Quantification of effective attenuation coefficients using continuous wavelet transform of photoacoustic signals

被引：6
|
作者：
Hirasawa, Takeshi [1 ]
Fujita, Masanori [2 ]
Okawa, Shinpei [1 ]
Kushibiki, Toshihiro [1 ]
Ishihara, Miya [1 ]
机构：
[1] Natl Def Med Coll, Dept Med Engn, Tokorozawa, Saitama 3598513, Japan
[2] Natl Def Med Coll, Div Environm Med, Tokorozawa, Saitama 3598513, Japan
来源：
APPLIED OPTICS | 2013年 / 52卷 / 35期
关键词：
BLOOD OXYGENATION; CALIBRATION; BIOMEDICINE; SYSTEM; TISSUE;
D O I：
10.1364/AO.52.008562
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A method for quantifying the effective attenuation coefficients of optical absorbers by using the continuous wavelet transform (CWT) to calculate the time-resolved frequency spectra of photoacoustic signals is proposed. Because the coefficients can be quantified according to the relative intensity of the frequency content of the signals, it is unnecessary to determine the fluences. A computational simulation reveals that the time-resolved frequency spectra exhibit better correlation with the coefficients than do power spectra calculated using a Fourier transformation. The CWT-based method was experimentally verified, and the coefficients were quantified with mean square error of 2.0 cm(-1). (C) 2013 Optical Society of America
引用
收藏
页码：8562 / 8571
页数：10
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