双能CT迭代重建技术联合虚拟平扫对肺癌的评估价值  

Significance of dual-energy CT sinogram affirmed iterative reconstruction combined with virtual non-contrast scan in evaluation of lung cancer

作　　者：杨瑞静 刘红明 马蕾 张宁 Yang Ruijing;Liu Hongming;Ma Lei;Zhang Ning(Department of Imaging,Henan Provincial People’s Hospital,People’s Hospital of Zhengzhou University,Zhengzhou 450000,China)

机构地区：[1]河南省人民医院,郑州大学人民医院医学影像科,郑州450000

出　　处：《中国实用医刊》2024年第10期67-70,共4页Chinese Journal of Practical Medicine

摘　　要：目的探讨双能CT迭代重建技术(SAFIRE)联合虚拟平扫(VNC)对肺癌的评估价值。方法前瞻性纳入2022年10月至2023年10月河南省人民医院经病理诊断明确为肺癌的58例患者作为研究对象。患者入院后均接受双能CT常规平扫(TNC), 采用SAFIRE技术重建动脉期、门脉期图像, 后得到SAFIRE动脉期VNC(VNCa)图像、静脉期VNC(VNCv)图像。测量患者TNC与VNC图像中各部位CT值及信号噪声比(SNR)值, 记录CT剂量指数(CTDIvol)、剂量长度乘积(DLP), 计算有效剂量(ED), 对图像进行主观评分。结果 TNC与VNCa、VNCv图像主动脉、肺动脉、竖脊肌各部位CT值及SNR值比较差异未见统计学意义(P>0.05);TNC图像可诊断率与VNCa、VNCv图像可诊断率比较差异未见统计学意义(P>0.05);TNC图像主观评分高于VNCa、VNCv(P<0.05), 而VNCa与VNCv图像主观评分比较差异未见统计学意义(P>0.05);双期双能扫描CTDIvol、DLP、ED水平低于常规三期扫描(P<0.05)。结论双能CT SAFIRE技术联合VNC可提供较为准确的病灶部位CT值, 图像质量良好, 可满足临床诊断需求, 且能降低辐射剂量。Objective To investigate the value of dual-energy CT sinogram affirmed iterative reconstruction(SAFIRE)combined with virtual non-contrast(VNC)in evaluation of lung cancer.Methods A prospective study was conducted on 58 patients diagnosed with lung cancer by pathological examination in Henan Provincial People’s Hospital from October 2022 to October 2023.After admission,the patients underwent dual-energy CT true non-contrast(TNC)scan;the arterial and portal phase images were reconstructed using SAFIRE technology,resulting in the SAFIRE arterial phase VNC(VNCa)and venous phase VNC(VNCv)images.The CT values and signal-to-noise ratio(SNR)values of each part in the TNC and VNC images were measured.The CT dose index(CTDIvol)and dose length product(DLP)were recorded,moreover,the effective dose(ED)was calculated;after then,the images were subjectively scored.Results There was no statistical significant difference in CT and SNR values of the aorta,pulmonary artery,and erector spinae muscle between TNC and VNCa,VNCv images(P>0.05).The diagnostic rate of TNC images had no significant differences with the diagnostic rafe of VNCa and VNCv images(P>0.05).The subjective score of TNC images was higher than that of VNCa and VNCv(P<0.05).However,there was no statistical significant difference in subjective scores between VNCa and VNCv images(P>0.05).The levels of CTDIvol,DLP,and ED in dual-phase dual-energy scanning were lower than those in conventional triple-phase scanning(P<0.05).Conclusions Dual-energy CT SAFIRE technology combined with VNC can provide more accurate CT values for lesion locations,with good image quality,which can meet clinical diagnostic reauirements and reduce radiation dose.

关 键 词：肺癌 双能CT迭代重建技术 虚拟平扫 主观评分 辐射剂量 

分 类 号：R734.2[医药卫生—肿瘤] R730.44[医药卫生—临床医学]