Three-dimensional reconstruction of curves from pairs of projection views in the presence of error. I. Algorithms.

Three-dimensional reconstruction of curves from pairs of projection views in the presence of error. I. Algorithms.
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在存在误差的情况下,根据成对的投影视图对曲线进行三维重建。

DOI:
10.1118/1.597952
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发表时间:
1997
期刊:
影响因子:
3.8
通讯作者:
Pizer,SM
Pizer,SM
中科院分区:
医学3区
文献类型:
--
作者:
Bullitt,E;Liu,A;Pizer,SM

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我们之前已经描述了一种使用MRA作为重建基础的3D脑内血管重建方法。在MRA的基础上,通过从投影血管造影片分割2D曲线并将这些曲线重建为3D来添加仅通过血管造影看到的额外血管。脑内血管重建是困难的,至少有两个原因。首先,即使人眼不能这样做,也必须在投影图像上关联2D曲线。第二,三维曲线必须在存在错误的情况下重建,例如配准不良、图像失真和二维曲线的错误定义。本文是第一个两个解决的具体问题,重建的三维曲线从一个给定的一对二维曲线中存在的错误。该方法显式地分离了从一对投影视图中可以确定和不能确定的内容。它还能够识别由视平面误差产生的中断,在这种中断之外继续重建,以及定位和估计中断的大小。这些测量还可以用于估计一对2D曲线之间的区域差异的长度,从而导致对一对2D曲线进行联合收割机以创建3D对象(匹配值)的能力的定量估计。匹配值可以反过来用作自动关联2D曲线对的策略的一部分。本文提供了在存在误差的情况下将给定的一对2D曲线重建成3D曲线和计算匹配值的方法。错误分析在配套报告中给出。
We have previously described an approach to 3D intracerebral vascular reconstruction that uses an MRA as a reconstruction base. Additional vessels seen only by angiography are added by segmenting 2D curves from projection angiograms and reconstructing these curves into 3D, building upon the MRA. Intracerebral vascular reconstruction is difficult for at least two reasons. First, 2D curves must be associated on projection images even when the human eye cannot do so. Second, 3D curves must be reconstructed in the presence of errors such as misregistration, image distortion, and misdefinition of 2D curves. This paper is the first of two that address the specific issue of reconstruction of a 3D curve from a given pair of 2D curves in the presence of error. The method explicitly separates what can and cannot be determined from a pair of projection views. It is also capable of recognizing interruptions produced by viewplane errors, of continuing reconstruction beyond such interruptions, and of localizing and estimating the magnitude of the interruptions. These measurements can also be used to estimate the lengths of regional disparities between a pair of 2D curves, leading to a quantitative estimate of the capacity of a pair of 2D curves to combine to create a 3D object (match value). Match values can be used, in turn, as part of the strategy for automatically associating pairs of 2D curves. This paper provides methods for reconstructing a given pair of 2D curves into 3D in the presence of error and for calculating match values. Error analysis is given in the companion report.
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