Oleksii Semeniuk, PhD, is a medical physicist at Rhode Island Hospital. He also is an assistant professor of radiation oncology and clinician educator at The Warren Albert Medical School of Brown University.
Dr. Semeniuk has presented at numerous conferences and collaborated on medical research published in academic journals.
Prior to joining Lifespan and Brown University’s residency program, he completed a radiation oncology physics residency through the University of Toronto’s program at the Princess Margaret Cancer Center in Toronto, Ontario.
He earned a master’s degree in condensed matter and optical physics and a doctoral degree in chemistry and material science from Lakehead University in Thunder Bay, Ontario. In addition, Oleksii completed the postdoctoral Program and Commission on Accreditation of Medical Physics Education Programs (CAMPEP) accredited certificate program in medical physics at Dalhousie University in Halifax, Canada.
He is a member of the American Association of Physicists in Medicine.
Contact
Email: [email protected]
Mailing Address:
Department of Radiation Oncology
Rhode Island Hospital
593 Eddy St. Providence, RI 02903
Biography
2022-Present: Medical Physicist, Department of Radiation Oncology, Rhode Island Hospital
2022-Present: Assistant Professor, Radiation Oncology, The Warren Albert Medical School of Brown University
Research Interests
- Development of the first amorphous PbO-based direct conversion X-ray medical imaging detector prototype
- Investigation of poly- and a-PbO photoconductors for application in direct conversion X-ray medical imaging detectors
- Measured transport properties of poly-PbO to establish its suitability for direct conversion detector applications
- Development of a liquid-crystal-based mammography technology
Education
2020: Commission on Accreditation of Medical Physics Education Programs (CAMPEP) accredited certificate, Dalhousie University, Halifax, Nova Scotia
2017: PhD (Chemistry and Material Science), Lakehead University, Thunder Bay, Ontario
2012: MSc (Condensed Matter and Optical Physics), Lakehead University, Thunder Bay, Ontario
Patents
Reznik, O. Semeniuk “Lead Oxide as Material of Choice for Direct Conversion Detectors”, Ch. 7, 129-155, Oxide Electronics, John Wiley and Sons, Book Editor: Asim Ray, (2021)
Publications
- O. Semeniuk, V. Malkov, M. J. P. Chamberland & R. A. Weersink “Monte Carlo Investigation of dose distribution of uniformly and non-uniformly loaded standard and notched eye plaques” submitted to Med Phys (2023).
- T. Stanescu, A. Shessel, C. Carpino-Rocca, E. Taylor, O. Semeniuk, W. Li, A. Barry, J. Lukovic, L. Dawson & A. Hosni “MRI-Guided Online Adaptive Stereotactic Body Radiation Therapy of Liver and Pancreas Tumors on an MR-Linac System,” Cancers, 14, 716 (2022).
- O. Semeniuk, A. Cherpak and J. Robar “Design and evaluation of 3D printable patient-specific applicators for gynecologic HDR brachytherapy,” Med Phys, 48(7): 4053-4063 (2021).
- O. Semeniuk, P. Sadeghi, J. D. Farah, K. Moran & J. Robar “Performance optimization of Capacitive Motion Sensing (CMS) system for intra-fraction motion detection during stereotactic radiosurgery,” BPEX, 6,1 (2019).
- Qamar, M. Amin, O. Grynko, O. Semeniuk, A. Reznik and A. Moewes “A Probe of Valence and Conduction Band Electronic Structure of Led Oxide Films for Photo‐detectors,” Chem. Phys. Chem. 16, 20(24):3328-3335 (2019).
- V. Nenashev, V. V. Valkovskii, J. O. Oelerich, A. V. Dvurechenskii, O. Semeniuk, A. Reznik, F. Gebhard & S. D. Baranovskii “Release of carriers from traps enhanced by hopping,” Phys. Rev. B, 98, 155207 (2018).
- V. Nenashev, J. O. Oelerich, K. Jandieri, V. V. Valkovskii, O. Semeniuk, A. V. Dvurechenskii, F. Gebhard, G. Juška, A. Reznik & S. D. Baranovskii “Field-enhanced mobility in the multiple-trapping regime,” Phys. Rev. B, 98, 035201 (2018).
- P. Karasyuk, Y. Shepelytskyi, O. Semeniuk, O. Bubon, G. Juska, I. Blevis and A. Reznik “Investigation of photoconductivity and electric field distribution in CZT detectors by time-of-flight (TOF) and charge extraction by linearly increasing voltage (CELIV),” J. Mater. Sci. Mater. Electron., 29(16),13941-13951 (2018).
- O. Semeniuk, O. Grynko, G. Juska and A. Reznik “Amorphous lead oxide (a-PbO): suppression of signal lag via engineering of the layer structure,” Nature Sci. Rep., 7, 13272 (2017).
- Qamar, K. LeBlanc, O. Semeniuk, A. Reznik, J, Lin, Y. Pan and A. Moewes “X-ray spectroscopic study of amorphous and polycrystalline PbO films, α-PbO and β-PbO for direct conversion imaging,” Nature Sci. Rep., 7,13159 (2017).
- O. Semeniuk, O. Grynko, G. Decrescenzo, G. Juska, K. Wang and A. Reznik “Characterization of polycrystalline lead oxide for application in direct conversion X-ray detectors,” Nature Sci. Rep., 7, 8659 (2017).
- O. Semeniuk, A. Csik, S. Kökényesi and A. Reznik “Ion-Assisted Deposition of Amorphous PbO Layers,” J. Mater. Sci., 52(13), 7937–7946 (2017).
- O. Semeniuk, G. Juska, J. -O. Oelerich, M. Wiemer, S. D. Baranovskii & A. Reznik “Charge transport mechanism in lead oxide revealed by CELIV technique,” Nature Sci. Rep., 6, 33359 (2016).
- O. Semeniuk, G. Juska, J. -O. Oelerich, S. D. Baranovskii and A. Reznik “Transport of electrons in Lead Oxide studied by CELIV technique,” J. Phys. D: Appl. Phys., 50(3), 035103 (2016).
- J. Berashevich, O. Semeniuk, O. Rubel, J. A. Rowlands, A. Reznik, "Lead monoxide α-PbO: electronic properties and point defect formation," J.Phys: Condens. Matter 25, 075803 (2013).
- J. Berashevich, O. Semeniuk, J. A. Rowlands, A. Reznik, "Anisotropy of the carrier effective masses in bulk α-PbO," EPL 99, 47005 (2012).