The purpose of this guide is to establish a uniform protocol for the placement of radiation dosimeter throughout the PET Imaging Center at the University of Iowa Hospitals and Clinics. The definitions below list each type of dosimeter along with the area it is to be worn and the significance of each reading.
Contact Laurie Scholl, VA Interim Radiation Safety Officer (158-5733 VA) with any questions or concerns.
Dosimeter Types
P1 - Whole Body dosimeter -
The P1 dosimeter provides a measurement of the deep (DDE) and shallow (SDE) radiation dose equivalent received by the whole body. A black body icon (as shown on the left) identifies the P1 whole body dosimeter. Wear this dosimeter on the torso at waist or chest level.
U3 - Ring dosimeter –
The U3 ring dosimeter provides a measurement of the extremity radiation dose equivalent received by the lower arm and hand. The U3 dosimeter is to be worn under the protective latex glove on a finger of the hand likely to receive the highest radiation exposure. A second ring dosimeter (identified as a "U4") worn on a finger of the opposite hand is recommended for individuals who routinely prepare and/or administer radiopharmacueticals or brachytherapy.
ALARA Limits
PLEASE NOTE: Wearing your dosimeters in accordance with the guidelines given below is required in order to obtain an accurate assessment of your radiation dose. When not in use, store your dosimeters in an area that will not be exposed to radiation in excess of background levels.
State of Iowa Limits
| Type of Exposure | Annual Limit |
| Whole Body Deep Dose Equivalent (DDE) which includes: head, trunk, active blood forming organs & gonads |
5000 mrem/year total |
| Whole Body Shallow Dose Equivalent (SDE) which includes: skin |
50000 mrem/year total |
| Lens of Eye Dose Equivalent (LDE) |
15000 mrem/year total |
| Extremities |
50000 mrem/year total |
| Limit for person completing pregnancy declaration |
500 mrem/gestation period |
VAMC Limits (Quarterly)
| Area of Body |
ALARA Action Level I |
ALARA Action Level II |
| Whole Body Deep Dose Equivalent (DDE) |
125-374 mrem |
> 374 mrem |
| Whole Body Shallow Dose Equivalent (SDE) |
1250-3749 mrem |
> 3749 mrem |
| Lens of Eye Dose Equivalent (LDE) |
375-1124 mrem |
> 1124 mrem |
| Extremities |
1250-3749 mrem |
> 3749 mre |