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  • Attending physician – Interventional neuroradiology
    Apr. 2019 – Department of interventional and diagnostic radiology Lausanne University Hospital, Switzerland
  • Resident Radiology / Interventional Neuroradiology Fellow Jan. 2013 – Apr. 2019 – Department of radiology
    Lausanne University Hospital, Switzerland
  • Resident
    Apr. 2011 – Dec. 2012 – Department of surgery and traumatology Jura Hospital, Delémont, Switzerland
  • Research fellow
    Jan. 2010 – Mar. 2011 – Ella Center for Melanoma Research Sheba Hospital, Tel Aviv, Israel
Dr. Steven Hajdu, ExCom member


  • Specialist in Invasive Neuroradiology – Board certification Jan 2021 FMH Swiss Medical Association
  • Specialist in Diagnostic Neuroradiology – Board certified Aug 2019 FMH Swiss Medical Association
  • Specialist in Radiology – Board certified. 2018 FMH Swiss Medical Association
  • Medical doctor (Summa Cum laude)
    2009 Semmelweis University – Faculty of medicine
    Thesis: « Silicone and autoimmunity » Eur J Clin Invest. 2010 Sep 29 Bachelor of Arts (Magna Cum Laude)
  • 2003 University of Arizona – College of Humanities
    Bachelor of Science (Cum laude & Honors) 2002 University of Arizona – College of Medicine


  • 2009 National Board of Medical Examiners, USA
    US medical licensing exam (USMLE) – Step 1 – 257/99
  • Israel Practitioner certificate 2010 Health ministry, Israel
  • Hungarian/EU Practitioner certificate
    2009 Office of Health Authorization, Hungary


Reviewer – Neuroradiology. Impact factor 2.5. Since 2017 2021

  • Bacher S, Hajdu SD, Maeder Y, Dunet V, Hilbert T, Omoumi P. Differentiation between benign and malignant vertebral compression fractures using qualitative and quantitative analysis of a single fast spin echo T2-weighted Dixon sequence. Eur Radiol. 2021 May 26. doi: 10.1007/s00330-021-07947-1. Epub ahead of print. PMID: 34041569.
  • Nannoni S, Kaesmacher J, Ricciardi F, Strambo D, Dunet V, Hajdu S, Saliou G, Mordasini P, Hakim A, Arnold M, Gralla J, Fischer U, Michel P. ASPECTS-based selection for late endovascular treatment: a retrospective two-site cohort study. Int J Stroke. 2021 Apr 22:17474930211009806. doi: 10.1177/17474930211009806. Epub ahead of print. PMID: 33787411.
  • Kaesmacher J, Meinel TR, Nannoni S, Olivé-Gadea M, Piechowiak EI, Maegerlein C, Goeldlin M, Pierot L, Seiffge DJ, Mendes Pereira V, Heldner MR, Grunder L, Costalat V, Arnold M, Dobrocky T, Gralla J, Mordasini P, Fischer U; BEYOND-SWIFT Investigators†. Bridging May Increase the Risk of Symptomatic Intracranial Hemorrhage in Thrombectomy Patients With Low Alberta Stroke Program Early Computed Tomography Score. Stroke. 2021 Mar;52(3):1098-1104. doi: 10.1161/STROKEAHA.120.030508. Epub 2021 Jan 28. PMID: 33504188.
  • Maslias E, Nannoni S, Ricciardi F, Bartolini B, Strambo D, Puccinelli F, Hajdu SD, Eskandari A, Saliou G, Michel P. Procedural Complications During Early Versus Late Endovascular Treatment in Acute Stroke: Frequency and Clinical Impact. Stroke. 2021 Mar;52(3):1079-1082. doi: 10.1161/STROKEAHA.120.031349. Epub 2021 Jan 20. PMID: 33467881.
  • Hajdu SD, Kaesmacher J, Michel PP, Sirimarco G, Knebel JF, Bartolini B, Kurmann CC, Puccinelli F, Mosimann PJ, Bonvin C, Arnold PM, Niederhäuser J, Eskandari A, Mordasini P, Gralla PJ, Fischer PU, Saliou PG. Association of Time of Day When Endovascular Therapy for Stroke Starts and Functional Outcome. Neurology. 2021 Jan 4;96(8):e1124–36. doi: 10.1212/WNL.0000000000011449. Epub ahead of print. PMID: 33397770; PMCID: PMC8055343.
  • Hajdu SD, Kaesmacher J, Michel P, Sirimarco G, Knebel JF, Bartolini B, Puccinelli F, Mosimann P, Bonvin C, Niederhauser J, Eskandari A, Mordasini P, Fischer U, Gralla J, Saliou G. Timing is brain: The impact of endovascular therapy start time on neurological outcome. Neurology. 2021 DOI: