基于Cine扫描的4D-CT图像重建系统设计研究

The Design of 4D-CT Reconstruction System Base on Cine Mode CT Scan

为了在普通多螺旋CT上实现4D-CT重建,研究中采用VC++程序设计语言和模块化的程序设计方法,开发了基于Cine扫描的4D-CT图像重建系统。利用本系统,根据体表轮廓和肺组织的体积变化确定CT图像在呼吸周期中的相位,按相位分组排序后,实现4D-CT重建,其重建过程不依赖于外在的呼吸监测装置、不受CT机本身的软硬件限制,具有普遍适用性。

To implement 4D - CT reconstruction based on multi - slices CT scanner. A 4D - CT reconstruction software system based on Cine mode CT scan was developed by using VC ＋ ＋ progame language. The phase of each CT slice was determined according to the volume change rule of scanned thoracic cavity and lung tissue during respiration. All of the CT data with same phase, which where acquired in Cine mode, were resorted by the system into a same CT series, and several 3D - CT series with different phases could be gut.Then, all of the resorted multi - phase CT series result in a 4D - CT. The research suggested that time - resolved 4D - CT reconstruction could be implemented with any general multi - slice CT scarmers by using this 4D - CT reconstruction system, the process of the 4D CT data acquisition and reconstruction were independent on the respiration monitoring system and not restricted to the hardware or software of the CT scanner, therefore, it＇ s a universal 4D - CT reconstruction method.