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Radiation Dosimeters

Radiation Monitoring Dosimeters (Radiation Dosimeters)

Employees, if part of their duties cause them to be potentially exposed to ionizing radiation in excess of 10% of the yearly maximum permissible dose, are required to wear radiation monitoring dosimeters (radiation dosimeters) to record their radiation exposure.  If an employee is involved with diagnostic or therapeutic administration of radioactive iodine in excess of applicable quantities, then they are required to monitored for internal radiation exposure.

If a personal radiation monitoring badge is issued to an individual, then that individual must wear the radiation dosimeter at all times when working with or near a source of ionizing radiation.  Failure to wear the dosimeter and return it for exchange puts the individual and Stony Brook University in non-compliance with New York State regulations. 

Dosimeters are changed on a monthly or quarterly basis depending upon the status of the department.  Dose reports are reviewed by Radiation Safety. If an individual receives a radiation exposure during a monitoring period that that exceeds ALARA 1 or ALARA 2 levels, then the RSO or designee will notify the individual and perform an investigation to determine the source and reason for the exposure.  

Individuals are advised to review their dose reports to monitor any exposure they may have received. You may view your own dose report at any time by time logging into the Landauer website using instructions on the link below.  If you are unable to view your report on line, you can request your dose report be provided to you by Radiation Safety.

Click here to request your dose report from RPS

Click here for instructions to view your dose report on Landauer webpage

Click here to order a new radiation badge

Click here to delete or transfer a radiation badge

Click here to report a lost radiation badge


Radiation Dosimeter Instructions

As a badged radiation worker at Stony Brook University, please pay attention to how you are wearing your radiation dosimeter.  An accurate record of your radiation exposure is dependent upon wearing your radiation dosimeter properly and exchanging them in a timely manner.

Click here for a pictoral view of how to properly wear dosimetry

Points to Remember:

  1. Timely exchange of dosimeters at each new cycle with your departmental dosimetry coordinator.
  2. Wear your issued radiation dosimeters whenever working in the vicinity of radiation.
  3. Wear your dosimeters according to the type issued;

Chest Dosimeter (Whole Body Dosimeter):

  • Without lead protective garment:  Wear between shoulders and waist
  • With lead protective garment:  Wear underneath lead garment between shoulders and waist. 

Collar Dosimeter:  Worn on outside of lead thyroid shield. 

Whole Body and Collar Dosimeters Simultaneously:  Whole body badge worn underneath lead protective garment between shoulders and waist.  Collar badge worn on outside of lead thyroid shield.

Fetal Dosimeter: 

  • If worn without lead protective garment:  Wear low in center of abdomen.
  • If worn with lead proactive garment:  Wear low in center of abdomen, underneath lead protective garment.

Ring Dosimeter:  Worn on dominant hand with white portion facing inward and always remember to wear underneath protective gloves. 

How to quickly tell where you should wear your radiation dosimeter(s):

Simply look at the rear of the dosimeter.  The wear location will be indicated beneath the account/series number:

badge instrcution