Changes

[[Absorbed dose]], <math>D</math>, averaged over an organ or tissue region, <math>T</math>, as:

The mean [[absorbed dose ]] <math>D_T</math> to a target organ or tissue <math>T</math> is the sum of the contributions, <math>D(T \leftarrow S)</math>, arising from nuclear transformations of the radionuclide in various source organs <math>S</math>, i.e.:

The mean [[absorbed dose ]] in a specified organ or tissue region <math>r_T</math> is given by:

where <math>m_T</math> is the mass of the organ or tissue and <math>D</math> is the [[absorbed dose ]] in the mass element <math>dm</math>. The SI unit of mean [[absorbed dose ]] is joule per kilogramme (J kg^-1) and its special name is [[gray]] (Gy). The mean [[absorbed dose ]] in an organ is sometimes termed organ dose. === from [[ICRP Publication 139]], 2007 === The [[absorbed dose]] <math>D_T</math> averaged over the tissue or organ <math>T</math> which is given by: <math>D_T=\frac{\epsilon_T}{m_T}</math> Where <math>\epsilon_T</math> is the mean total energy imparted in a tissue or organ <math>T</math>, and <math>m_T</math> is the mass of that tissue or organ.