2023
Utility of Gadolinium-Based Contrast in Initial Evaluation of Seizures in Children Presenting Emergently
Andrijauskis D, Woolf G, Kuehne A, Al-Dasuqi K, Silva C, Payabvash S, Malhotra A. Utility of Gadolinium-Based Contrast in Initial Evaluation of Seizures in Children Presenting Emergently. American Journal Of Neuroradiology 2023, 44: 1208-1211. PMID: 37652579, PMCID: PMC10549952, DOI: 10.3174/ajnr.a7976.Peer-Reviewed Original ResearchConceptsSeizure presentationMR imagingConsecutive pediatric patientsNew-onset seizuresEvaluation of seizuresIschemic/hypoxicImaging of patientsBrain MR imagingGadolinium-based contrast agentsNoncontrast studyAcute onsetHippocampal sclerosisPediatric seizuresPatient agePediatric patientsNormal findingsIntracranial hemorrhageEmergency departmentVascular anomaliesInpatient unitGadolinium contrastPatientsNeurodevelopmental lesionAdditive benefitSeizuresAssociation of Body Mass Index and Waist Circumference With Imaging Metrics of Brain Integrity and Functional Connectivity in Children Aged 9 to 10 Years in the US, 2016-2018
Kaltenhauser S, Weber C, Lin H, Mozayan A, Malhotra A, Constable R, Acosta J, Falcone G, Taylor S, Ment L, Sheth K, Payabvash S. Association of Body Mass Index and Waist Circumference With Imaging Metrics of Brain Integrity and Functional Connectivity in Children Aged 9 to 10 Years in the US, 2016-2018. JAMA Network Open 2023, 6: e2314193. PMID: 37200030, PMCID: PMC10196880, DOI: 10.1001/jamanetworkopen.2023.14193.Peer-Reviewed Original ResearchConceptsBody mass indexHigher body mass indexWaist circumferenceBMI z-scoreCross-sectional studyBrain healthCross-sectional analysisFunctional connectivityMass indexMean ageInterval developmentCorpus callosumAssociation of BMIHigher baseline body mass indexBaseline cross-sectional analysisBaseline body mass indexBrain integrityResting-state functional connectivityLongitudinal analysisFuture treatment trialsABCD studyLower microstructural integrityCognitive Development StudyAdolescent Brain Cognitive Development (ABCD) studyCardiovascular implications
2019
Diffusion tensor tractography in children with sensory processing disorder: Potentials for devising machine learning classifiers
Payabvash S, Palacios EM, Owen JP, Wang MB, Tavassoli T, Gerdes M, Brandes-Aitken A, Marco EJ, Mukherjee P. Diffusion tensor tractography in children with sensory processing disorder: Potentials for devising machine learning classifiers. NeuroImage Clinical 2019, 23: 101831. PMID: 31035231, PMCID: PMC6488562, DOI: 10.1016/j.nicl.2019.101831.Peer-Reviewed Original ResearchConceptsPosterior white matter tractsSupport vector machineAccurate classification rateNaïve BayesDifferent machineNeural networkVector machineRandom forestClassification rateRandom forest modelMachineEdge densityConnectivity metricsAlgorithmDTI/High accuracyForest modelMetricsAccuracyBrain's inabilityBayesClassifierNetworkSensory processing disordersClassificationWhite Matter Connectome Edge Density in Children with Autism Spectrum Disorders: Potential Imaging Biomarkers Using Machine-Learning Models
Payabvash S, Palacios E, Owen JP, Wang MB, Tavassoli T, Gerdes M, Brandes-Aitken A, Cuneo D, Marco E, Mukherjee P. White Matter Connectome Edge Density in Children with Autism Spectrum Disorders: Potential Imaging Biomarkers Using Machine-Learning Models. Brain Connectivity 2019, 9: 209-220. PMID: 30661372, PMCID: PMC6444925, DOI: 10.1089/brain.2018.0658.Peer-Reviewed Original Research
2018
Volumetric voxelwise apparent diffusion coefficient histogram analysis for differentiation of the fourth ventricular tumors
Payabvash S, Tihan T, Cha S. Volumetric voxelwise apparent diffusion coefficient histogram analysis for differentiation of the fourth ventricular tumors. The Neuroradiology Journal 2018, 31: 554-564. PMID: 30230411, PMCID: PMC6243467, DOI: 10.1177/1971400918800803.Peer-Reviewed Original ResearchDifferentiation of Cerebellar Hemisphere Tumors: Combining Apparent Diffusion Coefficient Histogram Analysis and Structural MRI Features
Payabvash S, Tihan T, Cha S. Differentiation of Cerebellar Hemisphere Tumors: Combining Apparent Diffusion Coefficient Histogram Analysis and Structural MRI Features. Journal Of Neuroimaging 2018, 28: 656-665. PMID: 30066449, DOI: 10.1111/jon.12550.Peer-Reviewed Original Research
2013
Variable Selection and Prediction Using a Nested, Matched Case-Control Study: Application to Hospital Acquired Pneumonia in Stroke Patients
Qian J, Payabvash S, Kemmling A, Lev MH, Schwamm LH, Betensky RA. Variable Selection and Prediction Using a Nested, Matched Case-Control Study: Application to Hospital Acquired Pneumonia in Stroke Patients. Biometrics 2013, 70: 153-163. PMID: 24320930, PMCID: PMC3954429, DOI: 10.1111/biom.12113.Peer-Reviewed Original ResearchConceptsMassachusetts General HospitalCase-control studyStroke patientsAcute ischemic stroke patientsBrain regionsMatched Case-Control StudyHospital-Acquired PneumoniaIschemic stroke patientsLarge prospective studiesUnconditional logistic regressionCase-control designSpecific brain regionsAcquired PneumoniaAcute infarctionClinical featuresProspective studyClinical variablesGeneral HospitalEpidemiologic studiesPatientsModern imagingLarger studyLogistic regressionAppropriate statistical analysisHAP studies
2008
Application of magnetic resonance urography in diagnosis of congenital urogenital anomalies in children
Payabvash S, Kajbafzadeh AM, Saeedi P, Sadeghi Z, Elmi A, Mehdizadeh M. Application of magnetic resonance urography in diagnosis of congenital urogenital anomalies in children. Pediatric Surgery International 2008, 24: 979. PMID: 18668256, DOI: 10.1007/s00383-008-2196-7.Peer-Reviewed Original ResearchConceptsMagnetic resonance urographyRenal nuclide scanCongenital urogenital anomaliesUrogenital anomaliesConventional imaging modalitiesUrinary tractNuclide scanJunction obstructionConventional intravenous urographyVesicoureteral junction obstructionPosterior urethral valvesImaging modalitiesUreteropelvic junction obstructionSoft tissue lesionsReliable noninvasive techniqueUrethral valvesEctopic kidneyIntravenous urographySurgical findingsMean ageFinal diagnosisUseful adjuvantCongenital anomaliesPolycystic kidneysMRU technique
2007
Evolution of Endoscopic Management of Ectopic Ureterocele: A New Approach
Kajbafzadeh A, Salmasi AH, Payabvash S, Arshadi H, Akbari HR, Moosavi S. Evolution of Endoscopic Management of Ectopic Ureterocele: A New Approach. Journal Of Urology 2007, 177: 1118-1123. PMID: 17296426, DOI: 10.1016/j.juro.2006.11.001.Peer-Reviewed Original ResearchConceptsEctopic ureteroceleTotal success rateGroup 2Group 1Ureterocele moietyEndoscopic treatmentVesicoureteral refluxUreterocele incisionUreterocele punctureSingle punctureDouble punctureNew onset vesicoureteral refluxConcomitant vesicoureteral refluxOpen surgical interventionNew endoscopic approachDouble J stentDifferent endoscopic modalitiesSuccess rateTreatment of childrenCommon endoscopic treatmentEndoscopic injectionSingle centerSurgical interventionEndoscopic modalitiesEndoscopic managementLaparoscopic Antegrade Continent Enema through VQ Stoma Skin Flaps Using Two Ports Long-Term Follow-Up
Kajbafzadeh AM, Sina AR, Moradi A, Payabvash S, Baharnoori M, Vejdani K. Laparoscopic Antegrade Continent Enema through VQ Stoma Skin Flaps Using Two Ports Long-Term Follow-Up. Journal Of Endourology 2007, 21: 78-82. PMID: 17263614, DOI: 10.1089/end.2006.0190.Peer-Reviewed Original ResearchConceptsAntegrade continent enemaSkin flapsLaparoscopic appendicostomyExcellent cosmetic appearanceStoma reconstructionBowel incontinenceIntractable constipationPeritoneal insufflationMcBurney's pointMinimal complicationsCosmetic appearancePeritoneal cavityDirect visionEnemaPatientsFlapConstipationAppendicostomySurgeryRapid recoveryAbdominal surfaceIrrigation regimenDistal tipChildrenFirst port
2006
Intravesical injection of botulinum toxin type A: Management of neuropathic bladder and bowel dysfunction in children with myelomeningocele
Kajbafzadeh AM, Moosavi S, Tajik P, Arshadi H, Payabvash S, Salmasi AH, Akbari HR, Nejat F. Intravesical injection of botulinum toxin type A: Management of neuropathic bladder and bowel dysfunction in children with myelomeningocele. Urology 2006, 68: 1091-1096. PMID: 17113899, DOI: 10.1016/j.urology.2006.05.056.Peer-Reviewed Original ResearchConceptsMaximal detrusor pressureClean intermittent catheterizationMaximal bladder capacityBowel dysfunctionBotulinum toxin ANeuropathic bladderIntermittent catheterizationBladder capacityDetrusor pressureToxin AMean maximal detrusor pressureBotulinum toxin type AVesicoureteral reflux gradeConventional urodynamic studiesToxin type ATreatment of childrenIncontinence gradeDetrusor hyperreflexiaUrine incontinenceIntravesical injectionReflux gradeUrodynamic studiesDetrusor muscleVesicoureteral refluxCystoscopic guidanceSmooth Muscle Cell Apoptosis and Defective Neural Development in Congenital Ureteropelvic Junction Obstruction
Kajbafzadeh AM, Payabvash S, Salmasi AH, Monajemzadeh M, Tavangar SM. Smooth Muscle Cell Apoptosis and Defective Neural Development in Congenital Ureteropelvic Junction Obstruction. Journal Of Urology 2006, 176: 718-723. PMID: 16813927, DOI: 10.1016/j.juro.2006.03.041.Peer-Reviewed Original ResearchBladder exstrophy and epispadias complex in sibling: case report and review of literature
Kajbafzadeh AM, Tajik P, Payabvash S, Farzan S, Solhpour AR. Bladder exstrophy and epispadias complex in sibling: case report and review of literature. Pediatric Surgery International 2006, 22: 767-770. PMID: 16896811, DOI: 10.1007/s00383-006-1741-5.Peer-Reviewed Original Research