64排螺旋CT机低管电压联合高管电流技术用于肾癌术前诊断的价值研究  

Study on the value of low tube voltage combined with high tube current technique of 64-slice spiral CT in preoperative diagnosis of renal carcinoma

作　　者：赖建钟 徐晓伟 伊枚娟 陈水斌[1] 黄艳丽 LAI Jian-zhong;XU Xiao-wei;YI Mei-juan(Department of Radiological Diagnosis,The 940th Hospital of People’s Liberation Army Joint Service Support Force,Zhangzhou 363000,China;不详)

机构地区：[1]联勤保障部队第九〇九医院(厦门大学附属东南医院)放射诊断科,福建漳州363000 [2]漳州市芗城区妇幼保健院功能影像科,福建漳州363000

出　　处：《中国医学装备》2022年第8期53-56,共4页China Medical Equipment

基　　金：福建省科学技术厅项目(ZZ2016J02)“CT低管电压联合高管电流技术用于肾癌术前诊断”。

摘　　要：目的:研究64排螺旋X射线计算机体层扫描(CT)机低管电压联合高管电流技术用于肾癌术前诊断的价值。方法:选取医院收治的156例肾癌患者,采用随机数表法将其分为观察组和对照组,每组78例,两组均行全腹部多期增强CT扫描,观察组扫描参数中管电压为90 k V,管电流为550 m A;对照组管电压为120 k V,自动选择管电流。两组对比剂均为碘普罗胺,注射速度均为3.0 ml/s,对比剂剂量分别为1.0 ml/kg、1.5 ml/kg。采集两组皮髓质期(CMP)图像和实质期(NP)图像,记录并计算CMP图像的肿瘤感兴趣区域(ROI)、肾实质ROI、对比度噪声比(CNR)和信噪比(SNR)以及NP图像的肿瘤ROI、肾实质ROI、肾静脉ROI和SNR。采用4分法对两组采集的CMP、NP图像进行评分;对比两组CMP、NP的剂量长度乘积(DLP)和有效剂量(ED)的辐射剂量和总辐射剂量。结果:两组CMP和NP图像质量及主观评分差异均无统计学意义(P>0.05)。观察组CMP、NP的DLP和ED的辐射剂量以及总辐射剂量均低于对照组,其差异有统计学意义(t_(CMP)=5.086,t=9.833;t_(NP)=6.483,t=10.802;t_(总辐射剂量)=10.984;P<0.05)。结论:64排螺旋CT机低管电压联合高管电流技术进行肾癌诊断可清晰显示肾癌患者病灶,同时可降低对比剂使用剂量和辐射剂量,有利于减轻辐射对肾功能的损害。Objective:To study the value of low tube voltage combined with high tube current technique of 64-slice spiral computed tomography(CT)in preoperative diagnosis of renal carcinoma.Methods:156 patients with renal carcinoma in our hospital were selected as the research objects and they were randomly divided into observation group(78 cases)and control group(78 cases).The two groups all underwent enhanced CT scan of multi-stage on whole abdomen.And in observation group,the tube voltage and the tube current of scan parameters were 90 k V and 550m A,respectively.And in control group,the tube voltage was 120k V and the tube current was automatically selected.The contrast mediums of the two groups were Iopromide,and the injection velocities both of them were 3.0ml/s,and the dosages of contrast mediums of them were 1.0ml/kg and 1.5ml/kg,respectively.The images of corticomedullary phase(CMP)and nephrographic phase(NP)of two groups were collected.And then,the region of interest(ROI)of tumor,the renal parenchyma ROI,contrast to noise ratio(CNR)and signal to noise ratio(SNR)of CMP images,and tumor ROI,renal parenchyma ROI,renal vein ROI and SNR of NP images were recorded and calculated.The collected CMP and NP images were scored by 4-point method.The radiation dose and total radiation dose of dose length product(DLP)and effective dose(ED)of CMP and NP between two groups were compared.Results:There were no significant differences in image quality and subjective score of CMP and NP between the two groups(P>0.05).The radiation dose and total radiation dose of DLP and ED of CMP and NP in observation group were significantly lower than those in control group(t_(CMP)=5.086,t=9.833,t_(NP)=6.483,t=10.802,t_(total radiation dose)=10.984,P<0.05),respectively.Conclusion:Low tube voltage combined with high tube current technique of 64-slice spiral CT can clearly show the lesions of patients with renal carcinoma in the diagnosis of renal carcinoma,and it can reduce the used dose of contrast medium and the radiation dose at the same time,whi

关 键 词：X射线计算机体层扫描(CT) 低管电压 高管电流 肾癌 对比剂 

分 类 号：R816.7[医药卫生—放射医学]