Publikace na 1. lékařská fakulta |
2012
Abstrakt
Systematical measurement and optimization of the image contrast in the terms of the signal to noise ratio (SNR) reached by two detector systems Medipix2 (Si sensor) and Flat Panel(Scintillator + CMOS) is the aim of this work. The measurement is carried out with micro-focusX-ray source and aluminum step phantom specimen of various thicknesses.
The SNR is computedfrom measured image data for various combination of aluminum thicknesses and in dependenceon tube voltage and acquisition time. On the basis of the results, the comparison of two detectorsystems is done and the illustrative SNR optimization process for a hypothetical and real samplesis demonstrated