16排移动CT脑血管造影的初步结果报告

目的探讨国产16排移动CT在脑血管造影（CTA）的稳定性、成像质量及其螺旋扫描容积范围内的辐射剂量指数（CTDIvol）等情况。 方法选取陆军总医院附属八一脑科医院的4例志愿者，于2018年7月至8月采用16排移动CT行脑血管增强螺旋扫描，获得原始断层图像，利用Anythink CT Plus图像处理软件，以容积重建（VR）和最大密度投影（MIP）技术显示三维脑血管图像，分析其成像质量；并与8排移动CT的CTA结果作对比，分析二者CTA成像的稳定性和扫描容积范围内的CTDIvol。 结果16排移动CT颅内血管成像稳定，可清晰显示Willis环、大脑前动脉、大脑中动脉和大脑后动脉及其分支血管，16排移动CT在扫描容积范围内的CTDIvol[（20.600±0.087）mGy]低于8排移动CT[（29.300±0.335）mGy]，差异有统计学意义（P<0.05）。 结论16排移动CT螺旋扫描可以获得稳定的CTA成像，清晰显示CTA图像，扫描容积范围内CTDIvol显著低于8排移动CT。

Preliminary results reported with a 16-slice mobile CT angiography

ObjectiveTo investigate the stability, imaging quality and radiation dose index (CTDIvol) of domestic 16-slice mobile CT in cerebral angiography (CTA). MethodsFour adult volunteers, who were admitted to the Affiliated BaYi Brain Hospital from July to Augest 2018, were selected in our clinical trial. The 16-slice mobile CT was used to perform cerebral vascular enhanced helical scanning to obtain the original tomographic image. The three-dimensional brain was displayed by volume rendering (VR) and maximum intensity projection (MIP) using Anythink CT Plus image processing software. CTA images for another 4 cases of 8-slice mobile CT were compared, and the stability, imaging quality and CTDIvol of the two groups were analyzed. ResultsThe 16-slice mobile CT intracranial angiography was stable, and the Willis ring, anterior cerebral artery, middle cerebral artery and posterior cerebral artery and its branch vessels were clearly displayed. The CTDIvol of the 16-silce mobile CT in the volume rendering (VR) was less than CTDIvol of the 8-slice CT (20.60 mGy vs. 29.30 mGy, P<0.05). ConclusionThe 16-slice mobile CT helical scanning can obtain stable CTA imaging and clearly show cerebral angiography images. CTDIvol is significantly lower than 8-slice mobile CT in the volume range.