IFIR技术在肺动脉成像的可行性研究  

The Feasibility of Magnetic Resonance Angiography Using Interpolated Finite Impulse Response IFIR Technique on Pulmonary Artery Imaging

作　　者：王军[1] 孙骏[1] 罗先富[1] 朱庆强[1] 吴晶涛[1] 叶靖[1] 王守安[1] 孙继全[1] 

机构地区：[1]江苏省苏北人民医院医学影像科,扬州225001

出　　处：《临床放射学杂志》2016年第6期943-945,共3页Journal of Clinical Radiology

摘　　要：目的探讨插入有限脉冲响应(IFIR)技术行肺动脉成像的可行性。方法对28例受试者行IFIR肺动脉成像序列扫描,在ADW 4.6工作站上行最大密度投影(MIP)重建。对肺动脉主干及其各分支显示程度进行评分,与肺动脉的信噪比、年龄、有无呼吸运动伪影等因素对比分析。结果 26例(92.9%)可显示肺动脉主干血管,24例(85.7%)能清晰观察到肺动脉主干及一、二级分支,20例(71.4%)可清晰显示到肺动脉主干及一、二、三、四级分支。呼吸运动影响肺动脉评分,有无呼吸伪影组评分平均秩次分别为58.25及36.42(P=0.005)。不同年龄组间血管评分不同,<70岁组及≥70岁组血管评分平均秩次为60.42及46.58(P=0.008)。信噪比与肺动脉评分无关(P=0.124)。结论磁共振IFIR非对比剂增强序列可清楚显示肺动脉主干及其各级分支,是一种具有很好临床应用前景的无创、安全、可行的肺动脉血管成像技术。Objective To investigate the feasibility of Interpolated Finite Impulse Response（IFIR） technique in MR angiography（MRA） of pulmonary artery.Methods Twenty-eighteen patients underwent the IFIR sequence were included in this study.MIP images of pulmonary artery were reconstructed on AW4.6 workstation.Display qualities of pulmonary artery and its branches were evaluated by a 100-score scale.The signal to noise radios of pulmonary artery,respiratory motion artifacts,pulmonary artery branches and genders or ages factors were compared and analyzed as well.Results the main trunk of pulmonary artery was showed clearly in 26 patients（92.9%）,in 24 patients（85.7%） we could see the main branch and rank 1 to 2 branches of pulmonary artery and in 20 patients（71.4%） the main branch and rank 1 to 4 branches of pulmonary artery were all displayed.Respiratory movement affects the evaluation of pulmonary artery,so within the groups of with or without breath artifact,the Average score were 58.25 and 36.42 respectively;（P = 0.005）.there was no statistical difference（P = 0.124） for SNR numbers.Therewas a statistical difference in the evaluation of pulmonary artery branches between age groups,the average scores of 70 years old group and ≥70 years old group are 60.42 and 46.58（P= 0.008）; respectively.Conclusion Non-contrast enhanced magnetic resonance angiography of pulmonary artery with IFIR technique in 1.5T MRI machine is feasible in clinical routine practice.It is simple and noninvasive.Besides,different grades of pulmonary artery branches can be displayed clearly.

关 键 词：磁共振血管造影术 插入有限脉冲响应 肺动脉 

分 类 号：R445.2[医药卫生—影像医学与核医学] R563.5[医药卫生—诊断学]