Glossary of Radiological Terminology (T)

GLOSSARY OF
RADIOLOGICAL TERMINOLOGY

TERRESTRIAL RADIATION The portion of the natural radiation (background radiation) that is emitted by naturally occurring radioactive materials in the earth.
THERMOLUMINESCENT DOSIMETER (TLD) Crystalline materials that emit light if they are heated after they have been exposed to radiation.
TOTAL EFFECTIVE DOSE EQUIVALENT (TEDE) The sum of the deep dose equivalent (for external exposures) and the committed effective dose equivalent (for internal exposures).
TRITIUM (H-3) A radioactive isotope of hydrogen. Because it is chemically identical to natural hydrogen, tritium can easily be taken into the body by ingestion or inhalation pathways. Tritium is a 100% pure beta emitter with a radioactive half-life of 12.5 years.

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TERRESTRIAL RADIATION	The portion of the natural radiation (background radiation) that is emitted by naturally occurring radioactive materials in the earth.
THERMOLUMINESCENT DOSIMETER (TLD)	Crystalline materials that emit light if they are heated after they have been exposed to radiation.
TOTAL EFFECTIVE DOSE EQUIVALENT (TEDE)	The sum of the deep dose equivalent (for external exposures) and the committed effective dose equivalent (for internal exposures).
TRITIUM (H-3)	A radioactive isotope of hydrogen. Because it is chemically identical to natural hydrogen, tritium can easily be taken into the body by ingestion or inhalation pathways. Tritium is a 100% pure beta emitter with a radioactive half-life of 12.5 years.