Extremity Dosimeters - DOE-HDBK-1109-97

DOE-HDBK-1109-97

Radiological Safety Training for Radiation-Producing (X-Ray) Devices

Instructor's Guide

Lesson Plan

Instructor's Notes

mrem and are used to determine the dose of record.

However, they must be sent to a processor to be

read. Therefore, the exposed individual may not be

aware of his exposure until the results have been

reported (typically 1 day - several weeks).

There are several precautions that are important in

the use of dosimeters. Dosimeters should be worn

in a location that will record a dose representative

of the trunk of the body. Standard practice is to

wear a dosimeter between the neck and the waist,

but in specific situations such as nonuniform

radiation fields, special considerations may apply.

Some dosimeters have a required orientation with a

specific side facing out.

(Insert facility-specific information on dosimetry, as

appropriate.)

ii. Extremity Dosimeters.

Finger-ring and wrist dosimeters may be used to

assess radiation dose to the hands.

(Insert facility-specific information on dosimetry, as

appropriate.)

iii. Pocket Dosimeters.

Pocket ionization chambers, such as pencil

dosimeters or electronic dosimeters, are used in

radiological work. In contrast to TLDs, they give

an immediate readout of the radiation dose. Pencil