2017
Low‐dose CT reconstruction using spatially encoded nonlocal penalty
Kim K, Fakhri G, Li Q. Low‐dose CT reconstruction using spatially encoded nonlocal penalty. Medical Physics 2017, 44: e376-e390. PMID: 29027240, PMCID: PMC5927365, DOI: 10.1002/mp.12523.Peer-Reviewed Original ResearchConceptsLow Dose CT Grand ChallengeDose imagesDose dataFlying focal spotQuadratic surrogatesLow-dose CT reconstructionCT reconstruction methodImage qualityRadiation doseCT phantomFBP imagesRaw projectionsRebinning methodFocal spotLog-likelihoodReconstructed test imagesEfficient memory usageNesterov's momentum methodPoisson log-likelihoodGrand ChallengeComputed tomographyLow radiation doseCT reconstructionAccurate diagnostic featuresTest images
2014
Preliminary Investigation of CBCT Imaging Optimization for Image-Guided Radiation Therapy
Bian J, Sharp G, Park Y, Bortfeld T, Fakhri G. Preliminary Investigation of CBCT Imaging Optimization for Image-Guided Radiation Therapy. 2014, 1-4. DOI: 10.1109/nssmic.2014.7430871.Peer-Reviewed Original ResearchImage-guided radiation therapyCone-beam CTCone-beam CT image qualityImprove CBCT image qualityCBCT image qualityCone-beam CT imagesOptimization-based reconstruction algorithmsReduce patient doseImage qualityCBCT dataImages of improved qualityImaging doseReconstruction algorithmIterative reconstruction techniqueASD-POCSImage reconstruction algorithmPatient doseImprove image qualityRadiation therapyDose reductionRadiation doseImage-guidedDosePoor image qualityExposure levelsPhysical Aspects of Pediatric Nuclear Medicine Imaging
Fahey F, Lim R, El-Fakhri G. Physical Aspects of Pediatric Nuclear Medicine Imaging. 2014, 621-643. DOI: 10.1007/978-1-4614-9551-2_27.Peer-Reviewed Original ResearchNuclear medicine imagingReduction of radiation doseMedicine imagingQuality of nuclear medicine imagingNuclear medicine studiesApplications of nuclear medicineClinical resultsRadiation doseImage quality improvementTomographic reconstructionHybrid imagingMedicine studiesPatientsNuclear medicineChildrenReconstruction technique