Energy-Resolving Photon-Counting Detectors in CT Based Explosive Detection Systems (EDS)

被引：0

作者：

Skatter, Sondre ^{[1
]}

Olesinski, Stephan ^{[2
]}

机构：

[1] Morpho Detect LLC, Newark, CA USA

[2] Morpho Detect Germany GmbH, Hamburg, Germany

来源：

2014 INTERNATIONAL CARNAHAN CONFERENCE ON SECURITY TECHNOLOGY (ICCST) | 2014年

关键词：

X-rays; dual energy; material discrimination; photon counting detectors; TOMOGRAPHY;

D O I：

暂无

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

We evaluated a data set consisting of 38 different materials - threats and non-threats - to determine whether there are signatures detectable in CT systems equipped with energyresolving photon-counting detectors that would help the detection task. Data with such detectors was collected in a lab setup using a Compton spectrometer and simple transmission measurements through samples of known material and thickness. Two alternative decomposition methods, SVD and NNMF, were evaluated and found to produce equivalent model predictions as a physics-based model. Furthermore, all three methods performed equally well with respect to material discrimination, which was evaluated by Kullback-Leibler divergence. No additional material signatures, beyond electron density and effective atomic number, appeared to be extractable from the attenuation spectra.

引用

页数：6