Dr. Christiana Subaar is a Senior Lecturer in the Department of Physics at the Kwame Nkrumah University of Science and Technology (KNUST) and a Professional Teacher with over two decades of experience in teaching STEM disciplines. Specializing in Medical Physics and Nuclear Science and Technology. She holds a Ph.D. in Health and Radiation Physics, an M.Phil. in Medical Physics, and a BSc in Applied Physics, with over two decades of experience in STEM education. Her teaching philosophy is centered on student empowerment and fostering a passion for scientific inquiry.

Her academic and research interests lie at the intersection of Medical Physics and Nuclear Science and Technology, focusing on the safe, secure, and peaceful application of ionizing radiation in medicine, industry, and research. Her current research focuses on enhancing radiation safety, particularly optimizing pediatric radiation doses in CT and digital radiography within the Ghanaian context. Her broader expertise spans diagnostic radiology physics, radiation protection and dosimetry, quality assurance of medical imaging equipment, nuclear instrumentation and radiation detection, nuclear reactor physics and safety, radioisotope applications, pathophysiology, Magnetic Resonance Imaging, and radiation therapy.

Beyond her research, Dr. Subaar is recognized for developing innovative curricula and mentoring students to become well-rounded professionals. Her long-term goal is to advance radiation safety culture, quality assurance practices, and the sustainable utilization of nuclear technology for healthcare, energy, and industrial development, with a special emphasis on physics-based techniques such as spectroscopy for early disease detection and diagnosis, in Ghana and across Africa through research, training, and policy engagement.