Speaking of medical physicists, what impression do you have of their daily work? In public hospitals, they do not often interact with as many patients as frontline doctors and nurses, but they are indispensable members of the medical team. Their work includes four major professional areas: radiotherapy, diagnostic imaging, nuclear medicine, and radiation protection. They are experts in radiation physics.In their daily work, medical physicists primarily support medical staff in using radiation for diagnosis and treatment. This includes monitoring and maintaining radiation equipment, conducting technical data analysis, developing advanced radiological diagnostics and image-guided surgical techniques, and contributing to complex radiotherapy plans. Additionally, medical physicists ensure radiation safety in the hospital. Whenever a new instrument is introduced, they measure its performance and carefully calibrate radiation intensity, dose, and the accuracy of surgical navigation instruments to ensure patients receive safe and accurate treatment.Dr. Tong Ka-shun, a medical physicist at Pamela Youde Nethersole Eastern Hospital, entered the field of medical physics in 1996 and has worked in public hospitals for nearly 30 years. Over time, driven by his personal interests, unique talents, and many coincidences, he gradually embraced another role in the hospital—inventor.Despite a heavy workload, Dr. Tong remains passionate about solving problems for his colleagues and patients. He believes, "There are always more solutions than problems. When faced with a problem, some people back off, but we choose to try to solve it." Over the years, he has collaborated with various medical teams to create numerous innovations, striving to optimize patient care and medical training.Among his numerous innovations, the one that impressed Dr. Tong most was the Ultrasonic Visible Human Touch Model he developed in recent years. Each model, based on real patient data, is created using 3D printing technology. To replicate the texture of human surfaces and organs, Dr. Tong and his team developed new materials using data from animal tissue studies. These models enable medical staff to conduct realistic simulation training and plan complex treatments and surgeries.Dr. Tong recalled the challenges during the COVID-19 pandemic, when frontline medical staff dealt daily with patients suffering from pulmonary edema. Upon recognizing the need for enhanced training, Dr. Tong and his team developed a chest model to improve pulmonary water extraction training. The complexity of chest cavity tissues and structures, combined with the model’s large size, made the research and development process challenging. Through perseverance and innovation, they overcame these challenges and successfully completed multiple chest models, enhancing training and patient safety.With patience and a pursuit of precision, Dr. Tong and the Medical Physics team work closely with other medical teams to solve problems for colleagues and patients. Their dedication and efforts significantly contribute to improving medical care.