Ryan Bitar, MD
Hospital ResidentCards
About
Research
Publications
2025
Positron Emission Tomography Radiotracers for Identification of Site of Recurrence in Prostate Cancer After Primary Treatment Failure
Bitar R, Zurita P, Martiniova L, Zurita A, Ravizzini G. Positron Emission Tomography Radiotracers for Identification of Site of Recurrence in Prostate Cancer After Primary Treatment Failure. Cancers 2025, 17: 1723. PMID: 40427220, PMCID: PMC12109795, DOI: 10.3390/cancers17101723.Peer-Reviewed Original ResearchProstate-specific membrane antigenProstate-specific antigenProstate cancerPositron emission tomographyPositron emission tomography radiotracersBiochemical recurrenceF-FDGUpregulation of amino acid transportersProstate-specific membrane antigen expressionBiochemical recurrence of prostate cancerInvestigate positron emission tomographySerum prostate-specific antigenRecurrence of prostate cancerPrimary treatment failurePSMA-targeted agentsSite of recurrencePrimary prostate cancerSalvage therapyF-fluciclovineLocalized diseaseTreatment failureDefinitive managementMembrane antigenInvestigational agentsRadionuclide therapyPortal and Hepatic Vein Embolization versus Portal Venous Embolization Alone in Cirrhotic and Noncirrhotic Swine: A Pilot Study
Tefera J, Kuhn T, Matuschewski N, Meister E, Nguyenová J, Kao T, Mutonga M, Bitar R, Kahl V, Zhang X, Shewarega A, Chapiro J, Madoff D. Portal and Hepatic Vein Embolization versus Portal Venous Embolization Alone in Cirrhotic and Noncirrhotic Swine: A Pilot Study. Journal Of Vascular And Interventional Radiology 2025, 36: 1042-1050.e2. PMID: 40043833, DOI: 10.1016/j.jvir.2025.02.028.Peer-Reviewed Original ResearchPost-embolizationCirrhotic groupPortal venous embolizationHepatic vein embolizationPortal venous phaseNon-cirrhotic groupStudent's t-testFLR hypertrophyFLR increaseVein embolizationVenous phaseEffects of PVELiver volumeCT scanVenous embolizationEmbolizationCirrhotic liverFour-week intervalsWeeksT-testFLRLiverPilot studyYorkshire pigsPVE
2024
Interventional Oncology Meets Immuno-oncology: Combination Therapies for Hepatocellular Carcinoma.
Bitar R, Salem R, Finn R, Greten T, Goldberg S, Chapiro J. Interventional Oncology Meets Immuno-oncology: Combination Therapies for Hepatocellular Carcinoma. Radiology 2024, 313: e232875. PMID: 39560477, PMCID: PMC11605110, DOI: 10.1148/radiol.232875.Peer-Reviewed Original ResearchConceptsManagement of hepatocellular carcinomaHepatocellular carcinomaLocoregional therapyClinical trialsImage-guided locoregional therapiesEnd pointsStages of hepatocellular carcinomaTumor microenvironment mechanismsCatheter-directed therapyCombination of immunotherapyProspective clinical trialImaging end pointsStandard of careAdjuvant settingNovel immunotherapiesCombination therapyTherapy resistanceInterventional radiologistsImmunotherapyDisease stageTherapyDisease evolutionNovel biomarkersCarcinomaMicroenvironment mechanismsBreaking Ground on the Application of AI to HCC: It's All about Data.
Bitar R, Chapiro J. Breaking Ground on the Application of AI to HCC: It's All about Data. Radiology Artificial Intelligence 2024, 6: e240660. PMID: 39601669, PMCID: PMC11605136, DOI: 10.1148/ryai.240660.Peer-Reviewed Original ResearchResidual Ultrasound-Enhancing Agents Mimicking Portal Venous Gas
Bitar R, Langdon J, Kaur M, Crandall I, McNamara R, Revzin M. Residual Ultrasound-Enhancing Agents Mimicking Portal Venous Gas. Ultrasound Quarterly 2024, 40: e00694. PMID: 39466239, DOI: 10.1097/ruq.0000000000000694.Peer-Reviewed Original ResearchConceptsUltrasound enhancing agentsPortal venous gasBowel ischemiaAbdominal ultrasoundVenous gasEchogenic fociContrast-enhanced echocardiographyEvaluation of cardiac functionPortal venous systemSeries of casesSonographic detectionCardiac functionDifferential diagnosisPortal veinVenous systemObservational studyLiver parenchymaPortal triadsVascular patencyBowelIschemiaEchocardiographyLiverUltrasoundEffect of Filtered Blood Return on Outcomes of Pulmonary Aspiration Thrombectomy
Bitar R, Bozal S, Sisti A, Mojibian H, Marino A, Cornman-Homonoff J. Effect of Filtered Blood Return on Outcomes of Pulmonary Aspiration Thrombectomy. Journal Of Vascular And Interventional Radiology 2024, 35: 1447-1456. PMID: 38950819, DOI: 10.1016/j.jvir.2024.06.026.Peer-Reviewed Original ResearchPulmonary artery pressureAspiration thrombectomyPulmonary embolismArterial pressureDuration of intensive care unitSeverity of adverse eventsLength of hospital stayHigh-risk PEProcedure-related complicationsAdverse event ratesIntensive care unitMarker of procedural successFluoroscopy timeTransfusion requirementsBlood lossNo significant differenceTransfusion needsHospital stayPost-procedureProcedural successAdverse eventsSurrogate markerLaboratory valuesProcedural outcomesProcedural detailsUltrasound evaluation of portal venous gas and its mimics
Bitar R, Kaur M, Crandall I, McNamara R, Revzin M. Ultrasound evaluation of portal venous gas and its mimics. Abdominal Radiology 2024, 49: 2756-2769. PMID: 38735019, DOI: 10.1007/s00261-024-04328-2.Peer-Reviewed Original Research
2023
Direct stick embolization of a rectal venous malformation via transanal minimally invasive surgery
Bitar R, Ayoade O, Yekula A, Reddy V, Pantel H, Nassiri N. Direct stick embolization of a rectal venous malformation via transanal minimally invasive surgery. Journal Of Vascular Surgery Cases And Innovative Techniques 2023, 9: 101124. PMID: 37427040, PMCID: PMC10323409, DOI: 10.1016/j.jvscit.2023.101124.Peer-Reviewed Original ResearchRectal venous malformationsVenous malformationsInvasive surgeryElevated D-dimer levelsD-dimer levelsRare clinical entityLocalized intravascular coagulopathyComputed tomography urographyMagnetic resonance imagingPostembolization syndromeIntravascular coagulopathyPostoperative recoveryRectal massInterventional managementClinical entityTomography urographyVascular anomaliesRare caseResonance imagingSurgeryTAMISTargeted strategiesComplicationsEmbolizationMalformations
2022
Creation of an Ex Vivo Renal Perfusion Model to Investigate Microwave Ablation
Ortiz C, Dang A, Derrick K, O'Donnell B, Bitar R, Parker M, Veraza R, Bunegin L, Borrego M, Yamaguchi S, Walker J, Lopera J. Creation of an Ex Vivo Renal Perfusion Model to Investigate Microwave Ablation. Journal Of Vascular And Interventional Radiology 2022, 34: 40-45.e2. PMID: 36244634, DOI: 10.1016/j.jvir.2022.10.013.Peer-Reviewed Original Research
2021
Percutaneous Vertebral Augmentation
Bitar R, O’Donnell B, Hyman C. Percutaneous Vertebral Augmentation. 2021, 627-643. DOI: 10.1007/978-3-030-84172-0_44.Peer-Reviewed Original Research
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