基于动态磁聚焦的CT球管飞焦点研究

作为CT设备的核心器件，CT球管采用动态磁聚焦技术以利于大电流输出时小焦点的实现。飞焦点技术可以多角度记录每次扫描的每个投影，提高采样率，从而大幅改善图像清晰度，提高成像质量。当CT球管为1 A大电流输出时，采用CST软件对双磁四极透镜关键参数进行模拟仿真及优化，满足焦点目标尺寸为0.2 mm×0.6 mm的同时具备飞焦点功能。

Research of flying focal spot of the CT tube based on dynamic magnetic focusing

CT tube is the core component of CT equipment. CT tube adopts dynamic magnetic focusing technology to facilitate the realization of small focus when there is large current output. Flying focal spot technology can record each projection of each scan from multiple angles, improve the sampling rate, and greatly improve the image definition and quality. CST software is used to simulate the CT tube based on dynamic magnetic focusing. When the CT tube outputs high current of 1 A, the key parameters of the dual magnetic quadrupole lens are optimized to get the target size of focus of 0.2 mm×0.6 mm and the function of flying focus.