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'''''[[ICRP Publication 103]]'' paragraphs 107, 108, and 109'''
<blockquote>In radiation biology, clinical radiology, and radiological protection the absorbed dose, D, is the basic physical dose quantity, and it is used for all types of ionising radiation and any irradiation geometry. It is defined as ... the mean energy imparted to matter ... [divided by the mass]
The SI unit of absorbed dose is J kg<sup>-1</sup> and its special name is gray (Gy) ... While it is defined at any point in matter, its value is obtained as an average over a mass ... Absorbed dose is a measurable quantity and primary standards exist to determine its value.
When using the quantity absorbed dose in practical protection applications, doses are averaged over tissue volumes. It is assumed that, for low doses, the mean value of absorbed dose averaged over a specific organ or tissue can be correlated with radiation detriment for stochastic effects in that tissue with an accuracy sufficient for the purposes of radiological protection.</blockquote>
'''''[[ICRP Publication 103]]'' paragraph 112'''
<blockquote>The protection quantities are used to specify exposure limits to ensure that the occurrence of stochastic health effects is kept below unacceptable levels and that tissue reactions are avoided. The definition of the protection quantities is based on the average absorbed dose, D<sub>T,R</sub> in the volume of a specified organ or tissue T (see Table 3), due to radiation of type R (see Table 2). The radiation R is given by the type and energy of radiation either incident on the body or emitted by radionuclides residing within it. The protection quantity equivalent dose in an organ or tissue, H<sub>T</sub>, is then defined by
[[Image:Page5F1.jpg |160px]]
where wR is the radiation weighting factor for radiation R. The sum is performed over all types of radiations involved. The unit of equivalent dose is J kg<sup>-1</sup> and has the special name sievert (Sv).</blockquote>
'''''[[ICRP Publication 103]]'' Table 2'''
<blockquote>[[Image:Pub103T2.jpg |300px]]
[[Image:Pub103F1.jpg |300px]]</blockquote>
===[[ICRP Publication 103]] paragraph 101===
<blockquote> ... The development of ... effective dose has made a significant contribution to radiological protection as it has enabled doses to be summed from whole and partial body exposure from external radiation of various types and from intakes of radionuclides.</blockquote>
'''''[[ICRP Publication 103]]'' paragraph 125'''
<blockquote>The effective dose, E, ... is defined by a weighted sum of tissue equivalent doses as:
[[Image:Page5F2.jpg |225px]]
where w<sub>T</sub> is the tissue weighting factor for tissue T and Σw<sub>T</sub> = 1. The sum is performed over all organs and tissues of the human body considered to be sensitive to the induction of stochastic effects. These w<sub>T</sub> values are chosen to represent the contributions of individual organs and tissues to overall radiation detriment from stochastic effects. The unit of effective dose is J kg<sup>-1</sup> with the special name sievert (Sv). The unit is the same for equivalent dose and effective dose ... Care must be taken to ensure that the quantity being used is clearly stated.</blockquote>
===[[ICRP Publication 103]] Table 3===
<blockquote>[[Image:Pub103T3.jpg |300px]]</blockquote>
==Module Two:==
