Core Committee


Mr. Ahmad Nobah, MSc, DABR

Founder, RadiationKnowledge

Ahmad Nobah is a medical physicist obtained his American Board of Radiology (ABR) certification in the field of radiotherapy in 2012. Currently, he works as a medical physicist in the Biomedical Physics department, King Faisal Specialist Hospital and Research Centre in Riyadh, Saudi Arabia. He is involved in many radiation oncology technological implementation and development, both clinically and research oriented disciplines. His advanced radiotherapy planning skills as one of the top planners worldwide in previous plan competitions inspired him to initiate the RadiationKnowledge (RK) initiative.

His main fields of interest are integrating Medical 3D Printing (M3DP), Virtual & Augmented Reality (VR/AR), and artificial intelligence applications in of radiotherapy and medicine in general. Designing patient specific phantoms fabricated with 1D, 2D, and 3D dose verification methods.


Dr. Waleed Alnajjar, PhD, DABR, DABMP

Co-Founder, RadiationKnowledge

Dr. Waleed obtained his Ph.D. in Medical Radiation Physics in 1998.  He then obtained his board certificates by ABR in 2000, and ABMP in 2001.  He currently runs a medical physics and dosimetry consulting group.  He has extensive experience implementing new initiatives, and has successfully developed and led planning and operations for large national and international health systems.  In addition to implementing new treatment modalities and providing support to various radiation oncology clinics, he specializes in resolving equipment and machine commissioning challenges.


Dr. Francois De Blois

Dr. François DeBlois is a Fellow of the Canadian College of Physicists in Medicine since 2007. He obtained his Ph.D. in 2001 from McGill University. He is an instructor in the McGill graduate medical physics program and has supervised many graduate students. Since 2017 he is head of physics at Centre Hospitalier Universitaire de Montréal (CHUM).

Dr. DeBlois main fields of interest are medical physics software, devices, treatment techniques development, and medical 3D Printing.


Dr. Noha Jastaniyah

Dr. Noha Jastaniyah Radiation Oncology Consultant at King Faisal Specialist Hospital and Research Center treating breast cancer and gynecological malignancies. She completed her residency in radiation oncology in 2012. She then did a research fellowship in image-guided adaptive brachytherapy for gynecological malignancies under Dr. Richard Poetter at the Medical University of Vienna, Austria which she completed in August of 2014.

She has been working since then at KFSH&RC and is the Radiation Oncology Residency Program Director which will commence in October of 2019.

Dr. Jastaniyah’s main field of interest is gynecological brachytherapy.


Dr. Melan Tomsej

Dr Milan Tomsej is head of Medical Physics Department of Charleroi University Hospital (CHU de Charleroi) since 2008, and teaches at ESTRO School in addition to Medical Imaging techs, medical physicists and radiation oncologists. He is an expert for the IAEA, member of the QUATRO auditors, and a member of the Steering Committee of Belgian Dosimetry Audits.

Dr. Tomsej main fields of interest in medical physics are dose calculation algorithms, Monte Carlo calculations, treatment techniques development, and radiotherapy and medical physics audit.