Wavelet Transform Analysis of Ultrasonic Wave Propagation in Cancellous Bone

被引：11

作者：

Hasegawa, Sho ^{[1
]}

Nagatani, Yoshiki ^{[1
]}

Mizuno, Katsunori ^{[2
]}

Matsukawa, Mami ^{[2
]}

机构：

[1] Kobe City Coll Technol, Kobe, Hyogo 6512194, Japan

[2] Doshisha Univ, Kyoto 6100321, Japan

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS | 2010年 / 49卷 / 07期

关键词：

IN-VITRO; STRUCTURAL ANISOTROPY; ACOUSTIC PARAMETERS; SLOW WAVES; SIMULATION;

D O I：

10.1143/JJAP.49.07HF28

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Ultrasonic waves targeted on cancellous bone separates into fast and slow waves according to the alignment of bone trabeculae. The characteristics of the specimen, however, can sometimes result in ambiguous wave separation. In this study, we proposed using wavelet transform as a new method of analyzing ultrasonic waveforms. Using continuous wavelet transform, two components were separated by fitting two-dimensional Gaussian function in scalogram. The relationship between bone volume fraction and the peak amplitude of the lower-and higher-frequency components showed a clear negative correlation; conversely, the relationship between bone volume fraction and the peak value ratio of the lower-and higher-frequency components showed a positive correlation. We recoginized lower-frequency component as the multiple reflections (forward scattering) in cancellous bone. (C) 2010 The Japan Society of Applied Physics

引用

页数：5

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