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Created page with "100px|frameless|right|link=ICRP Glossary A dimensionless factor defined to reflect the relative biological effectiveness of high-LET radiations co..."
[[File:Glossary Icon-2.png|100px|frameless|right|link=ICRP Glossary]]
A dimensionless factor defined to reflect the relative biological effectiveness of high-LET radiations compared with low-LET radiations at low exposure levels. <math>Q</math> is usually given by a function <math>Q(L)</math>, where <math>L</math> is the unrestricted LET in water. The quality factor at a point in tissue, is given by:
<math>
Q = \frac{1}{D} \int_{L=0}^\infty Q(L)D_LdL
</math>
where <math>D</math> is the [[absorbed dose]] at that point, <math>D_L</math> is the distribution of <math>D</math> in unrestricted LET <math>L</math> at the point of interest, and <math>Q(L)</math> is the quality factor as a function of <math>L</math>. The integration is to be performed over <math>D_L</math>, due to all charged particles, excluding their secondary electrons.
[[ICRP Publication 123]], 2013
'''Return to [[ICRP Glossary|Glossary]]'''
== Previous glossary entries ==
=== from [[ICRP Publication 131]], 2015 ===
A dimensionless factor defined to reflect the relative biological effectiveness of high-LET radiations compared with low-LET radiations at low exposure levels. <math>Q</math> is usually given by a function <math>Q(L)</math>, where <math>L</math> is the unrestricted LET in water. The quality factor at a point in tissue, is given by:
<math>
Q = \frac{1}{D} \int_{L=0}^\infty Q(L)D_LdL
</math>
where <math>D</math> is the [[absorbed dose]] at that point, <math>D_L</math> is the distribution of <math>D</math> in unrestricted LET <math>L</math> at the point of interest, and <math>Q(L)</math> is the quality factor as a function of <math>L</math>. The integration is to be performed over <math>D_L</math>, due to all charged particles, excluding their secondary electrons.
[[ICRP Publication 123]], 2013
'''Return to [[ICRP Glossary|Glossary]]'''
== Previous glossary entries ==
=== from [[ICRP Publication 131]], 2015 ===
