Revolution CT虚拟平扫在直肠癌诊断中的应用价值研究  

Application value of Revolution CT virtual plain scan in rectal cancer

作　　者：刘文[1] 张礼荣[1] 石卉[1] LIU Wen;ZHANG Lirong;SHI Hui(Department of Radiology,Affiliated Hospital of Jiangsu University,Zhenjiang,Jiangsu 212001,China)

机构地区：[1]江苏大学附属医院影像科,江苏镇江212001

出　　处：《现代医药卫生》2023年第3期429-433,共5页Journal of Modern Medicine & Health

基　　金：中国博士后科学基金(2018M640446)。

摘　　要：目的 研究Revolution CT虚拟平扫在直肠癌诊断中的应用价值。方法 搜集2017年10月至2018年7月在该院手术治疗并于术前行Revolution CT常规能谱平扫及双期虚拟平扫的70例直肠癌患者影像资料。对常规能谱平扫及双期虚拟平扫的图像质量进行主观评分及客观评价[计算对比噪声(CNR)],对直肠癌病灶的诊断准确性(包括对直肠癌肠壁厚度、浆膜面的受累情况、直肠癌周围淋巴结显示情况的评价)及扫描剂量进行评估,并进行对比研究。结果 常规能谱平扫及双期虚拟平扫图像质量主观评分比较,差异无统计学意义(P>0.05)。双期虚拟平扫CNR值均高于常规能谱平扫,差异有统计学意义(P<0.05)。常规能谱平扫及双期虚拟平扫对直肠癌肠壁厚度判断、浆膜面的受累情况、直肠癌周围淋巴结显示情况比较,差异均无统计学意义(P>0.05)。常规能谱平扫有效剂量值低于双期虚拟平扫,差异有统计学意义(P<0.05)。双期增强扫描分离出虚拟平扫图像,可以减少约30%辐射剂量。结论 在直肠癌诊断时,Revolution CT虚拟平扫代替常规能谱平扫可以在减少辐射剂量的同时满足临床诊断需求。Objective To study the application value of Revolution computed tomography(CT) virtual plain scan in the diagnosis of rectal cancer.Methods The imaging data of 70 cases of rectal cancer patients who underwent surgery in this hospital from October 2017 to July 2018 and underwent conventional energy spectrum Revolution CT plain scan and dual-phase virtual plain scan before operation were collected.The subjective scores and objective evaluation [calculate the contrastnoise(CNR)]of image quality of conventional energy spectrum CT plain scan and dual-phase virtual plain scan were performed, and the diagnostic accuracy of rectal cancer lesions(including the evaluation of intestinal wall thickness of rectal cancer, the involvement of serous surface, and lymph node display around rectal cancer) and scanning dose were evaluated and compared.Results There was no significant difference in subjective scores of image quality between conventional energy spectrum CT plain scan and dual-phase virtual plain scan(P>0.05).The CNR value of dual-phase virtual plain scan was higher than that of conventional energy spectrum plain scan, and the difference was statistically significant(P<0.05).There were no significant differences in intestinal wall thickness of rectal cancer, the involvement of serous surface and lymph node display around rectal cancer between conventional energy spectrum plain scan and dual-phase virtual plain scan(P>0.05).The effective dose of conventional energy spectrum plain scan was lower than that of dual-phase virtual plain scan, and the difference was statistically significant(P<0.05).The radiation dose could be reduced about 30% by separating the virtual plain image from the dual-phase enhanced scan.Conclusion In the diagnosis of rectal cancer, Revolution CT virtual plain scan instead of conventional energy spectrum plain scan can reduce the radiation dose and meet the needs of clinical diagnosis.

关 键 词：直肠癌 虚拟平扫 能谱CT 辐射剂量 诊断 应用价值 

分 类 号：R81[医药卫生—放射医学] R735.3[医药卫生—临床医学]