Maryam Shirmohammad
Assistant Professor, Department of Radiation Oncology, University of California Irvine
Biography
Maryam Shirmohammad, Ph.D., DABR, is Assistant Professor in the Department of Radiation Oncology at the University of California, Irvine. She received a Ph.D. in Physics from the University of British Columbia in 2021 and completed a therapeutic medical physics residency at the University of Michigan in 2024. Shirmohammad became board certified by the American Board of Radiology in Therapeutic Medical Physics in February 2025. During her doctoral research at BC Cancer Research Institute, she developed an optical system for breath biomarker analysis based on Raman spectroscopy for lung cancer screening and discovered a novel Raman enhancement technique that improved the limit of detection for volatile organic compounds by at least two orders of magnitude, resulting in a provisional patent application.
At UC Irvine, Shirmohammad serves as the Ethos radiotherapy system physicist, overseeing the comprehensive quality assurance program and system applications. She has performed commissioning of the Varian Bravos HDR afterloader and various applicators, and has established standard operating procedures and guidelines for radiotherapy physics procedures. Her clinical expertise spans a range of radiation therapy modalities including 3D conformal radiotherapy, IMRT, VMAT, stereotactic radiosurgery, stereotactic body radiotherapy, and both HDR and LDR brachytherapy. She has contributed to multi-institutional collaborative projects, including the development of an integrated quality assurance phantom for frameless single-isocenter multitarget stereotactic radiosurgery with Stanford University and the University of Michigan.
Shirmohammad serves on the Continuing Medical Education Committee at UC Irvine School of Medicine and as an Advisory Board Member for the Physics and Astronomy Department at Cal Poly Pomona. She provides didactic teaching in radiation therapy physics and dosimetry and mentors medical physics residents. Her research has been published in journals including Frontiers in Oncology, Biosensors, and Bioengineering, and she serves as a peer reviewer for the Journal of Applied Clinical Medical Physics and the Journal of Vibrational Spectroscopy.
Return to topDistinctions
- American Board of Radiology Certification in Therapeutic Medical Physics, 2025
Areas of Expertise
- Therapeutic Medical Physics
- Adaptive Radiotherapy Quality Assurance
- Stereotactic Radiosurgery Dosimetry
- HDR Brachytherapy Applicator Commissioning
Recent Publications
- Capaldi DPI, Skinner LB, Pinkham DW, Zavgorodni S, Stafford O, Shirmohammad M, Matney JE, Dubrowski P, De Jean P, Grafil EM, Yu AS, “A multi-institutional trial evaluating the use of an integrated quality assurance phantom for frameless single-isocenter multitarget stereotactic radiosurgery”, Frontiers in Oncology, vol. 14, pp. 1445166, 2024.
- Shirmohammad M, Short MA, Zeng H, “Collision Enhanced Raman Scattering (CERS): An Ultra-High Efficient Raman Enhancement Technique for Hollow Core Photonic Crystal Fiber Based Raman Spectroscopy Gas Analyzer”, Biosensors, vol. 13, no. 11, pp. 979, 2023.
- Shirmohammad M, Short MA, Zeng H, “A New Gas Analysis Method Based on Single-Beam Excitation Stimulated Raman Scattering in Hollow Core Photonic Crystal Fiber Enhanced Raman Spectroscopy”, Bioengineering, vol. 10, no. 10, pp. 1161-1161, 2023.
- Shirmohammad M, Short M, Zeng H, “Single Beam Excitation Stimulated Raman Scattering and Molecular Collison Enhanced Raman Scattering in Hollow Core Photonic Crystal Fiber Enhanced Raman Spectroscopy for Gas Analysis”, 2023. Patent No. 63523728.
- Esquinas PL, Rodríguez-Rodríguez C, De La Vega JC, Bokharaei M, Saatchi K, Shirmohammad M, “188Re image performance assessment using small animal multi-pinhole SPECT/PET/CT system”, Physica Medica, vol. 33, pp. 26-37, 2017.
- Walker MD, Goorden MC, Dinelle K, Ramakers RM, Blinder S, Shirmohammad M, “Performance assessment of a preclinical PET scanner with pinhole collimation by comparison to a coincidence-based small-animal PET scanner”, J Nucl Med, vol. 55, no. 8, pp. 1368-74, 2014.
- Walker MD, Ramakers RM, Blinder S, Dinelle K, Shirmohammad M, van der Have F, “Comparison of Two Small Animal PET Scanners: Pinhole Collimation vs. Electronic Collimation” (opens in new tab), pp. 2191-2195, 2012. Presented at 2012 IEEE Nuclear Science Symposium and Medical Imaging Conference Record (NSS/Mic).
- Ay MR, Shirmohammad M, Sarkar S, Rahmim A, Zaidi H, “Comparative assessment of energy-mapping approaches in CT-based attenuation correction for PET”, Molecular imaging and biology, vol. 13, pp. 187-98, 2011.
- Shirmohammad M, Ay MR, Sarkar S, Ghadiri H, Rahmim A, “Comparative assessment of different energy mapping methods for generation of 511-keV attenuation map from CT images in PET/CT systems: A phantom study” (opens in new tab), pp. 644-647, 2008. Presented at 2008 5th IEEE International Symposium on Biomedical Imaging: From Nano to Macro.
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Last updated on 5/12/2026.