双源CT直接法与间接法在下肢静脉成像中的应用效果比较

Comparison of the effects of direct and indirect dual-source computed tomography on lower extremity venous imaging

目的探讨双源CT直接法及间接法在下肢静脉成像中的应用效果。方法选取2015年1月—2017年12月我院54例下肢静脉病变患者作为研究对象,随机将其分为研究组(n=34)与对照组(n=20),研究组采用双源CT直接造影法对患者进行检查,对照组采用双源CT间接造影法对患者进行检查,并对以上两组患者所得图片进行MPR、MIP、VR等后处理,对两组所得下肢CT静脉成像图像质量、诊断正确性进行比较。结果采用直接法或间接法对于不同下肢静脉疾病的诊断,其差异没有统计学意义。两组患者下肢静脉成像检查结果表明静脉血管均显示优良。研究组图像质量评级明显好于对照组,差异有统计学意义(P<0.05)。结论双源CT在下肢静脉成像中应用价值较高,直接法在图像质量方面明显优于间接法,两种造影方法在临床应用中各有优缺点,应根据患者实际情况进行造影方法的选择。

Objective To investigate the effects of dual-source CT direct method and indirect method on lower extremity venous imaging. Methods Fifty-four patients with lower limb venous diseases treated in our hospital from January 2015 to December 2017 were selected as study subjects and were randomly divided into the study group（n =34）and the control group（n =20）.The double-source CT direct radiography was used to examine patients in study group,and the dual-source CT indirect radiography was used to examine patients in control group.MPR,MIP,VR and other post-processing were performed for the patients from the two groups,and the quality and diagnostic accuracy of CT venography images of lower limbs were compared between the two groups. Results There was no significant difference in the diagnosis of lower extremity venous diseases by direct or indirect method.The results of the imaging examination of lower limb veins in both groups showed excellent results.The image quality rating of the study group was significantly better than that of the control group,and the difference was statistically significant（P〈 0.05）. Conclusion Dual-source CT is of high value in lower limb venous imaging,and the direct method is superior to the indirect method in image quality.Both methods have their advantages and disadvantages in clinical application.The choice of imaging method should be made according to the actual situation of the patient.