Suitability of the Medipix2 readout-chip for radiological imaging

Photon Counting Chips, like the Medipix2 open the possibility of a further improvement of image quality and dose reduction for the patient in X-ray diagnostics. The aim of this paper is to demonstrate the usability of the Medipix2 readout-chip in the medical environment, especially in radiological imaging. Therefore, first measurements with a 300 μm thick Si detector in terms of homogeneity and energy calibration should be presented. The medical imaging capabilities are shown by the imaging of a of a tube phantom (three different tubes represent typical densities of the human body) with the Philips HOMX 161 X-ray source. Additionally measurements in reference to variations of the room temperature show that the Medipix2 readout-system is suitable for medical applications.