Target tissue
Organs or tissues in the body for which tissue weighting factors are assigned in the effective dose. In many cases, each target tissue T corresponds to a single target region rT. In the case of the extrathoracic airways, thoracic airways, colon, and lymphatic nodes, however, a fractional weighting of more than one target region rT defines the target tissue T. (adapted from ICRP Publication 130, 2015)
ICRP Glossary entry - May 2019
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