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 r_T. In the case of the extrathoracic airways, thoracic airways, colon, and lymphatic nodes, however, a fractional weighting of more than one target region r_T defines the target tissue T. (adapted from ICRP Publication 130, 2015)

ICRP Glossary entry - May 2019