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Recent developments in photoacoustic imaging and sensing for nondestructive testing and evaluation

Visual Computing for Industry,Biomedicine,and Art 2021年第1期4卷 50-62页

作者： Sung-Liang Chen Chao Tian University of Michigan-Shanghai Jiao Tong University Joint Institute Shanghai Jiao Tong University200240 ShanghaiChina Engineering Research Center of Digital Medicine and Clinical Translation Ministry of Education200030 ShanghaiChina State Key Laboratory of Advanced Optical Communication Systems and Networks Shanghai Jiao Tong University200240 ShanghaiChina Department of Precision Machinery and Precision Instrumentation University of Science and Technology of China230026 HefeiAnhuiChina

photoacoustic(PA)imaging has been widely used in biomedical research and preclinical studies during the past two *** has also been explored for nondestructive testing and evaluation(NDT/E)and for industrial *** paper describes the basic principles of PA technology for NDT/E and its applications in recent *** technology for NDT/E includes the use of a modulated continuous-wave laser and a pulsed laser for PA wave excitation,PA-generated ultrasonic waves,and all-optical PA wave excitation and *** technology for NDT/E has demonstrated broad applications,including the imaging of railway cracks and defects,the imaging of Li metal batteries,the measurements of the porosity and Young’s modulus,the detection of defects and damage in silicon wafers,and a visualization of underdrawings in paintings.

关键词： photoacoustic imaging photoacoustic sensing Nondestructive testing Nondestructive evaluation photoacoustic microscopy

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Detection of photoacoustic Signals from Blood in Dental Pulp

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Optics and Photonics Journal 2016年第9期6卷 229-236页

作者： 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

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

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