In Clinical Oncology, the Medical Physics Unit is responsible for radiation dosimetry and physical aspects of treatment planning, treatment delivery and treatment QA of sophisticated radiotherapy treatments, which include intensity modulated radiotherapy (IMRT), stereotactic radiotherapy (SRT) and radiosurgery (SRS), intensity modulated stereotactic radiotherapy (IMSRT), total body irradiation, total body electron irradiation, brachytherapy, intra-vascular brachytherapy and selective internal radiotherapy. Other services provided by the Unit include radiation safety and protection, system administration and management of the RT network and PACS system, equipment management, quality assurance and maintenance.

A commitment to high quality patient treatment service, Physicists working on an IMRT treatment plan.

Physicists assessing the dosimetry verification and QA data of an IMRT treatment plan.

A Physicist setting up a special in-house designed dosimetry phantom for verification of an IMRT treatment.

A Physicist testing the radiation beam alignment accuracy of a linear accelerator radiotherapy treatment machine.

Application of multi-modality imaging to aid target outlining for treatment planning and dose calculation. Accurate geometric fusion of the anatomical structures from PET, CT and MR images is important in planning of precision radiotherapy treatment. The diagram shows a CT-MR fused image.

Dosimetry assessment of a high doserate afterloading brachytherapy treatment of nasopharyngeal carcinoma.

Support the development of state-of-the-art treatment techniques such as IMSRT treatment.

Preventive maintenance and quality assurance is an essential measure to ensure reliable, proper and safe operation of radiation oncology equipment.