Comparison of simulated and measured spectra of an industrial 450 kV X-ray tube
- 作者：A. Miceli ; R. Thierry ; M. Bettuzzi ; A. Flisch ; J. Hofmann ; U. Sennhauser ; F. Casali
- 关键词：Monte Carlo simulation ; GEANT4 ; X-ray spectrometry ; CdTe detector ; X-ray spectra ; Attenuation curves
- 刊名：Nuclear Instruments and Methods in Physics Research Section A ; Accelerators ; Spectrometers ; Detectors and Associated Equipment
- 出版年：2007
- 期刊代码：41_01689002
- 类别：ph
- 出版时间：21 September 2007
- 卷：580
- 期：1
- 页码：123-126
- 文件大小：179 K
摘要
An accurate knowledge of the X-ray source spectrum is required in order to optimize X-ray Computed Tomography systems. A simulation model based on the Monte Carlo code GEANT4 was developed to determine the X-ray spectrum generated by a 450 kV tube. The X-ray spectra were measured using a Cadmium Telluride stack detector. The measured spectra were corrected for spurious detector effects and detector efficiency. The X-ray spectra simulated by GEANT4 were validated by comparison with X-ray spectra measured at 350, 400 and 450 kV. We observed a good agreement between the simulated and the measured X-ray spectra. In addition, we simulated and measured attenuation curves using aluminium and copper filtration. The comparison of the attenuation curves shows an excellent agreement.