Fourier synthesis image reconstruction by use of one-dimensional position-sensitive detectors.
Fourier synthesis image reconstruction by use of one-dimensional position-sensitive detectors.
复制标题
使用一维位置敏感探测器进行傅里叶合成图像重建。
DOI：
10.1364/ao.42.004176
复制
发表时间：
2003
期刊：
影响因子：
1.9
通讯作者：
M. Oda
中科院分区：
文献类型：
--
作者：
J. Kotoku;K. Makishima;Y. Okada;H. Negoro;Y. Terada;H. Kaneda;M. Oda
介绍了一种改进的用于硬X射线成像的傅里叶合成光学系统，并通过数值模拟证实了新光学系统的基本性能。傅立叶合成成像仪的原始概念是利用非位置敏感的硬X射线探测器耦合到单独的双栅调制准直器。改进的概念采用一维位置敏感检测器（例如CdTe条检测器）代替每个双栅调制准直器的第二栅层。与原始设计相比，这在几个方面改进了成像性能。一个性能改进是平均透射率增加两倍，从1/4增加到1/2。第二个优点是正弦和余弦分量都可以从单个栅格探测器模块中导出，因此成像模块的数量可以减半。此外，它同时提供沿着深度方向的信息。这反过来又使三维成像硬X射线显微镜用于医疗诊断，结合放射性示踪剂。这样的显微镜的概念设计，旨在提供4毫米的视野和400微米的空间分辨率。
An improvement of Fourier synthesis optics for hard x-ray imaging is described, and the basic performance of the new optics is confirmed through numerical simulations. The original concept of the Fourier synthesis imager utilizes nonposition-sensitive hard x-ray detectors coupled to individual bigrid modulation collimators. The improved concept employs a one-dimensional position-sensitive detector (such as a CdTe strip detector) instead of the second grid layer of each bigrid modulation collimator. This improves the imaging performance in several respects over the original design. One performance improvement is a two-fold increase in the average transmission, from 1/4 to 1/2. The second merit is that both the sine and cosine components can be derived from a single grid-detector module, and hence the number of imaging modules can be halved. Furthermore, it provides information along the depth direction simultaneously. This in turn enables a three-dimensional imaging hard x-ray microscope for medical diagnostics, incorporating radioactive tracers. A conceptual design of such a microscope is presented, designed to provide a field of view of 4 mm and a spatial resolution of 400 microm.
影响因子：
1.8
作者：
Takahashi, T;Watanabe, S
通讯作者：
Watanabe, S