Jeff Amacker, MBA CFA, CEO

Jeff started his career as a design engineer and systems engineer at the Lockheed Missiles and Space Company. He then spent 28 years at Varian Medical Systems, the market leader in Radiation Therapy treatment systems. He managed development projects for new treatment machines, led the worldwide engineering team, and built the treatment planning business from infancy to a $250M+ annual, highly-profitable, market-leading business. He left Varian to found a successful startup, which he sold so he could join TibaRay as its CEO. Jeff is a chemical engineer with an MBA and is a CFA charter holder.

Arun Ganguly, PhD, COO & CTO

Arun (Arundhuti) Ganguly is a physicist with expertise in x-ray detector physics and medical imaging. She received her PhD from SUNY Buffalo in 2003 working on optimization of very high-resolution small area detectors for neuroimaging, She completed her postdoctoral research at Stanford University and continued there as a Senior Scientist working on combined MR/x-ray imaging systems and on Conebeam CT imaging. She then joined Varian Medical Systems as a Senior Scientist in Varian's central R&D team. There she worked with linear accelerators and focused on imaging in conjunction with these accelerators for use in radiation therapy of cancer and in security and inspection systems. She continued her career in the Advanced Development group at Varex Imaging, that was spun-off from Varian in 2017. Dr. Ganguly served as Consulting Associate Professor at Stanford Radiology for 6 years. She is the recipient of research grants from the NIH including an early career grant. She has authored multiple peer reviewed articles, book chapters, and patents. Dr. Ganguly joined TibaRay as a consultant in 2019 and then as the CTO and COO in 2020. Currently she leads the technical development team and is also in-charge of growing and managing the organization.

Carol Manchester, CPA, CFO

Bill Loo, MD PhD, Founder & Member, Board of Directors

Bill Loo is a physician-scientist Radiation Oncologist and Bioengineer, serving as Director of Thoracic Radiation Oncology and Director of New Technologies in Radiation Oncology at Stanford Cancer Institute. His clinical expertise is in state-of-the-art radiation therapy for lung/thoracic cancers, including stereotactic ablative radiotherapy (SABR) and 4-D image-guided radiation therapy. He is an internationally recognized expert on thoracic cancers and radiation therapy and serves on expert panels of the National Comprehensive Cancer Network that produces among the most widely adopted clinical practice guidelines for cancer. His clinical research is in clinical trials and implementation of new treatment techniques for lung cancer and development of new medical imaging and other biomarkers. He is principal investigator of a research lab recognized as a global leader in the biology of ultra-rapid FLASH radiation and development of next generation radiation technologies to deliver FLASH. He conceived of the revolutionary PHASER concept for radiation therapy and serves as co-leader of its research and development. Bill received his MD from University of California, Davis and his PhD in Bioengineering from University of California, San Francisco and Berkeley. He completed his Radiation Oncology residency training at Stanford University where he is now Professor of Radiation Oncology. He is certified by the American Board of Radiology in Radiation Oncology, and is a Fellow of the American Society for Radiation Oncology (ASTRO) and a Fellow of the American College of Radiology (ACR).

Sami Tantawi, PhD, Founder & Member, Board of Directors

Sami Tantawi is a faculty member at the SLAC National Accelerator Laboratory has been working on accelerators and RF technology for most of his career in both technical and leadership roles. He is the Chief Scientist in the Technology & Innovation Directorate leading the RF accelerator and source R&D efforts at SLAC. Through his work, there is a better understanding of RF breakdown processes. This has led to novel ways of optimizing linear accelerator design and will lead to the operation of highly efficient, higher gradient compact linacs. Sami received his Ph.D. in Electrical Engineering from the University of Maryland. He was awarded the US Particle Accelerator School Prize for achievements in Accelerator Physics and Technology in 2003.

Vinod Bharadwaj, D.Phil, Founder & EVP

Vinod is a senior research scientist with extensive experience in all aspects of particle accelerators , including simulations, technical design, manufacturing and operation of particle accelerator systems. He has worked at two DOE national accelerator laboratories, the SLAC National Accelerator Laboratory where he worked on the design of large international accelerator projects and previous to that at the Fermi National Accelerator Laboratory where he was in charge of the operation of the accelerator complex. Vinod is also well connected to colleagues from many of the world-wide high energy accelerator laboratories. Industry experience includes two years as a Senior Applications Manager at Luminescent, Inc., a start up working on software for computer and memory chip lithography. Vinod received his B.A., M.A. and D.Phil. from Oxford University, England.

Rebecca Fahrig, PhD Founder

Rebecca Fahrig is an expert in the development and application of advanced x-ray imaging techniques with the goal of improving guidance, increasing targeting accuracy, and evaluating outcomes during minimally invasive procedures. Rebecca earned her Ph.D. at the University of Western Ontario in 1999, where she was among the pioneers of C-arm-based conebeam CT imaging. She completed a postdoctoral fellowship at Stanford University developing an x-ray/MR hybrid system. She then joined the faculty of the Department of Radiology at Stanford, where she and her team – in collaboration with national and international clinical and scientific colleagues – developed new MR-compatible hardware, x-ray detectors, image reconstruction and correction algorithms, and protocols for clinical applications with funding from industry and NIH. Rebecca is currently Vice-president of Innovations, business area Advanced Therapies, at Siemens Healthcare GmbH where she directs a group of 50 scientists designing, prototyping and testing new applications and image guidance systems. She is also Professor at the Pattern Recognition Lab, Friedrich-Alexander University.

Peter Maxim, PhD, Founder

Peter Maxim is a medical physicist and biophysicist in Radiation Oncology at the University of California, Irvine. His vision is the development of advanced, curative radiation therapy for all types and stages of malignancies and new indications, such as cardiovascular illnesses, that will lead to increased survival worldwide from top cancer and non-cancer causes of mortality. His areas of emphasis are stereotactic ablative radiation therapy (SABR), four-dimensional computed tomography (4D CT), and the development of novel and safe radiation therapy that addresses the major technical challenge of accurately and precisely treating moving targets and anatomy. Peter is active in the area of ultra-rapid FLASH radiation and the development of next-generation radiation technologies to deliver FLASH. Peter received his Dipl. Phys. (M.Sc.) from the Technical University, Berlin, Germany, and his Dr. rer. nat. (Ph.D.) from Humboldt University, Berlin, Germany. He is certified by the American Board of Radiology in Therapeutic Radiologic Physics. He is currently a Professor and Vice Chair for Medical Physics at the University of California, Irvine.