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Human aorta: preliminary results with virtual endoscopy based on three-dimensional MR imaging data sets.

机译:人主动脉:基于三维MR成像数据集的虚拟内窥镜检查的初步结果。

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摘要

PURPOSE: To determine the feasibility of use of magnetic resonance (MR) imaging data sets to perform virtual intraarterial endoscopy (VIE). MATERIALS AND METHODS: 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. RESULTS: 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. CONCLUSIONS: 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.
机译:目的:确定使用磁共振(MR)成像数据集进行虚拟动脉内窥镜检查(VIE)的可行性。材料与方法:对7名女性和14名男性患者(年龄在9-86岁[平均年龄42岁])进行了各种病理性主动脉病变,进行了三维g增强的梯度回波MR成像。使用原型软件,将VIE后处理算法(基于射线投射)应用于成像数据集。常规血管造影的发现被用作参考标准。结果:在每种情况下均从内部观察到血管壁,并清楚地描绘出以下病理状况:先天性双主动脉弓中的两个腔和矫正后的单个腔,缩窄的血管变窄,Leriche综合征的特征,狭窄,咬合以及夹层的真假。结论:VIE的局限性包括原始数据集的图像质量,选择以最小化腔内伪影的阈值以及血管壁固有的平滑度。

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