神经母细胞瘤双源CT增强扫描虚拟平扫与常规平扫的影像比较  

Comparison between the conventional non-contrast imaging with virtual non-contrast imaging from contrast study of dual-energy CT on neurobalstomas

作　　者：叶彤[1] 崔雪娥[1] 凃备武[1] 张永平[1] 李玉华[1] 汪登斌[1] 

机构地区：[1]上海交通大学医学院附属新华医院放射科,上海200092

出　　处：《放射学实践》2014年第6期691-693,共3页Radiologic Practice

摘　　要：目的:探讨双源CT虚拟平扫替代常规平扫在神经母细胞瘤应用的可行性。方法:16例神经母细胞瘤采用双源CT行常规平扫与140kV和80kV双能量增强扫描,将双能量增强扫描数据通过Liver VNC软件得到虚拟平扫图像。比较虚拟平扫与常规平扫的图像质量及钙化类型。比较肿瘤组织虚拟平扫与常规平扫的CT值,进行信度分析与BlandAltman分析。结果:虚拟平扫图像质量略低于常规平扫,但差异无统计学意义。虚拟平扫显示团块钙化、颗粒钙化与常规平扫相同,显示细沙样钙化不如常规平扫。肿瘤组织的虚拟平扫CT值与常规平扫CT值内在一致性良好,两者平均差值为-2.8HU。结论:双源CT虚拟平扫能替代常规平扫诊断钙化性神经母细胞瘤。Objective：To investigate the feasibility of virtual non-contrast image from the contrast-enhanced dual-energy CT to replace the conventional non-contrast image in the application of neuroblastomas.Methods：Sixteen patients with histopathologically diagnosed neuroblastomas were examined by dual-energy CT.The real non-contrast scanning was acquired routinely before contrast injection.The iodine contrast scan was acquired using dual-energy levels,140kV and 80kV, and the virtual non-contrast image was obtained using liver VNC software.The image quality scores and calcifications on virtual non-contrast image were compared with those on conventional non-contrast image.The average CT values of the tumor tissue on virtual non-contrast image were compared with those on conventional non-contrast image.The cronbachαwas assessed by reliability analysis and the average difference was assessed by Bland-Altman analysis.Results：There was no significant difference on image quality scores between virtual non-contrast image and conventional non-contrast image.The massive calcifications and grain-like calcifications on virtual non-contrast image were the same as those on conventional non-contrast-image.The sand-like calcifications were not as well displayed on virtual non-contrast image as those on conventional non-contrast image.The average CT values of the tumor tissue on virtual non-contrast image and those on real non-con-trast image showed good agreement and the average difference was -2.8HU.Conclusion：The dual-energy CT virtual non-contrast image can be used to replace the conventional non-contrast image in neuroblastomas with calcification.

关 键 词：体层摄影术 X线计算机 神经母细胞瘤 诊断技术和方法 

分 类 号：R730.44[医药卫生—肿瘤] R730.264[医药卫生—临床医学]