%0 Journal Article
%A Hünemohr, Nora
%A Krauss, Bernhard
%A Tremmel, Christoph
%A Ackermann, Benjamin
%A Jäkel, Oliver
%A Greilich, Steffen
%T Experimental verification of ion stopping power prediction from dual energy CT data in tissue surrogates.
%J Physics in medicine and biology
%V 59
%N 1
%@ 1361-6560
%C Bristol
%I IOP Publ.
%M DKFZ-2017-02095
%P 83 - 96
%D 2014
%X We present an experimental verification of stopping-power-ratio (SPR) prediction from dual energy CT (DECT) with potential use for dose planning in proton and ion therapy. The approach is based on DECT images converted to electron density relative to water ϱe/ϱe, w and effective atomic number Zeff. To establish a parameterization of the I-value by Zeff, 71 tabulated tissue compositions were used. For the experimental assessment of the method we scanned 20 materials (tissue surrogates, polymers, aluminum, titanium) at 80/140Sn kVp and 100/140Sn kVp (Sn: additional tin filtration) and computed the ϱe/ϱe, w and Zeff with a purely image based algorithm. Thereby, we found that ϱe/ϱe, w (Zeff) could be determined with an accuracy of 0.4
%K Polymethyl Methacrylate (NLM Chemicals)
%K Aluminum (NLM Chemicals)
%K Titanium (NLM Chemicals)
%F PUB:(DE-HGF)16
%9 Journal Article
%$ pmid:24334601
%R 10.1088/0031-9155/59/1/83
%U https://inrepo02.dkfz.de/record/125980