School of Medicine


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  • Guido Davidzon

    Guido Davidzon

    Clinical Associate Professor, Radiology - Rad/Nuclear Medicine

    Bio Dr. Guido A. Davidzon is a physician-scientist board certified in Nuclear Medicine. He is an attending physician in Nuclear Medicine and Molecular Imaging at Stanford Health Care.

    He graduated with honors from medical school in Argentina and completed an internship at Yale University New-Haven Hospital in Connecticut. He did his residency and was chief resident at Stanford Health Care. He completed a research fellowship in mitochondrial diseases at Columbia University in New York and, a U.S. National Library of Medicine Award supported, Biomedical Informatics fellowship at Massachusetts General Hospital in conjunction with a Science Masters at MIT.

    Dr. Davidzon is a Clinical Associate Professor in the Department of Radiology at Stanford University. His clinical specialties include early diagnostic imaging of cancer, coronary artery disease, and dementias using molecular probes as well as the treatment of cancer for which he employs targeted radiopharmaceutical therapy.

    Dr. Davidzon investigates the use of machine learning in medical imaging to improve clinical outcomes, he is involved in the professional Society of Nuclear Medicine and Molecular Imaging. He serves as a peer reviewer for multiple medical journals. Dr. Davidzon is a native of Buenos Aires, Argentina and has lived in the U.S. for over a decade. He travels to Argentina frequently, with his wife and three sons.

  • Valentina Ferri

    Valentina Ferri

    Research Data Analyst 2, Rad/Nuclear Medicine

    Current Role at Stanford Nuclear medicine imaging instrumentation and data analysis, therapeutic nuclear medicine, radiation dosimetry, image processing, PET system simulations.

  • Benjamin Lewis Franc

    Benjamin Lewis Franc

    Clinical Professor, Radiology - Rad/Nuclear Medicine

    Bio Dr. Franc is a Clinical Professor of Radiology - Nuclear Medicine and Molecular Imaging. He completed his B.S and M.S. in Chemical Engineering at Stanford University, Stanford, CA. He completed his medical school training at University of Southern California, Keck School of Medicine. While conducting his residency at Stanford University, in the Division of Nuclear Medicine and Molecular Imaging, he was also the chief resident. Dr. Franc?s research interests include all aspects of PET-CT as he has nearly 20 years of experience in clinical Nuclear Medicine with particular expertise in PET-CT.

    Dr. Franc predominantly publishes and lectures on applications and innovations of PET-CT. He has proficiency in all aspects of PET radiopharmaceutical development, spanning the design of molecules, synthesis of radioligands, and use in animal and human imaging. He also has expertise in quantitative image analysis, development of novel post-processing image reconstruction methods, and the application of artificial intelligence in human diagnostics. Dr. Franc has implemented new radiopharmaceuticals in pre-clinical and clinical research PET imaging as well as for clinical PET with applications in cancer, infectious disease (HIV), and autoimmune disease (RA). He has applied advanced computational techniques, including deep learning, to extract predictive data for prognosis of various cancers and neurodegenerative diseases from molecular imaging modalities.

    Since joining the faculty at Stanford in 2018, Dr. Franc has received several awards including the Radiological Society of North America 2019 Margulis Award for Excellence in Research; RSNA 2019 Trainee Research; and Most read article in Radiology 2019. He has accepted the position of Director, Residency Program, Nuclear Medicine and Molecular Imaging as well as the Director, Radiology Value-Based Care Initiative. Dr. Franc has presented more than 40 abstracts at national and international meetings and published more than 90 papers in peer-reviewed publications, as well as 9 book chapters.

  • Kristina Elizabeth Hawk

    Kristina Elizabeth Hawk

    Clinical Instructor, Radiology - Rad/Nuclear Medicine

    Bio Kristina Elizabeth Hawk, MS MD PhD is a Nuclear Medicine Physician and Neuroradiologist. As a physician scientist, integrated MD/PhD training helped build a foundation to explore translational research efforts, using a full and intricate understanding of the research process, and the developed ability to understand, discuss and teach new emerging concepts. Dr. Hawk?s dissertation in Neuroscience focused on the regulation of Nitric Oxide Synthase in the dorsal and ventral striatum, exploring the neurochemical role of nitric oxide producing interneurons, and their ability to coordinate dopaminergic and glutamatergic signaling in areas of the brain relevant to cognition and motivated behavior.

    Eager to expand her passion into the field of Medical Radiation Physics, she also completed a separate Masters degree in Medical Radiation Physics. This provided her with in depth training of how therapeutic and diagnostic instruments use both ionizing and non-ionizing radiation in the clinical setting. She then completed her Medical Doctorate and Diagnostic Radiology Residency at the University of Southern California (USC), learning the art of medicine while serving the diverse population at Los Angeles County Hospital.

    Dr. Hawk completed clinical fellowship requirements in Nuclear Medicine at USC, and is now Board Certified by the American Board of Nuclear Medicine. She also completed a Neuroradiology fellowship at USC, and is Board Certified the American Board of Radiology. She served as both the Chief Resident and Chief Neuroradiology Fellow.

    Dr. Hawk has held multiple local and national leadership positions, including positions in the American College of Radiology (ACR), the American College of Nuclear Medicine (ACNM) and the Society of Nuclear and Molecular Medicine (SNMMI). Dr. Hawk is an editorial board member of the Journal of the American College of Radiology (JACR). She has served as the Vice-Chair for Education for the Nuclear Medicine Resident Organization of the ACNM, and the Educational Liaison for the Resident and Fellow Section of the ACR. Currently, she serves on the national ACR Commission for Women and General Diversity as well as the ACR Commission on Nuclear Medicine. Dr. Hawk also sits on the ACR Council Steering Committee.

    Dr. Hawk is committed to continually exploring the beautiful applications of ionizing and non-ionizing radiation to image and treat the human body.

  • Andrei Iagaru

    Andrei Iagaru

    Professor of Radiology (Nuclear Medicine) at the Stanford University Medical Center

    Current Research and Scholarly Interests Current research projects include:
    1) PET/MRI and PET/CT for Early Cancer Detection
    2) Targeted Radionuclide Therapy
    3) Clinical Translation of Novel PET Radiopharmaceuticals;

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