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

Value of CT low tube voltage combined with high current technique in preoperative diagnosis of renal carcinoma

目的:探讨X射线计算机体层扫描(Computed tomography,CT)机低管电压联合高管电流技术应用于肾癌术前诊断的价值。方法:将2021年6月至2023年6月期间我院收治的肾癌患者103例作为研究对象,纳入的所有患者均接受全腹多期增强CT检查,并根据扫描参数的不同分为对照组(n=51)和观察组(n=52),对照组多期增强CT扫描的管电压为120 kV,管电流选择300 mA,观察组多期增强CT扫描管电压为90 kV,管电流为550 mA。比较两组患者临床基线资料、图像质量、图像清晰度以及辐射剂量。结果:两组基线资料比较差异无统计学意义(P>0.05);两组患者实质期(Nephrographic phase,NP)和皮髓质期(Corticomedullary phase,CMP)的肿瘤感兴趣区(Region of interest,ROI)、信噪比(Signal to noise ratio,SNR)、对比度噪声比(Contrast-to-noise ratio,CNR)以及肾实质ROI相比较差异无统计学意义(P>0.05);两组患者NP、CMP图像清晰度对比差异无统计学意义(P>0.05);观察组患者NP、CMP期的有效剂量(Effective dose,ED)、总剂量长度乘积(Dose length produc,DLP)均较对照组低(P<0.05)。结论:采用低管电压高管电流扫描方案对肾癌患者进行术前诊断取得的扫描图像清晰度较高、图像质量较好,且能够有效减少辐射剂量。

Objective:To evaluate the value of Computed tomography(CT)with low tube voltage combined with executive current in preoperative diagnosis of renal carcinoma.Methods:A total of 103 patients with renal cancer admitted to our hospital from June 2021 to June 2023 were selected as the study objects.All the included patients received whole-abdominal multi-phase enhanced CT examination,and were divided into control group(n=51)and observation group(n=52)according to different scanning parameters.The tube voltage of multi-phase enhanced CT scan in the control group was 120 kV.The tube current was selected to be 300 mA.In the observation group,the tube voltage and tube current of multi-phase enhanced CT scan were 90 kV and 550 mA.Clinical baseline data,image quality,image clarity and radiation dose were compared between the two groups.Results:There was no significant difference in baseline data between the two groups(P>0.05).Nephrographic phase(NP)and Corticomedullary phase(CMP)Region of interest in 2 groups There were no significant differences in ROI,Signal to noise ratio(SNR),Contrast-to-noise ratio(CNR)and renal parenchymal ROI(P>0.05).There was no significant difference in NP and CMP image clarity between the two groups(P>0.05).The Effective dose(ED)and Dose length products(DLP)of NP and CMP stage in observation group were lower than those in control group(P<0.05).Conclusion:The scan images obtained by the low tube voltage current scanning scheme for renal cancer patients have higher resolution,better image quality,and can effectively reduce the radiation dose.