设计了一种新型X射线发生器电源,应用高频开关电源技术、高压倍压整流技术与单片机控制技术,成功研制出一台额定电压160 k V,管电流0.4 m A^1.2 m A的用于安检设备的X射线发生器。介绍了X射线发生器的应用场合、工作原理、主要设计思想...设计了一种新型X射线发生器电源,应用高频开关电源技术、高压倍压整流技术与单片机控制技术,成功研制出一台额定电压160 k V,管电流0.4 m A^1.2 m A的用于安检设备的X射线发生器。介绍了X射线发生器的应用场合、工作原理、主要设计思想及国内外研究现状;详细介绍了设计的X射线发生器电源的功能构成,阐述了高压与灯丝高频逆变电路、高压倍压整流电路以及控制系统的拓扑结构、设计过程和仿真结果;最后给出了试验结果以及与安检系统进行联试的扫描图像,测试结果表明,其技术指标达到安检设备用X射线发生器的要求。展开更多
The purpose of this paper is to propose a friendly computational framework able to investigate particles tracking through different compartments of the human being using dedicated numerical techniques.The main buildin...The purpose of this paper is to propose a friendly computational framework able to investigate particles tracking through different compartments of the human being using dedicated numerical techniques.The main building blocks of this framework are:(i) convenient X-ray spectra calculator for different filter/anode combination,(ii) realistic voxelized computational human phantom,(iii)validated Geant4-based Monte Carlo simulation,and(iv)extendable and free image processing software.We studied the multimodality SPECT/CT cardiac imaging using specific spectrum of the ^(99m)Tc and 120 kVp X-ray beam,for internal and external exposure,respectively.The application of the framework to quantify the loss of information between combined and simultaneous coregistration was carried out.Two main objectives were addressed:(i) an ideal geometry was simulated for educational purposes(ii) a realistic case study was carried out,for research purposes,concerning the modeling of the GE Infinia II 3/800 Gamma Camera.We compared the effect of using a Na I(Tl) and CZT crystal detector,and a LEHR and MEGP collimator with different uptake values of the heart organ(1:1,5:1 and 50:1) for both simultaneous andcombined SPECT/CT images.We confirmed the usefulness of the Na I(Tl) crystal with the LEHR collimator for such kind of study.展开更多
文摘设计了一种新型X射线发生器电源,应用高频开关电源技术、高压倍压整流技术与单片机控制技术,成功研制出一台额定电压160 k V,管电流0.4 m A^1.2 m A的用于安检设备的X射线发生器。介绍了X射线发生器的应用场合、工作原理、主要设计思想及国内外研究现状;详细介绍了设计的X射线发生器电源的功能构成,阐述了高压与灯丝高频逆变电路、高压倍压整流电路以及控制系统的拓扑结构、设计过程和仿真结果;最后给出了试验结果以及与安检系统进行联试的扫描图像,测试结果表明,其技术指标达到安检设备用X射线发生器的要求。
基金Supported by the College of Applied Medical Sciences Research Centre and the Deanship of Scientific Research at King Saud University of Saudi Arabia
文摘The purpose of this paper is to propose a friendly computational framework able to investigate particles tracking through different compartments of the human being using dedicated numerical techniques.The main building blocks of this framework are:(i) convenient X-ray spectra calculator for different filter/anode combination,(ii) realistic voxelized computational human phantom,(iii)validated Geant4-based Monte Carlo simulation,and(iv)extendable and free image processing software.We studied the multimodality SPECT/CT cardiac imaging using specific spectrum of the ^(99m)Tc and 120 kVp X-ray beam,for internal and external exposure,respectively.The application of the framework to quantify the loss of information between combined and simultaneous coregistration was carried out.Two main objectives were addressed:(i) an ideal geometry was simulated for educational purposes(ii) a realistic case study was carried out,for research purposes,concerning the modeling of the GE Infinia II 3/800 Gamma Camera.We compared the effect of using a Na I(Tl) and CZT crystal detector,and a LEHR and MEGP collimator with different uptake values of the heart organ(1:1,5:1 and 50:1) for both simultaneous andcombined SPECT/CT images.We confirmed the usefulness of the Na I(Tl) crystal with the LEHR collimator for such kind of study.
