正常颈动脉分叉MRA成像的实验研究  

The experimental MR angiographic study of normal common carotid artery bifurcations(CCAB)

作　　者：唐光才[1] 陈祖望[2] 周康荣[2] 

机构地区：[1]泸州医学院附院CT室,646000 [2]上海医科大学附属中山医院放射科,上海20003

出　　处：《中国临床医学影像杂志》1999年第6期395-397,共3页Journal of China Clinic Medical Imaging

摘　　要：目的： 探讨不同成像参数及成像序列对ＭＲＡ图像的影响。方法： 对７ 名健康自愿者分别进行ＭＲＡ检查，观察每一种主要成像参数改变及不同成像序列对ＭＲＡ图像的影响。结果： 血流／组织信号对比随ＴＲ时间延长而降低； ＴＥ时间越长， 颈动脉分叉部血流信号减弱越明显； 射频偏转角越大， 血流／组织信号对比就越高， 但血管搏动伪影也越明显； 激励层面增厚可增加成像范围， 且可提高信噪比， 但空间分辨率下降。３ＤＭＲＡ空间分辨率比２ＤＭＲＡ高， 但成像范围受限，检查时间长。结论： 影响颈动脉分叉ＭＲＡ成像的序列及参数较多， 恰当地选择成像参数和成像序列可提高ＭＲＡ图像质量。Objective:To explore the effect of different imaging sequences and variable imaging parameters change upon CCABs MRA.Methods: fourteen CCABs in 7 volunteers were performed MRA examination with 1 5 T system,which the effect of every main imaging parameter changing and different imaging sequences on CCABs MRA were researched.Results:the contrast of MR signal between blood flow and state tissue was reduce as TR prolong,while the MR signal of internal carotid artery blub(ICAB) was lost more as TE increase;and the contrast of MR signal between blood flow and state tissue was better as flip angle increase,but pulsatile artifact of vessel was more clear,increasing slice thickness can enlarge image range and improve signal/noise ratio,but the space resolution of image was decrease;3D MRA had better space resolution compared to 2D MRA,but imaging range was limited.Conclusion:various parameters and imaging sequences can influence CCABs MR imaging,but correctly choose imaging parameters and imaging sequence can improve MRA film quality.

关 键 词：颈动脉分叉 磁共振血流成像 实验 

分 类 号：R445.2[医药卫生—影像医学与核医学] R331.3[医药卫生—诊断学]