Quantification of effective attenuation coefficients using continuous wavelet transform of photoacoustic signals
Quantification of effective attenuation coefficients using continuous wavelet transform of photoacoustic signals
复制标题
DOI：
10.1364/ao.52.008562
复制
发表时间：
2013-12-10
期刊：
影响因子：
1.9
通讯作者：
Ishihara, Miya
中科院分区：
文献类型：
--
作者：
Hirasawa, Takeshi;Fujita, Masanori;Ishihara, Miya
提出了一种利用连续小波变换（CWT）计算光声信号时分辨频谱来量化光吸收器有效衰减系数的方法。由于系数可以根据信号频率含量的相对强度来量化，因此不需要确定影响。计算模拟表明，时间分辨频谱与系数的相关性优于用傅里叶变换计算的功率谱。实验验证了基于cwt的方法，量化系数均方误差为2.0 cm（-1）。(C) 2013年美国光学学会
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