| 张彦,唐杰,罗渝昆,赵应征,王辰允,梅兴国,韩伟.不同声压与正常兔肝脏造影增强效果关系研究[J].中国医学影像技术,2004,20(3):352~355 |
| 不同声压与正常兔肝脏造影增强效果关系研究 |
| Relationship of different acoustic pressures and enhancement effects of contrast agent in ultrasonography on normal rabbit liver |
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| DOI： |
| 中文关键词: 声压 造影 视频强度 增强时间 肝 |
| 英文关键词:Acoustic pressure Contrast Video intensity Enhanced time Liver |
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| 中文摘要: |
| 目的 探讨不同声压与自制脂质类超声造影剂对正常兔肝实质造影增强效果的相互关系。方法 5只健康新西兰大白兔经耳缘静脉团注0.1 ml/kg自制脂质类超声造影剂,使用声压范围1~609 kPa,分为9个水平,每个水平均造影10次(每只兔2次),观察肝实质的增强效果,并对峰值视频强度及增强时间进行量化分析。结果 声压低于56 kPa时,肝实质峰值视频强度无差异;声压继续升高,峰值视频强度则逐渐降低;声压达609 kPa时,肝实质无增强效果。增强时间随声压的升高而逐渐降低。结论 声压在1~56 kPa范围内变化不影响自制脂质类超声造影剂的造影效果,超过76 kPa则造影效果明显降低。 |
| 英文摘要: |
| Objective To assess the relationship of different acoustic pressures and enhancement effects using self-made lipid ultrasound contrast agents on normal rabbit liver parenchyma. Methods Self-made lipid ultrasound contrast agents were administered to 5 normal rabbits through ear veins at dose of 0.1 ml/kg. The acoustic pressures were divided into 9 different levels raging from 1 to 609 kPa.Each level was injected 10 times (every rabbit was injected 2 times ). We observed the enhancement of liver parenchyma and quantified the peak video intensity and enhanced time. Results The peak video intensity of liver parenchyma has no difference at acoustic pressures less than 56 Kpa. However, peak video intensity decreased gradually when acoustic pressures keep on increasing. There was no enhancement of liver parenchyma at acoustic pressure 609 kPa. Conclusion The changes of acoustic pressures at range of 1-56 kPa don't affect the contrast enhancement using self-made lipid ultrasound contrast agents. When acoustic pressures greater than 76 kPa the contrast enhancement will decrease obviously. |
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