evaluationDenoising
2016
Penalized MLAA with Spatially-Encoded Anatomic Prior in TOF PET/MR
Kim K, Yang J, Fakhri G, Seo Y, Li Q. Penalized MLAA with Spatially-Encoded Anatomic Prior in TOF PET/MR. 2016, 1-4. DOI: 10.1109/nssmic.2016.8069514.Peer-Reviewed Original ResearchSynthetic CT imagesAlternating direction methodAttenuation correctionImage qualityMR-based attenuation correctionTOF-PET dataPET emission dataPET image qualityTime-of-flight (TOFDirection methodCost functionCT imagesPET/MR scannersNoise componentsConsistency conditionsAnatomical MRIterative processComputer simulationsPET dataMLAAPET/MR scansImagesBone signalEmission dataTOF
2014
Quantitative simultaneous positron emission tomography and magnetic resonance imaging
Ouyang J, Petibon Y, Huang C, Reese T, Kolnick A, Fakhri G. Quantitative simultaneous positron emission tomography and magnetic resonance imaging. Journal Of Medical Imaging 2014, 1: 033502-033502. PMID: 26158055, PMCID: PMC4306197, DOI: 10.1117/1.jmi.1.3.033502.Peer-Reviewed Original Research
2012
MRI-Based Nonrigid Motion Correction in Simultaneous PET/MRI
Chun Y, Reese T, Ouyang J, Guerin B, Catana C, Zhu X, Alpert N, Fakhri G. MRI-Based Nonrigid Motion Correction in Simultaneous PET/MRI. Journal Of Nuclear Medicine 2012, 53: 1284-1291. PMID: 22743250, PMCID: PMC4077320, DOI: 10.2967/jnumed.111.092353.Peer-Reviewed Original ResearchConceptsChannelized Hotelling observerMotion correctionDetection signal-to-noise ratioSignal-to-noise ratioMRI-based motion correctionRespiratory motion correctionMotion-corrected reconstructionOrdered-subsets expectation maximization algorithmNonrigid motion correctionChannelized Hotelling observer studyPET image qualityNonrigid image registration methodCoincidence dataDeformable phantomRespiratory gatingReduce radiation doseDynamic phantomImage registration methodReduced signal-to-noise ratioSimultaneous PET/MRICost of increased noiseHotelling observerPhantomAttenuation measurementsRabbit studies
2010
MRI-Assisted PET Motion Correction for Neurologic Studies in an Integrated MR-PET Scanner
Catana C, Benner T, van der Kouwe A, Byars L, Hamm M, Chonde D, Michel C, Fakhri G, Schmand M, Sorensen A. MRI-Assisted PET Motion Correction for Neurologic Studies in an Integrated MR-PET Scanner. Journal Of Nuclear Medicine 2010, 52: 154-161. PMID: 21189415, PMCID: PMC3125596, DOI: 10.2967/jnumed.110.079343.Peer-Reviewed Original ResearchConceptsLines of responseMotion correctionPET motion correctionRigid-body motion correctionMC algorithmPET volumesQuantitative accuracyMR-PET scannersPET image qualityScatter sinogramEcho-planar imagingHoffman phantomSinogram spaceList-modeRandom coincidencesMotion tracking techniquePrototype scannerPhantom volumeImage qualityMR-PETMC methodPET dataSinogramPhantomVolunteer studies
2006
Optimizing Acquisition Parameters in TOF PET Scanners
Surti S, El-Fakhri G, Karp J. Optimizing Acquisition Parameters in TOF PET Scanners. 2006, 4: 2354-2359. DOI: 10.1109/nssmic.2006.354386.Peer-Reviewed Original ResearchNoise equivalent countCho SNRNon-TOF scannerScan timePET image qualityPatient dosageTime-of-flightSingles ratesOptimal acquisition parametersPET scannerTOF scannerDiameter cylinderIncreasing scan timeImage qualityReduce scan timeMeasure of signal-to-noise ratioSignal-to-noise ratioSpatial resolutionSNRAcquisition parametersLesion detectionLesionsTOFCylinderIncreased activity
2003
A Multi-Scanner Evaluation of PET Image Quality Using Phantom Studies
Surti S, Badawi R, Holdsworth C, Fakhri G, Kinahan P, Karp J. A Multi-Scanner Evaluation of PET Image Quality Using Phantom Studies. 2003, 4: 2425-2427. DOI: 10.1109/nssmic.2003.1352384.Peer-Reviewed Original ResearchSignal-to-noise ratioImage signal-to-noisePET image qualityImage signal-to-noise ratioDiameter phantomImage qualityPhantom diameterPET scannerNEC ratesPhantom studyMeasures of image qualitySignal-to-noisePhantomAcquisition modeFilter observerSpecific tasksAccurate measurementRate dropsSinogramScannerPreliminary resultsECAT