Meetings » 14th CTUG Meeting » Abstracts

Materials and methods employed to validate a CT scannerís approximation of effective atomic number

R Loader

Plymouth Hospitals NHS Trust (Derriford Hospital)


Rapid KVp switching Gemstone Spectral Imaging (GSI) dual energy CT, utilising material decomposition and monoenergetic extrapolation, can estimate the effective atomic number of a user defined region of interest (ROI) within a body. Materials and methods are conveyed illustrating techniques to validate the scanner determined effective atomic number for a range of materials utilising a GE HD750 series CT scanner. The basic theory behind material decomposition, the GE definition of effective atomic number, experimental validation techniques and possible clinical uses will be described for this introductory glimpse of quantitative CT.

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