Cine MR Imaging of Aortic Dissection ; Comparison with Spin-echo MR Imaging.

主动脉夹层的电影 MR 成像；

基本信息

批准号：
07671006
负责人：
MATSUNAGA Naofumi
金额：
$ 1.6万
依托单位：
Yamaguchi University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1995
资助国家：
日本
起止时间：
1995 至 1996
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07671006/
关键词：
Aortic dissection MR imaging

项目摘要

Purpose of this study is to evaluate the role of cine magnetic resonance imaging (cine MR) in the diagnosis of aortic dissection, we reviewed both spin-echo MR imaging (spin-echo MR) and cine MR of 53 patients that had been documented by CT in 53 patients, aortography in 30, and surgery in five. They were divided into three groups ; double-barreled type (n=30), thrombosed type (n=18), and penetrating atherosclerotic ulcers (n=5), according to the CT features. Thirteen patients had type A,three type A+B and 37 type B dissections. In the double-barreled type, identification of the intimal flap, and true and false lumen differntiation were possible with spin-echo MR in 29 of 30 patients, and on cine MR in all 30. Variable intensities in the true and false lumens were shown on spin-echo MR,whereas flowing blood of both lumens was always visualized as a hyperintensity, and slow flow and partial thrombus as a hypointensity on cine MR.The small entry was identified as a signal void in the fal … More se lumen in 26 patients on spin-echo MR,and in 24 on cine MR.In other two patients, signal void via the large entry was not observed on cine MR.To-and-fro movement of flow via the communicating orifice could be identified in all 3 patients on cine MR,by stting the optimal axial plane of cine MR to the communicating orifice as a reference of a signal void seen on spin-echo MR.Re-entry was identified in 4 out of 6 patients with attempt to set the optimal plane of cine MR.In 18 patients with thrombosed type, the presence or absence of flow in the false lumen could not be evaluated by spin-echo MR alone, because of thickened aortic wall (n=7) or showing the various intensities such as bright (n=4), and dark (n=3), whereas on cine MR,the thrombosed false lumen was visualized as a hypointensity (n=16), suggesting no flow in the false lumen, and as a hyperintensity (n=2) mimicking double-barreled type. Outpouching projecting from the true into false lumens of ulcerlike projection (ULP) (n=8) and penetrating atherosclerotic ulcer (n=5) was observed as a signal void on spin-echo MR,and as a hyperintensity on cine MR,which features were similar to that of aortography. Spin-echo signal intensities alone were not accurate indicator in differentiating thrombus from flow-related enhancement. Because cine MR images are sensitive to the movement of flowing blood, they may allow signal produced by flow to be differentiated with more clinical confidence from that of intraluminal abnormality and thus complement findings from spin-echo images. In conclusion, cinematic display of cine MR facilitates more easy recognition of presence or absence of flow in the false lumen, and signal void via the intimal tear during cardiac cycle, simulating real-time cardiac imaging, therfore cine MR provides additional and physiologic information in the evaluaito of aortic dissection. Less

目的OS研究是评估Cine磁共振成像（Cine MR）在主动脉夹层成像（Spin-Echo MR）诊断中的作用（Cine MR）和53例CT患者的CINE MR，这些患者已记录了53例患者，主动脉造影，30例和五组手术。在30例患者中有29例中有29名和Cine MR中的MR中的所有30例MR。在Spin-Echo上的可变强度始终可视化为高强度，而在Cine上的低位症则是Small Mr. FAL中的信号空隙…在Cine的Cine先生，通过通信的Orifician在CINE MR上，在CINE先生流动流动时，未观察到26例Spin-Echo MR信号空隙的患者的SE Lumen。，通过将最佳轴向轴向e MR刺到通信孔口中，作为在6名患者中，有4名患者中有4名在Spin -echo先生中看到的信号空隙的参考，并试图使用Thrope的Cinein 18患者的最佳平面由于硫壁（n = 7）或显示各种强度，例如明亮（n = 4）和深色（n = 3），因此无法单独使用Spin-Echo MR评估假管腔中流动的类型或没有。 E可视化血栓性假腔被视为高强度（n = 16），在假管腔中没有流动，并且高于高强度（n = 2）的高度高度（n = 2），从真正的Olse ulcerlike投影（ULP）中投射出来。（n = 8）和穿透性动脉粥样硬化溃疡（n = 5）是自旋回波MR上的信号无效的，并且仅作为Cine MR Raphy上的高强度。与流量相关的增强。从临床异常中进行了更大的临床置信Cine MR提供了添加性和生理性的杂质，从主动脉夹上进行评估