Geiser E A, Wilson D C, Gibby G L, Billett J, Conetta D A
Echocardiography Research Laboratory, College of Medicine, University of Florida, Gainesville.
J Am Soc Echocardiogr. 1991 May-Jun;4(3):235-46. doi: 10.1016/s0894-7317(14)80023-0.
A means of estimating the degree of enhancement of structure and suppression of background noise in filtered two-dimensional echocardiographic images is described. The method is termed the peak-to-background ratio. To test the method, two-dimensional short-axis echocardiographic images were enhanced with Laplacian operations of increasing mask size. There was excellent correlation between the calculated peak-to-background ratio and the subjective opinion of trained echocardiographers. Furthermore, radial length measurements made from images that were thought to be optimally enhanced by the peak-to-background ratio calculation showed the lowest interobserver mean differences. We conclude that the peak-to-background ratio does reflect improvement in characteristics of the image that favor more precise measurement (amplification of peaks and suppression of background) and can be used to help guide a dynamic approach to image processing.
本文描述了一种估计二维超声心动图滤波图像中结构增强程度和背景噪声抑制程度的方法。该方法称为峰背比。为了测试该方法，使用不同掩模大小的拉普拉斯算子对二维短轴超声心动图图像进行增强处理。计算得到的峰背比与训练有素的超声心动图专家的主观评价之间存在极佳的相关性。此外，从通过峰背比计算被认为是最佳增强的图像中进行的径向长度测量显示，观察者间的平均差异最小。我们得出结论，峰背比确实反映了有利于更精确测量的图像特征的改善（峰值放大和背景抑制），可用于指导动态图像处理方法。
