Analysis of edge-tracking errors inherent in fluoroscopic images of the beating heart.
Analysis of edge-tracking errors inherent in fluoroscopic images of the beating heart.
复制标题
分析跳动心脏荧光图像中固有的边缘跟踪误差。
DOI：
10.1097/00004424-199403000-00004
复制
发表时间：
1994
影响因子：
6.7
通讯作者：
Copenhaver,GL
中科院分区：
文献类型：
--
作者：
McInerney,JJ;Weldner,PW;Herr,MD;Copenhaver,GL
原理和目的：由于动态三维心脏表面形状与其投影图像之间的复杂关系，使用二维轮廓来测量心脏的位移会产生误差。方法：采用高精度X射线散射成像技术重建心动周期中左心室游离壁的三维形态。然后将三维表面的位移与二维投影轮廓上的位移进行比较。轮廓位移误差被确定为心脏周期和心脏之间变异性的时间函数。结果：轮廓测量与心脏表面测量之间的差异范围为0%到125%的峰峰值位移，沿着33%到75%的轮廓轮廓，覆盖66%的心脏周期。结论二维轮廓位移提供了三维心脏表面上运动模式的不一致测量。
RATIONALE AND OBJECTIVES.Because of the complex relationships between the dynamic three-dimensional cardiac surface shape and its projected image, errors arise with the use of two-dimensional silhouettes to measure displacements of the heart. The character and frequency of such errors are examined.METHODS.A high-precision x-ray scatter imaging technique was used to reconstruct the three-dimensional shape of the left ventricular free wall throughout the cardiac cycle. Displacements of the three-dimensional surface were then compared with those on the two-dimensional projected silhouette. Silhouette displacement errors were determined as a function of time during the cardiac cycle and variability between hearts.RESULTS.Differences between silhouette measurements and those on the cardiac surface range from 0% to 125% of peakto-peak displacements occur, along 33% to 75% of the silhouette contours and cover 66% of the cardiac cycle.CONCLUSION.Two-dimensional silhouette displacements provide inconsistent measurements of motion patterns on the three-dimensional cardiac surface.