K-edge subtraction imaging using a pixellated energy-resolving detector

Silvia Pani; Sarene C. Saifuddin; Christiana Christodoulou; Matthew Veale; Paul Seller; Robert D. Speller; Matthew Wilson; James W. Scuffham

doi:10.1117/12.876577

16 March 2011 K-edge subtraction imaging using a pixellated energy-resolving detector

Silvia Pani, Sarene C. Saifuddin, Christiana Christodoulou, Matthew Veale, Paul Seller, Robert D. Speller, Matthew Wilson, James W. Scuffham

Author Affiliations +

Proceedings Volume 7961, Medical Imaging 2011: Physics of Medical Imaging; 79614C (2011) https://doi.org/10.1117/12.876577
Event: SPIE Medical Imaging, 2011, Lake Buena Vista (Orlando), Florida, United States

Abstract

This paper presents preliminary work aimed at assessing the feasibility of K-edge subtraction imaging using the spectroscopic information provided by a pixellated energy-resolving Cadmium Zinc Telluride detector, having an active area of 20×20 pixels 250 μm in size. Images of a test object containing different amounts of Iodine-based contrast agent were formed above and below the K-edge of Iodine (33.2 keV) by integrating, pixel by pixel, different windows of the spectrum. The results show that the optimum integration window for details 1-2 mm in diameter is between 2 keV and 5 keV. Concentrations of down to 50 μg Iodine/ml were detected in a 1-mm diameter tube with an entrance dose of 100 μGy.

Citation Download Citation

Silvia Pani, Sarene C. Saifuddin, Christiana Christodoulou, Matthew Veale, Paul Seller, Robert D. Speller, Matthew Wilson, and James W. Scuffham "K-edge subtraction imaging using a pixellated energy-resolving detector", Proc. SPIE 7961, Medical Imaging 2011: Physics of Medical Imaging, 79614C (16 March 2011); https://doi.org/10.1117/12.876577

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