Davis C P, Ladd M E, Romanowski B J, Wildermuth S, Knoplioch J F, Debatin J F
Magnetic Resonance Imaging Center, Department of Radiology, University Hospital, Zürich, Switzerland.
Radiology. 1996 Apr;199(1):37-40. doi: 10.1148/radiology.199.1.8633169.
To determine the feasibility of use of magnetic resonance (MR) imaging data sets to perform virtual intraarterial endoscopy (VIE).
Seven female and 14 male patients (aged 9-86 years [mean, 42 years]) with various pathologic aortic conditions underwent three-dimensional gadolinium-enhanced spoiled gradient-echo MR imaging. With prototype software, VIE postprocessing algorithms (based on ray casting) were applied to the imaging data sets. Findings at conventional angiography were used as the standards of reference.
The vessel wall was seen from the inside in each case, and the following pathologic conditions were depicted clearly: the two lumina in a congenial double aortic arch and the single lumen after correction, vessel narrowing in coarctations, characteristics of Leriche syndrome, stenoses, occlusions, and the true and false lumina of dissections.
Limitations of VIE include the image quality of the original data set, the threshold chosen to minimize intraluminal artifacts, and the inherent smoothing of vessel walls.
确定使用磁共振（MR）成像数据集进行虚拟动脉内内窥镜检查（VIE）的可行性。
对7名女性和14名男性患者（年龄9 - 86岁[平均42岁]），患有各种病理性主动脉疾病，进行三维钆增强扰相梯度回波MR成像。使用原型软件，将VIE后处理算法（基于光线投射）应用于成像数据集。传统血管造影的结果用作参考标准。
在每种情况下均能从内部观察到血管壁，并且清晰描绘出以下病理状况：先天性双主动脉弓中的两个管腔以及矫正后的单管腔、缩窄部位的血管狭窄、勒里什综合征的特征、狭窄、闭塞以及夹层的真腔和假腔。
VIE的局限性包括原始数据集的图像质量、为最小化管腔内伪影而选择的阈值以及血管壁的固有平滑处理。
