| 刘秋颖,任卫东,唐波.超声造影评价兔股动脉狭窄[J].中国医学影像技术,2008,24(12):1863~1866 |
| 超声造影评价兔股动脉狭窄 |
| Contrast-enhanced ultrasonography in the assessment of rabbits femoral artery stenosis |
| 投稿时间：2008-06-19 修订日期：2008-09-22 |
| DOI： |
| 中文关键词: 超声检查 造影剂 动脉 狭窄 |
| 英文关键词:Ultrasonography Contrast agent Arteries Stenosis |
| 基金项目: |
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| 中文摘要: |
| 目的 比较超声造影(谐波造影与彩超造影)与普通超声评价小动脉狭窄的应用价值。方法 20只兔右股动脉采用针控线栓法制作成不同狭窄程度(≤50%和＞50%),对所有模型进行普通超声检查和彩超造影、谐波造影,并将狭窄程度判定结果与数字减影血管造影(DSA)进行对照。结果 谐波造影后流道显示清晰,图像类似DSA血管影像,其狭窄率测定与DSA相关性高于普通超声(相关系数r在≤50%组为0.91 vs 0.79,＞50%组为0.93 vs 0.70);彩超造影可将狭窄处血流紊乱放大显示;造影后PSV、VTI、PI均较造影前增加,但RI、SVR不变,且频移幅度随造影剂清除逐步恢复至造影前水平。结论 超声造影容易寻找狭窄部位、能清晰再现兔股动脉流道轮廓、提高狭窄率测定的准确度,可用于诊断管径纤细的小动脉狭窄。 |
| 英文摘要: |
| Objective To compare the diagnosis value of contrast-enhanced color Doppler ultrasonography and harmonic gray scale imaging with common ultrasonography in the assessment of little arteny stenosis. Methods Twenty rabbits underwent common ultrasonography and contrast-enhanced ultrasonography after femoral artery stenosis established by means of control label needle. According to the grade of stenosis, the models were divided into two groups (≤50% and ＞50%), and the stenosis rates measured by harmonic gray scale imaging and DSA were compared. Results Harmonic gray scale imaging displayed flow tract more clearly than common ultrasonography, and the stenosis rate measured by it was correlated well with that of DSA, the coefficient correlation was 0.91 vs 0.79 in ≤50% group and 0.93 vs 0.70 in ＞50% group. In contrast-enhanced color Doppler ultrasonography amplified turbulence and PSV, PI, VTI increased after contrast agent was injected to rabbits, but SVR and RI did not changed. As time passed, frequency excursion decreased. Conclusion Contrast-enhance ultrasound is easy to find the location of stenosis, delineate the outline of the vascular lumen, increase the accuracy of stenosis rate, and should be applied to evaluate little artery stenosis. |
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