Microdosimetric characterisation of 28 kV(p) Mo/Mo, Rh/Rh, Rh/Al, W/Rh and Mo/Rh mammography X ray spectra
Date
2002ICR Author
Author
Verhaegen, F
Castellano, IA
Type
Journal Article
Metadata
Show full item recordAbstract
Microdosimetric characteristics of 28 kV(p), mammography X ray spectra were studied for several target/added filtration combinations (Mo/Mo, Rh/Rh, Rh/Al, W/Rh, Mo/Rh). Monte Carlo techniques were used to model X ray production from mammography units and to calculate distributions of absorbed dose and energy imparted in breast tissue The results show that the dose averaged lineal energy is about 5.0 keV.mum(-1). about 25% higher than for general diagnostic imaging X ray spectra. Significant differences in lineal energy between the five X ray qualities were noted, with the highest value for the commonly used Mo/Mo combination, Spectral hardening with depth in the tissues causes a 5% decrease in lineal energy over 5 cm. No significant differences ere found for the different (issue compositions.
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Language
eng
License start date
2002
Citation
RADIATION PROTECTION DOSIMETRY, 2002, 99 pp. 393 - 396
Publisher
NUCLEAR TECHNOLOGY PUBL