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2011 Nuclear Science Symposium and Medical Imaging Conference, Valence : Espagne (2011)
Comparison of K-Edge Versus Standard Absorption Imaging Using the XPAD3 Hybrid Pixel Detector
F. Cassol Brunner1, C. Kronland-Martinet1, A. Bonissent1, Y. Boursier1, J.-C. Clemens1, M. Dupont1, H. Ouamara1, F. Debarbieux2, C. Morel1

Hybrid pixel detectors represent a new generation of digital X-ray detectors for which photon counting replaces charge integration as used within standard digital radiography systems. This novel approach involves several advantages, among which the absence of dark noise and the ability to set an energy threshold for the detected photons are of uppermost importance for the development of new X-ray imaging approaches that will exploit spectral information on the detected X-rays. We investigate the capability to perform K-edge imaging by using the newly developed XPAD3 hybrid pixel detector with 500 kpixels of 130 x 130 μm2. After proper pixel calibration, K-edge imaging is obtained by changing the pixel threshold around the K-shell binding energy of selected contrast agents. K-edge tomography of silver and iodine is compared with standard X-ray absorption CT and further investigated with Monte Carlo simulation
1 :  CPPM - Centre de Physique des Particules de Marseille
2 :  IBDML - Institut de Biologie du Développement de Marseille Luminy
Sciences du Vivant/Ingénierie biomédicale