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IKN-RS-SOP-14: Guidelines Wearing Personal Dosimeter



Personal dosimeters are small ionization chambers that, as the name implies, are usually worn in the pocket and extremities. The personal dosimeters are designed to measure x – rays and gamma ray exposures, they would also respond to beta energy.



To comply with Atomic Energy Licensing (Basic Safety Radiation Protection) Regulations 2010.



  • Radiation Safety Officer (RPO)
  • Physicist
  • Radiation Workers



Upon case.



Personal Dosimeter



New Radiation Workers or Radiation Workers transferred from other institutions shall apply the personal dosimeter by completed the IKN-RS-F-077 Personal Dosimeter Request and returned to the RPO or delegates within 7 days after reported to the respective department.

Whole Body Personal Dosimeter

  1. All Radiation Workers shall wear a dosimeter at all times when working with radioactive material.
  2. Dosimeter should be worn on the body that will receive high exposure between the waist and neck.
  3. Personal Dosimeter cannot transfer to unauthorised user.
  4. Do not use the personnel dosimeters other than those recommended by the local authorities.
  5. Do not use tapes that do not have a complete filter dosimeter.
  6. Do not allow any objects such as pens prevent the dosimeter.
  7. Dosimeter should be protected from any interference of heat, humidity, pressure and contamination.
  8. Do not worn dosimeter when not working with non – occupational exposure, such as medical and dental care while using X – rays. Legitimate exposure report is only valid when working with radiation area only.
  9. Dosimeter that was not used should be stored in a place that no radiation (background exposure) to prevent non – occupational exposure.
  10. Dosimeter should be change every month or instruct by RPO.
  11. Application of the new dosimeter shall start from the beginning of month, dosimeter during the month shall also be returned at the end of the month immediately for the purpose of dose assessment.
  12. If the user does not expose to any radiation exposure during the month, the dosimeter shall also be returned.
  13. If the user is wearing an apron plumbun and use two (2) dosimeter, the first dosimeter should be worn on the outside of the neck and a second dosimeter should be worn on the inside of the apron at the waist or chest (as appropriate). If you use only one dosimeter, the dosimeter should be worn on the chest or waist (as appropriate) on the inside apron.
  14. Please report to the RPO in the event of an accident involving suspected radiation.
  15. Users shall notify the Radiation Safety Officer if they no longer require a dosimeter at least one month before the date of termination.


Extremeties Personal Dosimeter (TLD Ring)

  1. Users have to wear a TLD Ring during the preparation of radiopharmaceuticals and inject a dose to the patient.
  2. TLD ring should be used inside the disposable gloves.
  3. TLD ring shealthed in your hand to be the most frequently used to handle radioactive materials, with the text facing the inside of the palm shown in Figure 1.
  4. Please remove and store the TLD ring at proper place (no risk of radiation exposure) if not dealing with radioactive materials.  
     14 Fig1


Electronic Personnel Dosimeter

  1. Electronic Personnel Dosimeter is strictly used for several condition;
    1. For short term visitor visit the Nuclear Medicine Department
    2. New radiation worker who not yet received the personal dosimeter
    3. Radiation worker who lost the personal dosimeter; for temporary
    4. Next of kin accompany patients receiving radioactive material therapy in radionuclide therapy room.
    5. Female pregnant radiation workers personnel if neccessary
    6. Radiation Workers handle with patient receiving radioactive therapy inside radionuclide therapy room and brachytherapy room.
    7. Radiation Workers or designated personnel managed death body containing radioactive.
    8. Emergency procedure involving radioactive material.
    9. To measure non radiation workers dose received while working with ionising radiations.
  2. Electronic pocket dosimeter is located in several locations such as;
    1. Nuclear Medicine Department
      • Diagnostic Nuclear Medicine
      • Nuclear Medicine Ward
      • Cyclotron Facility
      • Nuclear Medicine Administration Office
    2. Radiology Department
      • Medical Physicist Office
    3. Radiotherapy and Oncology Department
      • Medical Physicist Office
  3. Physicist shall ensure the electronic personnel dosimeter is working well before distribute to the user.
  4. Before use the electronic personnel dosimeter, user shall record the pre assement reading including date and time in a log book.
  5. After use the electronic personal dosimeter, user shall record the post reading and acknowledge the exposure received during the procedure.
  6. Any faulty from the electronic personel dosimeter shall be reported to the RPO.


  1. Atomic Energy Licensing (Basic Safety Radiation Protection) Regulations 2010.
  2. Nuclear Medicine Resource Manual, IAEA 2006.
  3. Radiation Protection in Nuclear Medicine, Radiation Protection Series Publication No. 14.2, ARPANSA 2008.
  4. Applying Radiation Safety Standards In Nuclear Medicine, Safety Reports Series No. 40 IAEA 2005.
  5. Release of Patients After Radionuclide Therapy, Safety Reports Series No. 63, IAEA 2009.



This Standard Operating Procedure (SOP) was developed based on compilation of best available information, knowledge, field experience, and general practices to provide guidance to IKN staff in performing the activities defined herein, in a consistent and standardised manner.
IKN does not guarantee nor accept any legal liability whatsoever arising from or connected to the accuracy, reliability, currency or completeness of any material contained herein.
IKN shall take no responsibility for and will not be held liable for this document being temporarily unavailable due to technical issues beyond our power and control.