A dosimeter is a device used to measure the amount of radiation exposure to the body. It is important to wear it in the right place during fluoroscopy to ensure accurate readings. Generally, the dosimeter should be worn on the chest or abdomen, under the lead apron. A second dosimeter should be worn on the collar outside the lead apron to monitor exposure to the lens of the eye.
For fetal dosimeters, which have a monthly frequency, they should be worn at waist height under any lead garment. Lastly, ring dosimeters should be used on the hand closest to the radiation sources.It is essential that all dosimeters, whether used or not, are returned at the end of each period of use. The TLD badge and ring dosimeter should be returned to the Unit Coordinator who will then send them to the Radiation Safety Department for processing. At the end of the usage period, replacement dosimeters will be distributed through the designated badge coordinator.
Shipping containers received by unit coordinators containing monthly or quarterly radiation dosimeters are designed to be reused for returning them to the Department of Radiation Safety.The purpose of a dosimetry badge is to document occupational radiation exposure and demonstrate compliance with annual dose limits and ALARA levels. Dosimeters are required if a person is likely to receive more than 10 percent of the maximum allowable dose. It is important to return all radiation dosimeters (Genesis full-body badge or TLD rings) not only for regulatory guidelines and commitments but also for recycling chips and filter components.Radiation dosimeters must be received by the Radiation Safety Department no later than 10th of the month following the end date of use period in order for them to be returned to Mirion for processing.
