کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1876366 | 1042004 | 2012 | 11 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: A feasibility study on gamma-ray tomography by Monte Carlo simulation for development of portable tomographic system A feasibility study on gamma-ray tomography by Monte Carlo simulation for development of portable tomographic system](/preview/png/1876366.png)
The electron beam X-ray tomographic scanner has been used in industrial and medical field since it was developed two decades ago. However, X-ray electron beam tomography has remained as indoor equipment because of its bulky hardware of X-ray generation devices. By replacing X-ray devices of electron beam CT with a gamma-ray source, a tomographic system can be a portable device. This paper introduces analysis and simulation results on industrial gamma-ray tomographic system with scanning geometry similar to electron beam CT. The gamma-ray tomographic system is introduced through the geometrical layout and analysis on non-uniformly distributed problem. The proposed system adopts clamp-on type device to actualize portable industrial system. MCNPx is used to generate virtual experimental data. Pulse height spectra from F8 tally of MCNPx are obtained for single channel counting data of photo-peak and gross counting. Photo-peak and gross counting data are reconstructed for the cross-sectional image of simulation phantoms by ART, Total Variation algorithm and ML-EM. Image reconstruction results from Monte Carlo simulation show that the proposed tomographic system can provide the image solution for industrial objects. Those results provide the preliminary data for the tomographic scanner, which will be developed in future work.
► We carried out feasibility study on gamma-ray tomography with electron beam CT scanning geometry.
► Gamma ray tomographic system is introduced through geometrical layout and analysis on non-uniformly distributed problem.
► We carried out MCNPx simulation for proposed geometry.
► Results show that this system can be used for transportable tomographic system.
Journal: Applied Radiation and Isotopes - Volume 70, Issue 2, February 2012, Pages 404–414