CT空间分辨力检测方法

CT Spatial Resolution Detection Methods

空间分辨力是指物体与背景在衰减程度上的差别与噪声相比足够大的情况下,CT扫描装置成像时分辨不同物体的能力。图像的空间分辨力受到系统几何分辨力、线束采样值、像素大小、卷积特性、几何极限等因素的影响,它是评价CT设备成像性能的最重要指标之一,在国内外关于CT检测标准中均被列为必检项目。

Spatial resolution refers to the ability of a CT scanning device to distinguish different objects in imaging when the difference in attenuation between the object and the background is sufficiently large compared to noise.The spatial resolution of images is influenced by factors such as system geometric resolution,bundle sampling values,pixel size,convolutional characteristics,geometric limits,etc.It is one of the most important indicators for evaluating the imaging performance of CT equipment and is listed as a mandatory item in domestic and foreign.