Radiation weighting factor
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The radiation weighting factor (WR) is a dimensionless constant that accounts for the relative biological effectiveness (RBE) of various types of ionising radiation.
The radiation weighting factor is used to calculate the equivalent dose (HT) by the following equation:
Absorbed dose (DT) x radiation weighting factor (WR) = equivalent dose (HT)
The International Commission on Radiological Protection (ICRP) has published the latest set of numerical values of radiation weighting factors as below (as of 2007):
- WR = 1: photons, electrons
- WR = 2: protons
- WR = 20: alpha particles, fission fragments, heavy ions
- WR = variable: neutrons (determined by complex equations)
-<p>The <strong>radiation weighting factor</strong> (<em>W<sub>R</sub></em>) is a dimensionless constant that accounts for the relative biological effectiveness (RBE) of various types of ionising radiation.</p><p>The radiation weighting factor is used to calculate the <a href="/articles/equivalent-dose">equivalent dose (<em>H<sub>T</sub></em>)</a> by the following equation:</p><p><a href="/articles/absorbed-dose">Absorbed dose (<em>D</em><sub><em>T</em></sub>)</a> x radiation weighting factor (<em>W<sub>R</sub></em>) = equivalent dose (<em>H<sub>T</sub></em>)</p><p>The International Commission on Radiological Protection (ICRP) has published the latest set of numerical values of radiation weighting factors as below:</p><ul>- +<p>The <strong>radiation weighting factor</strong> (<em>W<sub>R</sub></em>) is a dimensionless constant that accounts for the relative biological effectiveness (RBE) of various types of ionising radiation.</p><p>The radiation weighting factor is used to calculate the <a href="/articles/equivalent-dose">equivalent dose (<em>H<sub>T</sub></em>)</a> by the following equation:</p><p><a href="/articles/absorbed-dose">Absorbed dose (<em>D</em><sub><em>T</em></sub>)</a> x radiation weighting factor (<em>W<sub>R</sub></em>) = equivalent dose (<em>H<sub>T</sub></em>)</p><p>The International Commission on Radiological Protection (ICRP) has published the latest set of numerical values of radiation weighting factors as below (as of 2007):</p><ul>
References changed:
- The 2007 Recommendations of the International Commission on Radiological Protection. ICRP publication 103. Ann ICRP. 2007;37 (2-4): 1-332
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- Imaging Technology
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Radiation weighting factor
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