Contrast optimization in X-ray radiography with single photon counting imagers of Medipix type

0385293 - ÚTAM 2013 RIV GB eng J - Journal Article
Jandejsek, Ivan - Dammer, J. - Jakůbek, J. - Vavřík, Daniel - Žemlička, J.
Contrast optimization in X-ray radiography with single photon counting imagers of Medipix type.
Journal of Instrumentation. Roč. 7, C12011 (2012), s. 1-5. ISSN 1748-0221. E-ISSN 1748-0221.
[International Workshop on Radiation Imaging Detectors /14./. Figueira da Foz, Coimbra, 01.07.2012-05.07.2012]
R&D Projects: GA ČR GAP105/11/1551
Grant - others:GA MKO(CZ) DF12P01OVV048
Institutional support: RVO:68378297
Keywords : X-ray detectors * X-ray radiography and digital radiography * inspection with x-rays
Subject RIV: JB - Sensors, Measurment, Regulation
Impact factor: 1.656, year: 2012
http://iopscience.iop.org/1748-0221/7/12/C12011/

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 and CMOS) is the aim of this work. The measurement is carried out with micro-focus X-ray source and aluminum step phantom specimen of various thicknesses. The SNR is computed from measured image data for various combination of aluminum thicknesses and in dependence on tube voltage and acquisition time. On the basis of the results, the comparison of two detector systems is done and the illustrative SNR optimization process for a hypothetical and real samples is demonstrated.
Permanent Link: http://hdl.handle.net/11104/0007355