Medical Physics Unit

Medical physics is a branch of physics incorporating the application of physics and engineering to medicine and health. Medical physicists work closely with medical doctors and are employed in universities, medical schools, hospitals and medical research institutes.

The main area that medical physicist involves are in the treatment of cancer by ionizing radiation (radiation oncology), ultrasound and nuclear magnetic resonance (diagnostic radiology), diagnostic imaging with radionuclides (nuclear medicine), diagnostic imaging with x rays, and in the study of radiation hazards and radiation protection (health physics).

Medical physicists are generally involved in four areas of activities: -

  • clinical service and consultation
  • research and development
  • teaching
  • administration

Medical Physics Unit, UMMC was operated in 2006 and currently located at on the 2nd floor of Menara Timur, UMMC. The unit involves the cooperation of science officers (physics) of UMMC and medical physics lecturers of University Malaya. This unit has been agreed by the UMMC Board of Management to be placed under the auspices of the UMMC Clinical Governance.

The Department / Unit that requires the services of Medical Physics unit involves in:

  • use of diagnostic imaging apparatus – Department of Radiology, Nuclear Medicine Unit, Department of Clinical Oncology, Cardiorespiratory Unit, Endoscopy Unit (ERCP,) the Operation Theatre, Urology Unit and Department of Orthopaedic Surgery.
  • diagnostic imaging using radioactive materials - Nuclear Medicine Unit.
  • Medical therapy using radioactive materials - Nuclear Medicine Unit and Department of Clinical Oncology.
  • Treatment with ionizing radiation – Department of Clinical Oncology, Transfusion Medicine Unit.
  • Medical research - Department of Biochemistry, Department of Pharmacology, Department of Physiology, Department of Pharmacy, Department of Medical Microbiology and Clinical Diagnostic Laboratory.
  • Medical examination using non- ionizing radiation - Department of Radiology, Nuclear Medicine Unit, the Operation Theatre , Department of Orthopaedic Surgery, Department of Otorhinolaryngology, Department of Ophthalmology and Department of Obstetrics and Gynecology.

  • Responsible for license applications from appropriate authorities to cover any activity related to atomic energy in UMMC.
  • Provides information in regards of hazard identification, risk assessment and risk control pertaining radiation sources usage.
  • Develop and maintain Radiation Safety Program in UMMC.
  • Develop and maintain quality control procedures for all imaging equipments.
  • The Medical Physics Unit shall provide services to:
    1. Biomedical Imaging Department
    2. Nuclear Medicine Unit
    3. Clinical Oncology Unit
    4. Outpatient (ambulatory) and In-patient
    5. Transfusion Medicine Unit
    6. Critical care areas and operation theatre
    7. Medicine Department
    8. Surgery Department
    9. Faculty of Medicine (Pharmacy and Pharmacology Laboratories)

Training & RnD

Act 304 Atomic Energy Licensing Act 1984




  • World Health Organization
  • Security of High Activity Radioactive Sources
  • Improving the Security of Radioactive Sources in Industrial Radiography in South East Asia
  • Using the Bert Concept To Promote Public Understanding Of Radiation
    Radiation phobia can be greatly decreased if the simple BERT (Background Equivalent Radiation Time) concept is used to explain the radiation dose to patients undergoing x-ray examinations. It converts the radiation dose to an equivalent period of natural background radiation. It is understandable, it does not mention risk, and it educates the patient that human-made radiation is the same as the background radiation which gives them most of their annual dose.

    Ref: International conference on the radiological protection of patients organized by the International Atomic Energy Agency, Málaga, Spain, 26-30 March 2001. C&S PapersSeries 7/P, 784-787.
  • Usage of Medical Radiation for Radiological Procedures in Malaysia - 1990-1994
    Medical radiation usage for radiological procedures in Malaysia for 1990-1994 is reported; this information allows comparisons to be made with the United Nations Scientific Committee on the Effects of Atomic Radiation (UNSCEAR) Report. Additionally it is essential information for health care planners and providers. Malaysia is categorised as a health care level II country based on the UNSCEAR definition. In 1994, the number of physicians, radiologists, x-ray units and x-ray examinations per 1000 population was 0.45, 0.005, 0.065 and 183 respectively. 3.6 million x-ray examinations were performed in 1994, with chest radiography being the commonest study (63%). Examination frequency increased in computed tomography (161%), cardiac procedures (190%), and mammography (240%); while a decrease in barium studies (-23%), cholecystography (-36%), and intravenous urography (-51%) was noted. There is a potential and need to expand and upgrade radiological services.
    Medical Journal of Malaysia 1999; 54(2): 185-191


  • International Commission on Non-Ionizing Radiation Protection (ICNIRP)
  • World Health Organization
  • Radiation, Mobile Phones, Base Stations and Your Health
    Radiasi, telefon mudah alih, stesen pangkalan dan kesihatan anda
    by Dr Ng Kwan Hoong

    This 2005 second edition, written by Prof. Dr Ng Kwan Hoong, has been published for the Malaysian Multimedia Communications and Multimedia Commission (MCMC). This Commission regulates telecommunications and multimedia industries. It helps to separate facts from the myths surrounding the use of mobile phones and the safety issues regarding base stations. Presented in the Frequently Asked Questions (FAQ) manner, some of the human health effects from mobile phones and base station antennas are addressed. Some regulatory aspects are specific to Malaysia. For more information and how to get a hardcopy of the book, contact the MCMC.

Added Services

  1. Commissioning of New Irradiating Equipment
  2. Periodic checks on PPE
  3. Coordinator of safety & security management for radioactive source
  4. Provide radiation measurement for medical officers and other staff whose involved in the injection procedure of radiopharmaceutical (Tc - 99m Sulfur Colloid) to sentinel lymph node biopsy (SLNB ) patients.
  5. Provide high dose and low dose Radioiodine-131 therapy.
  6. Provide radiation measurement service for Yttrium-90 Sirtex  microspheres treatment procedures.
  7. Provide treatment planning by using software such as iPlan® and Eclipse and calculate doses based on the plans as prescribed by physicians for the treatment offered by the Department of Clinical Oncology, such as : 
    1. Stereotaktik/ stereotaktik radiosurgeri (SRS/SRT) 
    2. Intensity Modulated Radiotherapy (IMRT)
    3. CT-Aided Image Guided Intracavitary Brachytherapy (IGBT)


  • Pusat Perubatan Universiti Malaya,
    Lembah Pantai, 59100,
    Kuala Lumpur, MALAYSIA


  • Email :


  • Phone No : 03-79494422
    Fax : 03-79492030