相位对比磁共振成像观察颅内基底动脉、上矢状窦和中脑导水管的生理流动模式  被引量:6

Phase-contrast MRI observing the physiological flow modes of basilar artery,superior sagittal sinus and aqueduct of midbrain

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作  者:钟熹[1] 汤日杰[1] 江魁明[2] 凌国辉[1] 李建生[1] 麦慧[3] 唐文艳[3] 

机构地区:[1]广州医科大学附属肿瘤医院放射科,广东广州510095 [2]广东省妇幼保健院放射科,广东广州511400 [3]广州医科大学附属第三医院放射科,广东广州510150

出  处:《中国医学影像技术》2014年第12期1797-1800,共4页Chinese Journal of Medical Imaging Technology

基  金:广东省科技计划项目(粤科规划字[2013]137号-8)

摘  要:目的相位对比磁共振成像(PC MRI)观察颅内基底动脉(BA)、上矢状窦(SSS)和中脑导水管(AM)的生理流动模式。方法选取健康志愿者37名,采用PC MRI测量BA、SSS和AM流体的流动模式。观察时相-流速曲线特征,记录舒张期和收缩期的峰值流速及达峰时相点,并计算两峰值时相差率,记录心动周期内每搏流量、净流量。结果 BA呈单向高幅流动,时相-流速曲线为"缓降-速升-缓降"型;SSS呈单向低幅流动,曲线为"缓降-缓升-缓降"型,两波峰时相差率最小;AM脑脊液呈双向振动式流动,呈"缓升-缓降-缓升型",时相差率最大,绝对每搏流量(74.03±33.22)×10-3 ml,向4脑室净流量为(3.70±2.78)×10-3 ml。BA心动周期内两流速波峰间时相差率小于SSS、AM(F=26.63,P<0.01)。结论 BA、SSS及AM的生理流动模式不同。脑室系统、脑组织容积在心动周期内发生动态变化。PC MRI时相-流速曲线可直观、准确地观察脑血管、脑脊液的流动模式。Objective To explore the physiological flow modes of basilar artery(BA),superior sagittal sinus(SSS)and aqueduct of midbrain(AM)with phase-contrast magnetic resonance imaging(PC MRI).Methods Thirty-seven healthy volunteers were selected and the flow pattern of BA,SSS and AM were measured by 2DPC MRI.The features of phasevelocity curve were observed,the diastolic and systolic peak velocity and time phase point were recorded.Then time phase point rate were calculated.The stroke volume and net flow in cardiac cycle was recorded.Results The flow mode of BA was one-way with high amplitude and the mode of phase-flow velocity curve appeared as"slow descending-fast rising-slow descending";the flow mode of SSS appeared as one-way with low amplitude and the type of phase-flow velocity curve appeared as"slow descending-slow rising-slow descending";the flow mode of AM appeayed as "slow rising-slow descendongslow rising";time phase point rate was greatest,and its absolute stroke volume was(74.03±33.22)×10^-3 ml,and net flows to the fourth ventricle was(3.70±2.78)×10^-3 ml.The time phase point rate of BA were obviously less than SSS and AM(F=26.63,P〈0.01).Conclusion Physiological flow patterns of BA,SSS and AM were different.The ventricular system and brain tissue were changed dynamically in a cardiac cycle indicates volumes.The phase-flow velocity curves of PC MRI can observe the physiological flow modes of cerebral vessels and cerebrospinal fluid intuitively and accurately.

关 键 词:脑血管 脑脊液 磁共振成像 

分 类 号:R3[医药卫生—基础医学] R814.42

 

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