Material decomposition utilizing dual energy computed tomography

0450483 - ÚTAM 2016 RIV DE eng O - Ostatní výsledky
Vavřík, Daniel - Jakůbek, J. - Pichotka, M. - Kumpová, Ivana
Material decomposition utilizing dual energy computed tomography.
2015. Digital Industrial Radiology and Computed Tomography (DIR 2015). Bad Breisig: The Web's Largest Open Access Database of Nondestructive Testing (NDT), 2015. ISSN 1435-4934
Grant CEP: GA MŠMT(CZ) LO1219
Grant ostatní: Evropská komise(XE) QUICOM FP7/2007-2013
Klíčová slova: dual energy computed tomography (DECT) * carbon fibre reinforced composites * X-ray spectra
Kód oboru RIV: AL - Umění, architektura, kulturní dědictví
http://www.ndt.net/events/DIR2015/app/content/Poster/80_Vavrik.pdf

Generally, inspection of the carbon fibre reinforced composites with metal components is embraced due to significantly different attenuation coefficients of a metal and CFRP components. At least two snapshots have to be taken with different X ray spectra for each CT projection to be able separate material components and/or to reduce so called metal artifacts. Related so called dual energy CT (DECT) method can be generally based on two principles: Utilizing two different X ray tube spectra with significantly different X-ray tube potentials and X-ray beam filters, not special requirementsfor X-ray detector; Splitting of the X-ray spectra into two (or more) bands utilizing energy thresholds which are set on the detector side (it supposes that detector has this ability as WidePix has). X-ray tube spectra can be shaped by the tube voltage and/or by X-ray beam filtering.
Trvalý link: http://hdl.handle.net/11104/0251777