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Proceedings Paper

CTDIvol: a suitable normalization for CT dose conversion coefficients at different tube voltages?
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Paper Abstract

Reliable estimates for patient doses for CT examinations are desirable for the patients themselves as well as for new epidemiological studies. It has been shown that dose conversion coefficients normalized to CTDIvol provide rather scanner independent quantities. In this work, it is demonstrated that this normalization provides also tube voltage independent values by simulating axial CT scans of a seven-year old infant and an adult. The differences in the effective dose conversion coefficients per CTDIvol between 80 and 120 kV is for most body heights below 5%. Only at the height of the testes and the thyroid the difference can be as large as 15%. This results in differences of the effective dose conversion coefficient per CTDIvol between 80 and 120 kV of less than 6-7% for typical CT examinations.

Paper Details

Date Published: 3 March 2012
PDF: 6 pages
Proc. SPIE 8313, Medical Imaging 2012: Physics of Medical Imaging, 83131P (3 March 2012); doi: 10.1117/12.910905
Show Author Affiliations
Helmut Schlattl, Helmholtz Zentrum München GmbH (Germany)
Maria Zankl, Helmholtz Zentrum München GmbH (Germany)
Christoph Hoeschen, Helmholtz Zentrum München GmbH (Germany)

Published in SPIE Proceedings Vol. 8313:
Medical Imaging 2012: Physics of Medical Imaging
Norbert J. Pelc; Robert M. Nishikawa; Bruce R. Whiting, Editor(s)

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