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In mammography D<sub>G</sub> is the mean absorbed dose in the glandular tissue of the breast. Glandular tissue is the radiosensitive tissue of the breast. D<sub>G</sub> is calculated from either the incident air kerma (K<sub>a,i</sub>) or the entrance-surface air kerma (K<sub>a,e</sub>) used for the specific mammography examination. The conversion from K<sub>a,i</sub> to D<sub>G</sub> is a function of beam quality (i.e. half value layer), anode material, filtration, breast thickness, and breast composition. The conversion from K<sub>a,e</sub> to D<sub>G</sub> is a function of all these factors as well as adjustment for the backscatter factor from breast tissue. D<sub>G</sub> is also called ‘average glandular dose’ (AGD) (measured in mGy).
([[ICRP Publication 135]], 2017)
'''Return to [[ICRP Glossary|Glossary]]'''
In mammography D<sub>G</sub> is the mean absorbed dose in the glandular tissue of the breast. Glandular tissue is the radiosensitive tissue of the breast. D<sub>G</sub> is calculated from either the incident air kerma (K<sub>a,i</sub>) or the entrance-surface air kerma (K<sub>a,e</sub>) used for the specific mammography examination. The conversion from K<sub>a,i</sub> to D<sub>G</sub> is a function of beam quality (i.e. half value layer), anode material, filtration, breast thickness, and breast composition. The conversion from K<sub>a,e</sub> to D<sub>G</sub> is a function of all these factors as well as adjustment for the backscatter factor from breast tissue. D<sub>G</sub> is also called ‘average glandular dose’ (AGD) (measured in mGy).
([[ICRP Publication 135]], 2017)
'''Return to [[ICRP Glossary|Glossary]]'''