Within a radiation safety program, the goal of a dosimetry service is to ensure that doses to workers and members of the public are:

  • As low as reasonably achievable (ALARA)
  • Below state and federal regulation limits 

The following table shows the dose limits for adult workers, minor workers, declared pregnant women, and members of the public. Radiation doses should be below 10% of these limits.

  Whole body dose in one year Other limits
Adult workers 5 rem

Lens: 15 rem in one year 

Skin, organ, extremities: 50 rem in one year

Minor workers 10% of adult limit 10% of adult limit
Declared pregnant women 0.5 rem fetal dose

50 millirem fetal dose in one month

Skin, lens, extremities: same as adult worker

Members of the public 0.1 rem 2 millirem in one hour

The law requires radiation dose measurements for potentially exposed workers who might exceed 10% of the occupational limit (500 millirem). Years of monitoring history demonstrate that most exposures are nondetectable. We still measure radiation doses for certain personnel to ensure that dose levels are ALARA. We also keep exposure records, as is required.

Information regarding who must wear dosimeters in the research community can be found in the Controlled Radiation Authorization (CRA) for each research area, under the Principal Investigator (PI). If your location or group in the clinic or research community receives dosimeters, you should have a dosimetry contact. This contact will help you get a dosimeter (if needed). 

If you are new to Stanford and wish to order dosimetry, or are uncertain if you need dosimetry, please complete the Radiation Dosimetry Service Request Form.

If you are a location contact for dosimetry and have an established account, you can initiate a service request online. If you need assistance, contact the Health Physics Dosimetry Coordinator.