Detection of Photoacoustic Signals from Blood in Dental Pulp
Detection of Photoacoustic Signals from Blood in Dental Pulp作者机构：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
出 版 物：《Optics and Photonics Journal》 (光学与光子学期刊（英文）)
年 卷 期：2016年第6卷第9期
页 面：229-236页
学科分类：07[理学] 0701[理学-数学] 070101[理学-基础数学]
主 题：Photoacoustic Sensing Dental Root Hemoglobin Detection Near Infrared Laser
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.
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