18 March 2015 Dose and image quality measurements for contrast-enhanced dual energy mammography systems
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Abstract
The results of patient dose surveys of two contrast-enhanced dual energy mammography systems are presented, showing mean glandular doses for both low and high energy components of the exposures. For one system the distribution of doses is of an unusual pattern, very different from that normally measured in patient dose surveys. The contribution of the high energy component of the exposure to the total is shown to be about 20% of that of the low energy component for this system. It is about 33% for the other system, for which the distribution of doses is similar to previously published surveys . A phantom containing disks with a range of different iodine content was used, with tissue-equivalent materials, to investigate the properties of one dual energy system. The iodine signal difference to noise ratio is suggested as a measure of image quality. It was found to remain practically constant as phantom thickness was varied, and increased only slowly (with a power relationship) as air kerma increased. Other measurements showed good reproducibility of the iodine signal difference, and that it was proportional to iodine concentration in the phantom. The iodine signal difference was found to be practically the same for a wide range of phantom thickness and glandularity.
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J. M. Oduko, J. M. Oduko, P. Homolka, P. Homolka, V. Jones, V. Jones, D. Whitwam, D. Whitwam, } "Dose and image quality measurements for contrast-enhanced dual energy mammography systems", Proc. SPIE 9412, Medical Imaging 2015: Physics of Medical Imaging, 94125I (18 March 2015); doi: 10.1117/12.2082517; https://doi.org/10.1117/12.2082517
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