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Proceedings Paper

K-edge subtraction imaging using a pixellated energy-resolving detector
Author(s): Silvia Pani; Sarene C. Saifuddin; Christiana Christodoulou; Matthew Veale; Paul Seller; Robert D. Speller; Matthew Wilson; James W. Scuffham
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Paper 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.

Paper Details

Date Published: 16 March 2011
PDF: 8 pages
Proc. SPIE 7961, Medical Imaging 2011: Physics of Medical Imaging, 79614C (16 March 2011); doi: 10.1117/12.876577
Show Author Affiliations
Silvia Pani, Univ. of Surrey (United Kingdom)
Sarene C. Saifuddin, Univ. of Surrey (United Kingdom)
Christiana Christodoulou, Univ. College London (United Kingdom)
Matthew Veale, Rutherford Appleton Lab. (United Kingdom)
Paul Seller, Rutherford Appleton Lab. (United Kingdom)
Robert D. Speller, Univ. College London (United Kingdom)
Matthew Wilson, Rutherford Appleton Lab. (United Kingdom)
James W. Scuffham, Univ. of Surrey (United Kingdom)
Royal Surrey County Hospital NHS Foundation Trust (United Kingdom)

Published in SPIE Proceedings Vol. 7961:
Medical Imaging 2011: Physics of Medical Imaging
Norbert J. Pelc; Ehsan Samei; Robert M. Nishikawa, Editor(s)

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