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arXiv 1107.5186cs.CVphysics.med-ph
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医学超声信号的快速多尺度边缘检测

Fast multi-scale edge-detection in medical ultrasound signals

Norwegian University of Science of Technology(挪威科技大学)

Preben Gråberg Nes

摘要:

在这篇文章中,我们提出了一种快速的多尺度边缘检测方案的医疗超声信号。边缘检测器基于连续小波变换的众所周知的性质。为了实现良好的本地化的边缘和检测只有重要的边缘,我们研究了小波变换的最大线。通过在几个中间尺度上计算小波变换,可以得到两个尺度之间的最大值线。为了减少计算工作量和时间,我们建议一个时间尺度滤波过程,它只使用几个尺度连接跨时间尺度平面的模极大值。该过程的设计是基于对医学超声信号的典型边缘对应的最大线的研究。这项研究使我们能够构建一个算法的医疗超声信号,满足要求的速度,但不牺牲可靠性。边缘检测算法已被应用到一个大类的医学超声信号,包括肿瘤,肝脏和动脉图像。我们的研究结果表明,该算法有效地检测此类信号中的主要特征,包括低对比度的边缘。

英文摘要:

In this article we suggest a fast multi-scale edge-detection scheme for medical ultrasound signals. The edge-detector is based on well-known properties of the continuous wavelet trans- form. To achieve both good localization of edges and detect only significant edges, we study the maxima-lines of the wavelet transform. One can obtain the maxima-lines between two scales by computing the wavelet transform at several intermediate scales. To reduce computational effort and time we suggest a time-scale filtering procedure which uses only few scales to connect modulus-maxima across time-scale plane. The design of this procedure is based on a study of maxima-lines corresponding to edges typical for medical ultrasound signals. This study allows us to construct an algorithm for medical ultrasound signals which meets the demand for speed, but not on expense of reliability. The edge-detection algorithm has been applied to a large class of medical ultrasound sig- nals including tumour-, liver- and artery-images. Our results show that the proposed algorithm effectively detects major features in such signals, including edges with low contrast.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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