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Radiation Protection Dosimetry Advance Access published online on April 16, 2008
Radiation Protection Dosimetry, doi:10.1093/rpd/ncn073
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© The Author 2008. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org

RADIATION DOSE FROM A LINEAR SLIT SCANNING X-RAY MACHINE WITH FULL-BODY IMAGING CAPABILITIES

B. J. Irving1,*, G. J. Maree2, E. R. Hering2 and T. S. Douglas1

1 Department of Human Biology, MRC/UCT Medical Imaging Research Unit, University of Cape Town, Cape Town, 7925, South Africa
2 Division of Medical Physics, Groote Schuur Hospital and University of Cape Town, Cape Town, 7925 South Africa

* Corresponding author: Benjamin.Irving{at}uct.ac.za

Received July 9, 2007, amended January 31, 2008, accepted February 21, 2008

Doses for a range of examinations and views using digital X-ray equipment with full-body linear slit scanning capabilities (Statscan) have been compared with those from other published studies. Entrance doses (free-in-air) were measured using a dosimeter, and effective doses were generated using a Monte Carlo simulator. Doses delivered by the linear slit scanning system were significantly lower than those from conventional X-ray equipment. Effective doses were between 9 and 75% of the United Nations Scientific Committee Report on the Effects of Ionising Radiation doses for standard examinations. This dose reduction can be explained by the properties of linear slit scanning technology, including low scatter, beam geometry, the use of a digital detector and the use of higher than usual tube voltages.


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