共 2 条
X-ray energy selected imaging with Medipix II
被引：8
作者：
Ludwig, J
Zwerger, A
Benz, KW
Fiederle, M
Braml, H
Fauler, A
Konrath, JP
机构：
[1] Univ Freiburg, Inst Phys, D-79104 Freiburg, Germany
[2] Univ Freiburg, Freiburger Mat Forschungszentrum, D-79104 Freiburg, Germany
[3] Univ Erlangen Nurnberg, Inst Phys, D-91058 Erlangen, Germany
来源：
关键词：
semiconductors;
photon counting;
dental diagnosis;
D O I：
10.1016/j.nima.2004.06.007
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 [仪器科学与技术];
080401 [精密仪器及机械];
081102 [检测技术与自动化装置];
摘要：
Two different X-ray tube accelerating voltages (60 and 70 kV) are used for diagnosis of front teeth and molars. Different energy ranges are necessary as function of tooth thickness to obtain similar contrast for imaging. This technique drives the costs for the X-ray tube up and allows for just two optimized settings. Energy range selection for the detection of the penetrating X-rays would overcome these severe setbacks. The single photon counting chip MEDIPIX2 http://www.cern.ch/medipix exhibits exactly this feature. First simulations and measurements have been carried out using a dental X-ray source. As a demonstrator a real tooth has been used with different cavities and filling materials. Simulations showed in general larger improvements as compared to measurements regarding SNR and contrast: A beneficial factor of 4% wrt SNR and 25% for contrast, measurements showed factors of 2.5 and up to 10%, respectively. (C) 2004 Elsevier B.V. All rights reserved.
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页码：209 / 214
页数：6
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