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Open Access 01-04-2011 | Review

Dual- and multi-energy CT: approach to functional imaging

Authors: Juergen Fornaro, Sebastian Leschka, Dennis Hibbeln, Anthony Butler, Nigel Anderson, Gregor Pache, Hans Scheffel, Simon Wildermuth, Hatem Alkadhi, Paul Stolzmann

Published in: Insights into Imaging | Issue 2/2011

Abstract

The energy spectrum of X-ray photons after passage through an absorber contains information about its elemental composition. Thus, tissue characterisation becomes feasible provided that absorption characteristics can be measured or differentiated. Dual-energy CT uses two X-ray spectra enabling material differentiation by analysing material-dependent photo-electric and Compton effects. Elemental concentrations can thereby be determined using three-material decomposition algorithms. In comparison to dual-energy CT used in clinical practice, recently developed energy-sensitive photon-counting detectors sample the material-specific attenuation curves at multiple energy levels and within narrow energy bands; the latter allows the detection of element-specific, k-edge discontinuities of the photo-electric cross section. Multi-energy CT imaging therefore is able to concurrently identify multiple materials with increased accuracy. These specific data on material distribution provide information beyond morphological CT, and approach functional imaging. This article reviews the principles of dual- and multi-energy CT imaging, hardware approaches and clinical applications.

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Title: Dual- and multi-energy CT: approach to functional imaging
Authors: Juergen Fornaro
Sebastian Leschka
Dennis Hibbeln
Anthony Butler
Nigel Anderson
Gregor Pache
Hans Scheffel
Simon Wildermuth
Hatem Alkadhi
Paul Stolzmann
Publication date: 01-04-2011
Publisher: Springer Berlin Heidelberg
Published in: Insights into Imaging / Issue 2/2011
Electronic ISSN: 1869-4101
DOI: https://doi.org/10.1007/s13244-010-0057-0

Keynote webinar | Spotlight on sleep in brain health

Springer Medicine

Dual- and multi-energy CT: approach to functional imaging

Abstract

Keynote webinar | Spotlight on sleep in brain health

Springer Medicine

Abstract

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