Erratum to: Radiol med DOI 10.1007/s11547-014-0393-0

In the online version of the article the following equation is incorrect:

$$ {\text{CTDI}}_{\text{w}} = 2/3\,{\text{CTDI}}_{{100,{\text{c}}}} + 2/3\,{\text{CTDI}}_{{100,{\text{p}}}} $$

The correct equation should read:

$$ {\text{CTDI}}_{\text{w}} = 1/3\,{\text{ CTDI}}_{{100,{\text{c}}}} + 2/3\,{\text{CTDI}}_{{100,{\text{p}}}} $$