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首页> 外文会议>Conference on physiology and function from multidimensional images >Measurement of stenosis from magnetic resonance angiography using vessel skeletons
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Measurement of stenosis from magnetic resonance angiography using vessel skeletons

机译：使用容器骨架测量磁共振血管造影的狭窄

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Measurement of stenosis due to atherosclerosis is essential for interventional planning. Currently, measurement of stenosis from magnetic resonance angiography (MRA) is made based on 2D maximum intensity projection (MIP) images. This methodology, however, is subjective and does not take full advantage of the 3D nature of MRA. To address these limitations we present a deformable model for reconstructing the vessel surface with particular application to the carotid artery. The deformable model is based on a cylindrical coordinate system of a curvilinear axes. In this coordinate system, the location of each point on the surface of the deformable model is described by its axial, circumferential and radial position. The points on the surface deform in the radial direction so as to minimize discontinuity in radial position between adjacent points while maximizing the proximity of the surface to local edges in the image. The algorithm has no bias towards either narrower or wider cross- sectional shapes and is thus appropriate for the measurement of stenosis. Axes of the vessels are indicated manually or determined by axes detection methods. Once completed, the surface reconstruction lends itself directly to 3D methods for measuring cross-sectional diameter and area.
机译：由于动脉粥样硬化引起的狭窄的测量对于介入规划至关重要。目前，基于2D最大强度投影（MIP）图像来制造来自磁共振血管造影（MRA）的狭窄的测量。然而，这种方法是主观的，并且无法充分利用MRA的3D性质。为了解决这些限制，我们提出了一种可变形的模型，用于重建血管表面，特别适用于颈动脉。可变形模型基于曲线轴的圆柱坐标系。在该坐标系中，通过其轴向，周向和径向位置描述可变形模型表面上的每个点的位置。表面上的点在径向方向上变形，以最小化相邻点之间的径向位置的不连续，同时最大化表面的局部到图像中的局部边缘。该算法对较窄或更宽的横截面形状没有偏置，因此适用于测量狭窄。血管的轴线由轴检测方法手动指示或由轴检测方法确定。一旦完成，表面重建就会直接向3D方法带来用于测量横截面直径和面积的3D方法。

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