2020
Reducing Radiation Dose and Contrast Medium Volume With Application of Dual-Energy CT in Children and Young Adults.
Tabari A, Gee M, Singh R, Lim R, Nimkin K, Primak A, Schmidt B, Kalra M. Reducing Radiation Dose and Contrast Medium Volume With Application of Dual-Energy CT in Children and Young Adults. American Journal Of Roentgenology 2020, 214: 1199-1205. PMID: 32286868, DOI: 10.2214/ajr.19.22231.Peer-Reviewed Original ResearchConceptsSingle-energy CTContrast material volumeDS-DECTDual-energy CTRadiation doseThird-generation dual-source CT scannerDual-source dual-energy CTDual-source CT scannerContrast volume reductionCT dose descriptorsMean patient ageApplications of dual-energy CTContrast medium volumeWeight-matched patientsYoung adultsReduce radiation doseLow radiation doseCohen's kappa testConsecutive childrenPatient ageRadiological findingsDose descriptorsPatient demographicsRetrospective studyKappa test
2015
Simplifying size-specific radiation dose estimates in pediatric CT.
Khawaja R, Singh S, Vettiyil B, Lim R, Gee M, Westra S, Kalra M. Simplifying size-specific radiation dose estimates in pediatric CT. American Journal Of Roentgenology 2015, 204: 167-76. PMID: 25539253, DOI: 10.2214/ajr.13.12191.Peer-Reviewed Original ResearchConceptsSize-specific dose estimateStatistically significant correlationDose estimatesBody weightTorso diameterSize-specific doseConsecutive CT examinationsMedian body weightPatient's body weightRadiation dose estimatesSignificant correlationPediatric CTCT examinationsEffective diameterIndividual patientsOverall body weightClinical settingPatientsDoseD(apChildrenAutomated softwareMeasured diameterBodyManual measurements
2014
[18F]-Fluoromisonidazole Positron Emission Tomography/Computed Tomography Visualization of Tumor Hypoxia in Patients With Chordoma of the Mobile and Sacrococcygeal Spine
Cheney M, Chen Y, Lim R, Winrich B, Grosu A, Trofimov A, Depauw N, Shih H, Schwab J, Hornicek F, DeLaney T. [18F]-Fluoromisonidazole Positron Emission Tomography/Computed Tomography Visualization of Tumor Hypoxia in Patients With Chordoma of the Mobile and Sacrococcygeal Spine. International Journal Of Radiation Oncology • Biology • Physics 2014, 90: 1030-1036. PMID: 25539367, PMCID: PMC4280072, DOI: 10.1016/j.ijrobp.2014.08.016.Peer-Reviewed Original ResearchMeSH KeywordsAdultAgedCell HypoxiaChordomaFeasibility StudiesFemaleHumansMaleMiddle AgedMisonidazoleMultimodal ImagingNeoplasm Recurrence, LocalPhotonsPilot ProjectsPositron-Emission TomographyProspective StudiesProton TherapyRadiopharmaceuticalsRadiotherapy DosageRelative Biological EffectivenessSacrococcygeal RegionSpinal NeoplasmsTomography, X-Ray ComputedTumor BurdenConceptsHypoxic subvolumesGross tumor volumeFMISO PET/CTRadiation therapyLocal recurrenceTumor volumeSacrococcygeal spinePositron emission tomography/computed tomographyRT dose escalationStage T2 tumorsEmission tomography/computed tomographyStandardized uptake valueMedian follow-upTreatment of chordomasChanges to treatmentVisualization of tumor hypoxiaDose escalationT2 tumorsTomography/computed tomographyMetastatic diseaseRecurrent chordomaUptake valueClinical characteristicsTumor hypoxiaFollow-upDose reduction in pediatric abdominal CT: use of iterative reconstruction techniques across different CT platforms
Khawaja R, Singh S, Otrakji A, Padole A, Lim R, Nimkin K, Westra S, Kalra M, Gee M. Dose reduction in pediatric abdominal CT: use of iterative reconstruction techniques across different CT platforms. Pediatric Radiology 2014, 45: 1046-1055. PMID: 25427434, DOI: 10.1007/s00247-014-3235-2.Peer-Reviewed Original ResearchConceptsIterative reconstruction techniqueSinogram-affirmed iterative reconstructionAdaptive statistical iterative reconstructionModel-based iterative reconstructionPediatric abdominal CTDose reductionIterative reconstructionAbdominal CTAdaptive iterative dose reductionMagnitude of dose reductionIncreased image noiseStatistical iterative reconstructionAIDR 3DReconstruction techniqueCT examinationsCT scanImage noiseReconstruction algorithmClinical settingDosing potentialClinical applicationImage qualityRadiology communityReconstruction principleImage interpretation
2013
Simultaneous 99mTc‐MDP/123I‐MIBG tumor imaging using SPECT‐CT: Phantom and constructed patient studies
Rakvongthai Y, Fakhri G, Lim R, Bonab A, Ouyang J. Simultaneous 99mTc‐MDP/123I‐MIBG tumor imaging using SPECT‐CT: Phantom and constructed patient studies. Medical Physics 2013, 40: 102506. PMID: 24089927, PMCID: PMC3785531, DOI: 10.1118/1.4820977.Peer-Reviewed Original ResearchConceptsScatter correctionDual-radionuclideContrast recoveryPhantom studyAnthropomorphic torso phantomPatient studiesTumor uptakeTumor imagingSPECT projectionsTorso phantomMonte-CarloPhantom dataPhantomIterative reconstructionOSEMProjection dataDR dataIncrease patient throughputNoise realizationsSPECT-CTImage reconstructionClinical studiesTumorTumor projectionPoisson noise
2010
Brown adipose tissue 18F-FDG uptake in pediatric PET/CT imaging
Hong T, Shammas A, Charron M, Zukotynski K, Drubach L, Lim R. Brown adipose tissue 18F-FDG uptake in pediatric PET/CT imaging. Pediatric Radiology 2010, 41: 759-768. PMID: 21161205, DOI: 10.1007/s00247-010-1925-y.Peer-Reviewed Original Research
2009
Pediatric FDG PET/CT: Physiologic Uptake, Normal Variants, and Benign Conditions1
Shammas A, Lim R, Charron M. Pediatric FDG PET/CT: Physiologic Uptake, Normal Variants, and Benign Conditions1. RadioGraphics 2009, 29: 1467-86. PMID: 19755606, DOI: 10.1148/rg.295085247.Peer-Reviewed Original ResearchMeSH KeywordsArtifactsChildFluorodeoxyglucose F18HumansImage EnhancementNeoplasmsPositron-Emission TomographyRadiopharmaceuticalsSubtraction TechniqueTomography, X-Ray ComputedConceptsPositron emission tomographyFDG uptakeBenign lesionsPhysiological uptakeIncreased (18)F-FDG uptakeFDG-PET/CT studiesPhysiological variantsHead and neckAssociated with pitfallsUrinary collecting systemPediatric oncology patientsPET/CT studiesFollow-up studyPET/computed tomographicBone marrowImprove patient treatmentOncology patientsNormal variantsPET image interpretationEmission tomographyPatient treatmentAttenuation correctionAdipose tissueBrown adipose tissueGastrointestinal tract