[Skip to Content]

National Radiation Laboratory

National Radiation Laboratory
Te Whare Rangahau Pūhihi o Aotearoa

Go to homepage - New Zealand Ministry of Health

Personal Dosimetry Service

The NRL’s Personal Dosimetry Service is available to measure occupational dose to those exposed to ionising radiation in the course of their work.

For those working in Australia who wish to know more about our services, please contact Australian Radiation Services Pty Ltd.

In this section:

Trunk monitoring

Two systems are available for monitoring exposure to the trunk.  Both systems use Kodak Personal Monitoring Film, Type 2, in plastic holders.  The film gives a permanent re-examinable record of both quantitative and qualitative aspects of the radiation dose received by the wearer.

Yellow holder Situations in which the use of the film + yellow holder dosemeter is of benefit are:
  • Where x-rays produced with tube voltages between 20 kVp and 180 kVp are used (such as in working in medical x-ray diagnosis, chiropractic, veterinary, dental, mammographic and podiatric practices).

  • Where technetium-99 and thallium-201 are used, such as in nuclear medicine (scintigraphy) departments.

  • Where iodine-125 is used, such as in research laboratories.

Blue holder Situations in which the use of the film + blue holder dosemeter is of benefit include all situations the film + yellow holder dosemeter is of benefit, and:

  • Where x-ray machines, linear accelerators, and radioactive materials are used for treating disease.  This includes the following occupations: radiotherapists, radiation therapists, nuclear medicine radiographers involved in the use of iodine-131, medical physicists etc.

  • Where industrial radiography is carried out in non-destructive testing.

  • Where a wide range of sealed and unsealed radioactive materials are used as tracers in medical and other laboratories.

Back to top:

Extremity monitoring

The NRL offers a ring dosemeter that uses thermoluminescent material as a means of assessing radiation dose.  The ring holder comes in a single size and uses a small radiation sensitive element contained in a cavity in the ring.  The cavity is sealed with a black polythene cover.  An identification number and the wearer’s initials can be seen through the back of the ring cavity.

Ring dosemeter

Situations in which the use of a ring dosemeter is of benefit are:

  • Where unsealed sources containing gamma and high-energy beta emitting radioactive materials are handled.  Appropriate nuclides include iodine-131, iodine-125, molybdenum-99, technetium-99m, thallium-201 and phosphorous-32.

  • Where hands are required to be close to sealed radioactive sources, such as in servicing or inspection operations (including wipe testing).
    In interventional and other diagnostic radiology practices where hands may be close to primary x-ray beams.

Back to top:

Downloads

The following downloads are available:

Our Personal Dosimetry Service information booklet giving product specifications, prices and terms of trade, an explanation of our systems and how they operate, and some general information about radiation doses and putting reported personal doses into perspective.
Personal Dosimetry Service booklet (PDF - 1328 kB)

A form to assist you in giving us your details, if you wish to join our service.
PDS joining application form (PDF - 28 kB)

A form to assist you in advising us of thresholds you wish to set to take advantage of higher-than-normal dose-rate highlighting
PDS higher-than-normal dose-rate highlighting thresholds (PDF - 65 kB)

Contact us

For any queries, please contact the Personal Dosimetry Service Team.

Back to top: