Program Personnel

Program Faculty

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Charles W. Beasley, Ph.D.
Associate Professor

Ching-Mei J. Feng, Ph.D.
Assistant Professor

Patricia Svolos, Ph.D.
Assistant Professor

Ponnada A. Narayana, Ph.D., M.Sc.

Current Residents

Ashley RubinsteinAshley Rubinstein received her B.A. in physics from Boston University in 2011. During her time at Boston University, she worked on the Large Hadron Collider at CERN and later performed proton therapy research at Massachusetts General Hospital. In the summer of 2011 she entered the medical physics program at the UT MD Anderson Cancer Center UTHealth Graduate School of Biomedical Sciences as a Howard Hughes Medical Institute Med-Into-Grad fellow. At MD Anderson she conducted her dissertation research investigating magnetic-field-induced radiation dose effects arising from thoracic irradiations with MRI-guided radiation therapy systems. She received her Ph.D. in June of 2017 and joined the UTHealth McGovern Medical School residency program in July of 2017.


Olaolu Osunbayo Ph.D.  got his undergraduate degree from Obafemi Awolowo University, in Nigeria. Subsequent to that, he completed his Ph.D. in biophysics, in 2017, at the University of Utah, under the supervision of Dr. Michael Vershinin, Dept. of Physics and Astronomy, University of Utah. His doctoral dissertation includes collaboration to develop a novel laser holographic optical tweezers technique for dynamic nano-assembly. His dissertation also includes contributions to  new physical understandings of near immotile or locally diffusive intracellular cargoes.

In May 2018, he completed a CAMPEP approved postdoctoral certificate in medical physics at the University of Florida and he joined West Physics Consulting immediately after graduation as a junior diagnostic medical physicist.

In July of 2019 he joined the medical physics residency program at UTHealth.



Physics Assistant

Luong ThaiMr. Thai has over 25 years of experience as a medical physics assistant performing clinical equipment performance evaluations as well as radiation safety functions.

Email: Luong Thai

Radiology Practitioner Assistant

Ricardo CodinaRicardo Codina, received his B.S. and MSRS from Weber State University. He joined the Department of Diagnostic & Interventional Imaging in 2010, where he began working in Interventional Radiology as an RPA. In 2018 he joined the Medical Physics department.

Email: Ricardo Codina

Program Manager

Marlene RamirezMarlene Ramirez, a native Houstonian, received her B.S. from Baylor University and her Master in Health Care Administration from Texas Woman’s University in the Texas Medical Center. She joined UTHealth in 2013 and transitioned to the Department of Diagnostic & Interventional Imaging in 2017.

Email: Marlene Ramirez