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目的:对比多排螺旋CT直接法下腔静脉成像测量径线,与间接法下腔静脉成像测量径线是否存在差异。方法:回顾性分析30例(男14例,女16例,年龄23~65岁,中位年龄44岁)直接法下腔静脉成像的患者图像,收集30例(男10例,女20例,年龄20~66岁,中位年龄43岁)腹部增强检查患者静脉期图像。通过GE adw4.6后处理工作站对原始图像行MIP、MPR重建,分别测量下腔静脉右心房入口、第一肝门、肾盂、左右髂总静脉分叉上方平面的长径、短径,并测量左肾静脉汇入下腔静脉上方1cm处下腔静脉CT值。结果:下腔静脉右心房入口、第一肝门、肾盂、髂总静脉分叉上方平面的长径及短径,直接法成像分别为(3.02±0.44,2.06±0.32)、(2.29±0.49,1.39±0.52)、(2.46±0.44,1.73±0.45)、(2.30±0.38,1.66±0.46);间接法成像分别为(2.88±0.43,1.95±0.31)、(2.37±0.59,1.17±0.37)、(2.28±0.32,1.63±0.31)、(2.25±0.21,1.47±0.34),两者之间无明显统计学差异。直接法左肾静脉汇入下腔静脉上方1 cm处CT值为313.43±50.90HU远高于间接法的95.50±22.17HU。结论:多层螺旋CT直接法下腔静脉成像与间接法下腔静脉成像,下腔静脉的不同层面径线测量无明显差异,直接法成像管腔内造影剂浓度高于间接法,显示下腔静脉更好,测量结果为正确评估下腔静脉疾患提供参考数据。
OBJECTIVE: To compare whether there is a difference between the diameters of inferior vena cava imaging by multi-slice spiral CT direct method and the indirect method of measuring inferior vena cava. Methods: Thirty patients (14 males and 16 females, aged 23-65 years and 44 years old) underwent direct vena cava imaging were retrospectively analyzed. 30 patients (10 males and 20 females, Age 20 to 66 years old, median age 43 years) abdominal enhanced examination of venous phase images. Through the GE adw4.6 post-processing workstation on the original image line MIP, MPR reconstruction, were measured inferior vena cava right atrium entrance, the first hepatic portal, renal pelvis, left and right iliac superior vena cava bifurcation above the plane of the long axis and short axis, and measure Left renal vein venous access 1cm above the inferior vena cava inferior vena cava CT value. Results: The diameters of long axis and short axis of the superior hepatic portal, renal pelvis and iliac vein bifurcation were (3.02 ± 0.44, 2.06 ± 0.32) and (2.29 ± 0.49, 1.39 ± 0.52, 2.46 ± 0.44, 1.73 ± 0.45, 2.30 ± 0.38 and 1.66 ± 0.46, respectively. The indirect imaging methods were (2.88 ± 0.43, 1.95 ± 0.31), (2.37 ± 0.59, 1.17 ± 0.37) (2.28 ± 0.32,1.63 ± 0.31), (2.25 ± 0.21,1.47 ± 0.34), no significant difference between the two. Direct method into the left renal vein above the inferior vena cava 1 cm above the CT value of 313.43 ± 50.90HU much higher than the indirect method of 95.50 ± 22.17HU. Conclusions: There is no significant difference in the diameter of inferior vena cava measured by multi-slice spiral CT directly with inferior vena cava imaging and indirect inferior vena cava imaging. The contrast medium concentration in direct imaging tube is higher than that in indirect method, Veins are better and measurement results provide reference data for proper assessment of IVC disease.