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| 包含光源面积的整体相位衬度调制传递函数 | |
| 引用本文： | 武杰,陈家璧,张学龙.包含光源面积的整体相位衬度调制传递函数[J].光电工程,2012,39(1):145-150. |
| 作者姓名： | 武杰 陈家璧 张学龙 |
| 作者单位： | 武杰:上海理工大学 a.光电信息与计算机工程学院b.医疗器械与食品学院，上海 200093 陈家璧:上海理工大学 a.光电信息与计算机工程学院 张学龙:上海医疗器械高等专科学校医学影像设备系，上海 200093 |
| 基金项目： | 国家重点基础研究发展计划 (973)项目(2007CB935303)；国家自然科学基金 (60778031) |
| 摘 要： | 在部分相干光学理论的基础上,建立了一个整体相位衬度调制传递函数理论模型,模型中包含了光源焦点面积大小对X线相衬成像系统相位调制的影响,并通过数值模拟和数据计算,提出了X线相衬成像系统对光源焦点面积的选择原则,和焦点面积确定条件下的成像参数优化方法,结果表明,这种包含X线光源面积因素的相位衬度调制传递函数模型,更能反映整个系统的光学成像性能,更能有利于成像参数的优化设计。 |
| 关 键 词： | 相位衬度 部分相干 微焦点 调制传递函数 |
| 收稿时间： | 2011/8/10 |
The Integral Phase Contrast Modulation Transfer Function in Consideration of the Light Source Area |
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| WU Jie,a,b,CHEN Jia-bi,a,ZHANG Xue-long.The Integral Phase Contrast Modulation Transfer Function in Consideration of the Light Source Area[J].Opto-Electronic Engineering,2012,39(1):145-150. | |
| Authors: | WU Jie a b CHEN Jia-bi a ZHANG Xue-long |
| Affiliation: | 1.a.School of Optical-Electrical and Computer Engineering;b.School of Medical Instrument and Food Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China; 2.Medical Imaging Equipment Department,Shanghai Medical Instrumentation College,Shanghai 200093,China) |
| Abstract: | Based on the optical partially coherent theory, a new integral phase contrast modulation transfer function theoretical model is established in consideration of the X-ray source area parameter. Through the simulation and calculation, a comprehensive analysis of the spatial coherence of micro-focus X-ray phase contrast imaging system is displayed. A new source size selection method and parameter optimization method are put forward under the actual experimental condition. The results show that the model containing X-ray source area factor can reflect the entire performance of optical imaging system better, and avail to the imaging parameters optimization design. |
| Keywords: | phase contrast partial coherence micro focus modulation transfer function |
| 本文献已被 CNKI 等数据库收录！ | |