Notes

• NOTE 1 The personal dose equivalent, and ICRU quantity, is normally represented by Hp(d) for strongly penetrating radiation at a depth d in millimetres that is appropriate for strongly penetrating radiation A reference depth of 10 mm is usually used. It varies both as a function of individuals and location and is appropriate for organs and tissues deeply situated in the body.
• NOTE 2 It is normally represented by Hs(d) for weakly penetrating radiation (superficial) at a depth d in millimetres that is appropriate for weakly penetrating radiation. A reference depth of 0,07 mm is usually used. It varies both as a function of individuals and location and is appropriate for superficial organs and tissues which are going to be irradiated by both weakly and strongly penetrating radiation.