Kwan Hoong Ng, PhD, FinstP, DABMP, received his MSc (medical physics) from the University of Aberdeen and PhD (medical physics) from the University of Malaya, Malaysia. He is certified by the American Board of Medical Physicists. Professor Ng was honoured as one of the top 50 medical physicists in the world by the International Organization of Medical Physics (IOMP) in 2013. He also received the International Day of Medical Physics Award in 2016. He has authored/co-authored over 230 papers in peer-reviewed journals, 25 book chapters and co-edited 5 books. Ngie Min Ung, PhD, MIPEM, MIPM, obtained Bachelor of Biomedical Engineering and Master of Medical Physics from the University of Malaya. He then completed his PhD at the University of Western Australia in collaboration with Genesis Cancer Care (formerly known as Perth Radiation Oncology). Dr. Ung is actively involved in medical physics teaching and research activities. To date, he has authored/co-authored over 70 peer-reviewed academic journal papers and supervised a total of 10 research PhD and master students to completion. Robin Hill PhD, MACPSEM, MAAPM received his MSc (Medical and Health Physics) from the University of Adelaide and PhD from the University of Sydney. He is actively engaged in radiation oncology medical physics research, teaching and clinical activities including volunteer involvement in several IAEA activities. Dr Hill has authored/co-authored more than 60 papers in peer-reviewed journals with a particular interest in therapeutic kilovoltage X-ray beam dosimetry. He is accredited in radiation oncology medical physics by the ACPSEM.