Editing Sievert (section)

===Directional dose equivalent===
This is used for monitoring of low penetrating radiation and is usually expressed as the quantity ''H'''(0.07). This means the radiation is equivalent to that found at a depth of 0.07&nbsp;mm in the ICRU sphere phantom.<ref>ICRP report 103 paragraphs B165- B167</ref> Examples of low penetrating radiation are alpha particles, beta particles and low-energy photons. This dose quantity is used for the determination of equivalent dose to such as the skin, lens of the eye.<ref>{{citation |last1=Mattsson |first1=Sören |last2=Söderberg |first2=Marcus |title=Radiation Protection in Nuclear Medicine |chapter=Dose Quantities and Units for Radiation Protection |chapter-url=https://www.springer.com/cda/content/document/cda_downloaddocument/9783642311666-c2.pdf |publisher=Springer Verlag |year=2013 |doi=10.1007/978-3-642-31167-3 |isbn=978-3-642-31166-6}}</ref> In radiological protection practice value of omega is usually not specified as the dose is usually at a maximum at the point of interest.