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目的 研究造影剂注射速率对螺旋CTAP动态增强的影响 ,寻找适宜的注射速率。方法 3 2例肝癌患者分成四组。经肠系膜上动脉注入浓度为 2 2 5mg/ml的泛影萄胺 80ml ,注射速率分别为A :3 .0ml/s ;B :2 .5ml/s ;C :2 .0ml/s ;D :1.5ml/s ,选一固定层面作 2 5次单层动态扫描 ,间隔时间 3s。测定每幅图像上肝实质和肿瘤的CT值 ,分别画出时间—密度曲线。分析肝实质和肿瘤动态增强特征。结果 ①四组肝实质增强峰值时间 (s)分别为A :3 4.6± 5 .4;B :3 7.2± 4.2 ;C :3 9.1± 3 .8;D :49.7± 5 .1。A、B、C之间无显著性差异 (Ρ >0 .0 5 ) ,A、B、C与D之间有显著性差异 (Ρ <0 .0 1)。②四组肝实质增强峰值 (HU )分别为A :187.5± 13 .1;B :183 .8± 11.2 ;C :178.4± 7.8;D :165 .3± 8.9。A、B、C之间无显著性差异 (Ρ >0 .0 5 ) ,A、B、C与D之间有显著性差异 (Ρ <0 .0 1)。③四组肿瘤均无明显增强。结论 当造影剂用 2 2 5mg/ml的泛影萄胺 80ml时 ,①采用 2 .0～ 3 .0ml/s注射速率优于 1.5ml/s。②在造影剂 2 .0～ 3 .0ml/s注射速率范围内 ,螺旋CTAP增强特征与速率无关。因此选用 2 .0ml/s注射速率为佳
Objective To study the effect of injection rate of contrast medium on the dynamic enhancement of spiral CTAP and find the suitable injection rate. Method 3 2 cases of liver cancer patients were divided into four groups. The upper mesenteric artery was infused with 80 ml of panepamine at a concentration of 225 mg / ml and the injection rates were respectively A: 3.0 ml / s; B: 2.5 ml / s; C: 2.0 ml / ml / s, choose a fixed level for 25 single-layer dynamic scanning interval of 3s. The CT values of the liver parenchyma and tumor on each image were determined and the time-density curve plotted separately. Analysis of liver parenchyma and tumor dynamic enhancement characteristics. Results ① The peak time (s) of enhancement of hepatic parenchyma in the four groups were A: 4.6 ± 5.4; B: 3 7.2 ± 4.2; C: 3 9.1 ± 3.8; D: 49.7 ± 5 .1. There was no significant difference between A, B and C (P> 0.05), but there was a significant difference between A, B, C and D (P <0.01). ② The four groups of liver parenchyma enhanced peak (HU) were A: 187.5 ± 13.1; B: 183.8 ± 11.2; C: 178.4 ± 7.8; D: 165.3 ± 8.9. There was no significant difference between A, B and C (P> 0.05), but there was a significant difference between A, B, C and D (P <0.01). ③ no significant increase in the four groups of tumors. Conclusion When the contrast agent with 225mg / ml of 80mg panephedrine, ① with 2.0 ~ 3.0ml / s injection rate better than 1.5ml / s. ② In the contrast medium 2.0 ~ 3.0ml / s injection rate range, spiral CTAP enhanced features and speed has nothing to do. So choose 2 .0ml / s injection rate is better