Research Summary

R. Peter Lokken earned his Master’s degree in Public Health at the Harvard School of Public Health (2006) and his MD (2007) from Harvard Medical School in Boston, MA. He completed a one-year Internal Medicine internship at UC San Diego (2008). Lokken’s four-year diagnostic radiology residency was at the Brigham and Women’s Hospital in Boston, MA (2008-2012). Lokken completed a one-year Interventional Radiology fellowship at UCSF in 2013. In 2013, he joined the University of Illinois Hospital Health & Science Center in Chicago as a radiologist specializing in vascular interventional radiology. In June 2018, he rejoined UCSF as an assistant professor of clinical radiology in the department’s Interventional Section.

Lokken is an associate editor for the Journal of Vascular and Interventional Radiology, the scientific journal of the Society for Interventional Radiology. His research focus is the investigation of clinical, genetic and immunological factors associated with outcomes of locoregional therapy for hepatocellular carcinoma and other malignancies.


Yale University, BA, 01/2000, History  Harvard Medical School, MD, 06/2007 Harvard School of Public Health, MPH, 05/2006, Quantitative Methods  University of California, San Diego, Internship, 06/2008, Internal Medicine  Brigham and Women's Hospital, Residency, 06/2012, Diagnostic Radiology  University of California, San Francisco, Fellowship, 06/2013, Vascular and Interventional Radiology 

Selected Publications

  1. Wu X, Kwong A, Heller M, Lokken RP, Fidelman N, Mehta N. Cost-effectiveness analysis of interventional liver-directed therapies for downstaging of hepatocellular carcinoma before liver transplant. Liver Transpl. 2023 Aug 29.  View on PubMed
  2. Blackburn AF, Landinez GP, Kerlan RK, Lokken RP. Malposition of a Femoral Tunneled Dialysis Catheter through a Patent Foramen Ovale. Semin Intervent Radiol. 2023 Jun; 40(3):304-307.  View on PubMed
  3. Wu X, Lokken RP, Mehta N. Optimal treatment for small HCC (<3 cm): Resection, liver transplantation, or locoregional therapy? JHEP Rep. 2023 Aug; 5(8):100781.  View on PubMed
  4. Wu X, Heller M, Lokken RP, Fidelman N, Lam A. Socioeconomic and Survival Analysis of Radioembolization in Patients with Intrahepatic Cholangiocarcinoma: A Propensity Score-Adjusted Study. J Vasc Interv Radiol. 2023 05; 34(5):815-823.e1.  View on PubMed
  5. Qureshy Z, Lokken RP, Kakar S, Grab J, Mehta N, Sarkar M. Influence of progestin-only hormonal use on hepatocellular adenomas: A retrospective cohort study. Contraception. 2023 03; 119:109915.  View on PubMed
  6. Shah RJ, Alqadi MM, Duvvuri M, Kim YJ, Tyagi R, Lokken RP, Gaba RC. Clinical Outcomes and Patency after Transjugular Intrahepatic Portosystemic Shunt Reduction for Overshunting Adverse Events. J Vasc Interv Radiol. 2022 12; 33(12):1507-1512.  View on PubMed
  7. Elkhadragy L, Khabbaz RC, Muchiri RN, Totura WM, Samuelson JP, Whiteley HE, van Breemen RB, Lokken RP, Gaba RC. Pharmacokinetics and Early Tumor Response to Conventional Transarterial Chemoembolization with Sorafenib and Doxorubicin in a VX2 Rabbit Tumor Model. J Vasc Interv Radiol. 2022 10; 33(10):1213-1221.e5.  View on PubMed
  8. Kohlbrenner R, Schwertner AB, Vogel AR, Conrad M, Lokken RP. Large thrombosed portomesenteric venous aneurysm treated with pharmacomechanical thrombolysis combined with TIPS placement. CVIR Endovasc. 2022 Feb 08; 5(1):11.  View on PubMed
  9. Lokken RP, Conrad MB. Nonoperative Management of Unstable Patients with Solid Organ Injury: An Incompletely Mapped Frontier. J Vasc Interv Radiol. 2021 08; 32(8):1156-1157.  View on PubMed
  10. Speir EJ, Hills NK, Lokken RP. Accuracy of Disclosed Financial Relationships between Radiologists and Industry at the 2018 RSNA Annual Meeting. Radiology. 2021 08; 300(2):433-435.  View on PubMed
  11. Gaba RC, Khabbaz RC, Muchiri RN, Morrison JD, Elkhadragy L, Totura WM, Samuelson JP, Whiteley HE, Deaton RL, Nguyen PL, Sverdlov M, Johnson JJ, van Breemen RB, Lokken RP. Conventional versus drug-eluting embolic transarterial chemoembolization with doxorubicin: comparative drug delivery, pharmacokinetics, and treatment response in a rabbit VX2 tumor model. Drug Deliv Transl Res. 2022 05; 12(5):1105-1117.  View on PubMed
  12. Lokken RP, Kerlan RK, Chung YC, Chen YF, Mehta NJ, Yao FY, Fidelman N. Hepatic Toxicity After Selective Chemoembolization Is Associated With Decreased Survival Among Patients With Hepatocellular Carcinoma. AJR Am J Roentgenol. 2021 05; 216(5):1283-1290.  View on PubMed
  13. Schwertner A, Kohlbrenner RM, Seeley EJ, Lokken RP. Nonfibered Packing Coil Embolization of Pulmonary Artery Pseudoaneurysm Resulting in a Delayed Endobronchial Coil Migration. J Vasc Interv Radiol. 2021 04; 32(4):626-628.  View on PubMed
  14. Compadre AJ, Kohi M, Lokken RP, Blissett S, Harris IS, Lucero J, Rosenstein MG, Sobhani NC. Catheter-Directed Thrombolysis for Submassive Pulmonary Embolism in the Third Trimester of Pregnancy. JACC Case Rep. 2020 Oct; 2(12):1899-1904.  View on PubMed
  15. Losey AD, Lokken RP, Kolli KP, Kerlan RK, Taylor AG, Kohi MP. Embolization of Arterial-Portal Fistula to Treat Associated Hemobilia after Transjugular Liver Biopsy. Semin Intervent Radiol. 2020 Oct; 37(4):430-433.  View on PubMed
  16. Knox J, Kohlbrenner R, Kolli K, Fidelman N, Kohi MP, Lehrman E, Lokken RP, Zagoria R, Kerlan RK, LaBerge J, Taylor AG. Intermediate to Long-Term Clinical Outcomes of Percutaneous Cryoablation for Renal Masses. J Vasc Interv Radiol. 2020 Aug; 31(8):1242-1248.  View on PubMed
  17. Kord A, James E, Herren J, Gaba RC, Lokken RP. Esophagopulmonary fistula causing pulmonary arterial pseudoaneurysms and massive hemoptysis. Radiol Case Rep. 2020 Jul; 15(7):914-920.  View on PubMed
  18. Koethe Y, Lokken RP, Lehrman ED, Kerlan RK, Roberts JP, Rhee SJ, Kohi MP, Kolli KP. Overdilation of a 6-mm Self-Expanding Stent with a 10-mm Balloon-Expandable Stent Graft Preserves Failing Meso-Rex Bypass. J Vasc Interv Radiol. 2020 03; 31(3):521-523.  View on PubMed
  19. Park BV, Gaba RC, Huang YH, Chen YF, Guzman G, Lokken RP. Histology of Hepatocellular Carcinoma: Association with Clinical Features, Radiological Findings, and Locoregional Therapy Outcomes. J Clin Imaging Sci. 2019; 9:52.  View on PubMed
  20. Bremer WA, Lokken RP, Gaba RC, Bui JT. Arterial-portal fistula treated with hepatic arterial embolization and portal venous aneurysm stent-graft exclusion complicated by type 2 endoleak. Radiol Case Rep. 2019 Oct; 14(10):1301-1305.  View on PubMed

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