摘要
目的:通过下肢静脉血管模型的磁共振成像研究,为临床诊断下肢血管疾病提供合理的参考依据。材料与方法:通过建立下肢静脉血管模型观察分析:(1)不同流速与MRV信号改变的关系;(2)不同成像角度与MRV信号改变的关系;(3)不同狭窄程度与不同成像角度协同作用情况下的MRV信号改变。结果:(1)液体流速为0.4mm/sec时,静止与流动液体信号差别有统计学意义(P<0.05),但肉眼尚无法分辨,流速1.2mm/sec时,肉眼可明显分辨二者信号差别;(2)在成像角度小于10°后见测量的较实际的管径变小;(3)随着狭窄程度加重,角度对图像影响变显著。结论:液体流速、管腔狭窄程度、成像角度三者在不同程度上对MRV影像有影响。
Purpose： To provide the basic reference for clinical practice by discussing the Magnetic Resonance Venography（MRV） of model in the lower extremities. Materials and Methods： Analyzing the three relationships between： （1）different speeds and signal changes, （2）different imaging angles and signal changes, and（ 3 ）eoeffect of different stenesis degree and imaging angles and signal changes. Results： （ 1 ） Signals are different between static and flowing fluids on magnetic resonance machine when the speed is 0.4mm/sec（ P = 0. 015 ）, but naked eyes cant differentiate it. When the flowing speed is access to 1.2mm/see, naked eyes can do it. （2） When the imaging angle is less than 10°, the result of measuring diameter is less than real condition. （3）The angle has more influence on images than stenosis. Conclusion： There are different influence and effect on MRV imaging with different flowing speeds, stenoses and imaging angle; MRV is a practical and feasible diagnestie method in the lower extremities.
出处
《现代医用影像学》
2009年第5期260-263,共4页
Modern Medical Imageology
关键词
下肢静脉
磁共振静脉造影术
模型
生物学
Vein of lower extremities Magnetic resonance venography Model Biological
