Share Email Print

Proceedings Paper

A research prototype system for quantum-counting clinical CT
Author(s): S. Kappler; F. Glasser; S. Janssen; E. Kraft; M. Reinwand
Format Member Price Non-Member Price
PDF $17.00 $21.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

Recent publications emphasize the benefits of quantum-counting applied to the field of Computed Tomography (CT). We present a research prototype scanner with a CdTe-based quantum-counting detector and 20 cm field-of-view (FOV). As of today there is no direct converter material on the market able to operate reliably in the harsh high-flux regime of clinical CT scanners. Nevertheless, we investigate the CT imaging performance that could be expected with high-flux capable material. Therefore we chose pixel sizes of 0.05 mm2, a good compromise between high-flux counting ability and energy resolution. Every pixel is equipped with two energy threshold counters, enabling contrast-optimization and dual-energy scans. We present a first quantitative analysis of contrast measurements, in which we limit ourselves to a low-flux scenario. Using an Iodine-based contrast agent, we find 17% contrast enhancement at 120 kVp, compared to energy-integrating CT. In addition, the general dual-energy capability was confirmed in first measurements. We conclude our work by demonstrating good agreement of measurement results and detailed CT-system simulations.

Paper Details

Date Published: 22 March 2010
PDF: 6 pages
Proc. SPIE 7622, Medical Imaging 2010: Physics of Medical Imaging, 76221Z (22 March 2010); doi: 10.1117/12.844238
Show Author Affiliations
S. Kappler, Siemens AG (Germany)
F. Glasser, CEA-LETI MINATEC (France)
S. Janssen, Siemens AG (Germany)
E. Kraft, Siemens AG (Germany)
M. Reinwand, Siemens AG (Germany)

Published in SPIE Proceedings Vol. 7622:
Medical Imaging 2010: Physics of Medical Imaging
Ehsan Samei; Norbert J. Pelc, Editor(s)

© SPIE. Terms of Use
Back to Top