110 mm容积螺旋穿梭扫描在全脑灌注及脑血管联合成像中应用的探讨

【摘要】
目的 探讨宝石能谱计算机断层扫描（computed tomography，CT）110 mm容积螺旋穿梭扫描在全脑灌注及脑血管联合成像中的应用价值。
方法 采用宝石能谱CT，注射造影剂后从颅底到头顶进行110 mm范围的容积螺旋穿梭扫描，重建56例受检者的全脑灌注及脑血管图像，同时期同机器常规扫描模式所得脑动脉重建检查100例，脑静脉三维重建检查25例，脑血流灌注检查80例分别建立数据库。容积螺旋穿梭扫描图像中，随机抽取脑灌注图像20例，44例非烟雾病患者中随机抽取脑动脉薄层最大密度投影（maximum intensity projection，MIP）像、脑动脉三维重建图像各20例，从17例进行脑静脉三维重建图像中随机抽取15例，与随机抽取相同例数的常规扫描模式下同类型图像，就图像质量进行评分后比较。
结果 宝石能谱CT 110 mm容积螺旋穿梭扫描所得脑灌注图像及脑静脉三维重建图像质量与常规扫描模式差异无显著性，容积螺旋穿梭扫描和常规扫描模式两组脑灌注图像得分分别为4.00（3.00，4.00） vs 4.00（3.00，4.00），P=0.477，脑静脉三维重建图像得分分别为5.00（4.00，5.00） vs 4.00（4.00，5.00），P=0.119。脑动脉薄层MIP图像质量优于常规扫描模式，其评分分别为4.00（4.00，5.00） vs 4.00（4.00，4.00），P=0.016。脑动脉三维重建图像质量差于常规扫描模式，评分分别为3.00（3.00，4.00） vs 4.00（4.00，5.00），P＜0.001。
结论 宝石能谱CT 110 mm容积螺旋穿梭扫描能够有效地对脑血管疾病患者进行影像学综合评估。

Application of 110 mm Volume Helical Shuttle Scanning in Whole Brain Perfusion and Cerebral Vascular Joint Imaging

【Abstract】
Objective To discuss the value of GE Discovery CT750 HD 110 mm volume helical shuttle scanning in whole brain perfusion and cerebral vascular joint imaging.
Methods Using GE Discovery CT750 HD, after contrast agent injection, volume helical shuttle scanning to the range of 110 mm from the base to top of the head was applied. Whole brain perfusion and cerebral vascular image of 56 patients were constructed. At the same time in the same machine through the conventional scan model, 100 cases of cerebral artery reconstruction, 25 cases of cerebral venous 3D reconstruction imaging, and 80 cases of brain perfusion were selected. All the cases of image mentioned above were used to establish database respectively. For the volume helical scan model, 20 cases of cerebral perfusion images were selected randomly, 20 cases of cerebral arteries reconstructed 3D images and cerebral arteries thin-layer maximum intensity projection(MIP) images were randomly selected in accordance with the random from 44 patients without moyamoya disease, 15 cases were selected from 17 cases of cerebral venous reconstruction images, these images were respectively compared on image quality to the images with the same amount and types selected from the conventional scan model. Then value of application of GE Discovery CT750 HD 110 mm volume helical shuttle scanning in whole brain perfusion and cerebral vascular joint imaging was discussed.
Results As to image quality, the difference of brain perfusion and vein reconstruction of volume helical shuttle scanning and conventional scanning pattern had no statistical significance, the scores and statistics results respectively were:brain perfusion image:4.00(3.00, 4.00) vs 4.00(3.00, 4.00), P=0.477, cerebral venous reconstruction image:5.00(4.00, 5.00) vs 4.00(4.00, 5.00), P=0.119. The image quality of cerebral artery thin-section MIP images of volume helical shuttle scanning was better than the conventional scanning mode, the scores and statistics results respectively were:4.00(4.00, 5.00) vs 4.00(4.00, 4.00), P=0.016. The image quality of cerebral artery reconstruction image of volume helical shuttle scanning was worse than the conventional scanning mode, the scores and statistics results respectively were:3.00(3.00, 4.00) vs 4.00(4.00, 5.00), P＜0.001.
Conclusion GE Discovery CT750 HD 110 mm volume helical shuttle scanning could be effectively used for comprehensive imaging evaluation of cerebrovascular disease patients.