下肢静脉流速模型的磁共振血管成像研究

Study of the speed model of the veins of lower extremities in magnetic resonance angiography

摘要: 目的:探讨下肢静脉血管流速模型的磁共振血管成像(magnetic resonance angiography,MRA),为临床工作提供合理可靠的依据。方法:分析血管模型不同流速与MRA信号改变的关系。结果:液体流速为0.4 mm/s时,静止与流动液体信号差异有统计学意义(P<0.05),但肉眼尚无法分辨;液体流速为1.2 mm/s时,肉眼可明显分辨二者信号差别。结论:液体流速对MRA影像有影响;下肢血管MRA在临床应用方面是方便可行的。

Abstract: Objective: To study the speed model of the veins of lower extremities in the magnetic resonance angiography (MRA),and to provide basic reference for clinical practice.Methods: The relationship between the flow speeds and the signal changes in MRA was analyzed.Results: The signal was different between static and flowing fluids on magnetic resonance machine when the speed was 0.4 mm/s (P<0.05),and the changes could not be differentiated by the naked eye.When the flowing speed was 1.2 mm/s,the signal changes could be clearly differentiated by the naked eye.Conclusions: Different flowing speed has different influence on MRA imaging.MRA is convenient and feasible in diagnosis of diseases in the lower extremities.