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Energy resolving CT systems using Medipix2 and MHSP detectors

 
: Carramate, L.F.N.D.; Nachtrab, F.; Firsching, M.; Silva, A.L.M.; Silva, A.M. da; Veloso, J.F.C.A.; Uhlmann, N.

:
Postprint (2.6 MByte; PDF; )

Journal of Instrumentation 8 (2013), Art. C03022, 12 pp.
ISSN: 1748-0221
International Workshop on Radiation Imaging Detectors (IWORID) <14, 2012, Figueira da Foz>
English
Conference Paper, Journal Article, Electronic Publication
Fraunhofer IIS ()

Abstract
Energy resolved imaging has been possible with a newest generation of radiation detectors with photon counting and spectroscopic capabilities. This innovation gives the possibility to enhance the image quality by applying techniques using the energy information. In this work two X-ray Computed Tomography (CT) Systems were assembled with two different energy resolving detectors: Medipix2 and MicroHole & Strip Plate (MHSP). These detectors have the aforesaid characteristics and showed a good performance for X-ray imaging. The Energy Weighting Technique (EWT) and BasisMaterial Decomposition (BMD) techniques were applied with good results. An improvement of 31% in the CNR was achieved by applying the EWT in the MHSP data and, using Medipix2, two basis materials (Carbon based and Aluminium) were decomposed successfully with densities close to the real values.

: http://publica.fraunhofer.de/documents/N-241883.html