Theoretical Resolution of Computed Tomography Systems
Theoretical Resolution of Computed Tomography Systems
复制标题
计算机断层扫描系统的理论分辨率
DOI：
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发表时间：
1979
影响因子：
1.3
通讯作者：
R. Eisner
中科院分区：
文献类型：
--
作者：
G. Glover;R. Eisner
本文提出了一个简单的分析模型，它用于计算计算机层析成像系统的几何参数变化的脉冲响应。该模型适用于扇形束和平行束几何结构。结果表明，宽孔径探测器系统具有固有的分辨率限制，不能减轻过采样。此外，X射线源的最佳焦斑尺寸被发现是依赖于检测器的几何形状。
A simple analytic model is presented which is used to calculate the impulse response of a computed tomography system for parametric variations of the geometry. The model is useful for fan beam as well as parallel beam geometries. Results show that wide-aperture detector systems have intrinsic resolution limitations that are not mitigated by oversampling. Furthermore, the optimum focal spot size of the X-ray source is found to be dependent on the detector geometry.