Detection of Photoacoustic Signals from Blood in Dental Pulp  

作　　者：Azusa Yamada Satoko Kakino Yuji Matsuura Azusa Yamada;Satoko Kakino;Yuji Matsuura(Division of Oral Health Sciences, Tokyo Medical and Dental University, Tokyo, Japan;Graduate School of Biomedical Engineering, Tohoku University, Sendai, Japan;Division of Oral Health Sciences, Tokyo Medical and Dental University, Tokyo, Japan)

机构地区：[1]Division of Oral Health Sciences, Tokyo Medical and Dental University, Tokyo, Japan [1]Graduate School of Biomedical Engineering, Tohoku University, Sendai, Japan [2]Division of Oral Health Sciences, Tokyo Medical and Dental University, Tokyo, Japan

出　　处：《Optics and Photonics Journal》2016年第9期229-236,共9页光学与光子学期刊（英文）

摘　　要：Photoacoustic waves from hemoglobin solutions in dental roots are detected by using a 1064-nm laser and an ultrasonic soft probe based on a composite transducer on the tooth surface. The high-frequency ultrasonic waves are detected from a tooth with a hemoglobin solution in the pulp cavity due to the large heat transfer coefficient and absorption coefficient of hemoglobin. The spectral intensities of frequency components higher than 1 MHz show good correlation with the hemoglobin solution concentrations, and maps of frequency spectra calculated by taking short-time Fourier transforms clearly exhibit the effect of absorbance in dental pulp.Photoacoustic waves from hemoglobin solutions in dental roots are detected by using a 1064-nm laser and an ultrasonic soft probe based on a composite transducer on the tooth surface. The high-frequency ultrasonic waves are detected from a tooth with a hemoglobin solution in the pulp cavity due to the large heat transfer coefficient and absorption coefficient of hemoglobin. The spectral intensities of frequency components higher than 1 MHz show good correlation with the hemoglobin solution concentrations, and maps of frequency spectra calculated by taking short-time Fourier transforms clearly exhibit the effect of absorbance in dental pulp.

关 键 词：Photoacoustic Sensing Dental Root Hemoglobin Detection Near Infrared Laser 

分 类 号：O17[理学—数学]