On the production and reproduction of sound by light

Bell, Alexander Graham

doi:10.2475/ajs.s3-20.118.305

Cited by 899 publications

(373 citation statements)

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“…The photoacoustic effect consists on the generation of sound waves from the absorption of a pulsed modulated radiation. It was discovered in 1880 by Alexander Graham Bell (Bell, 1880). This discovery raised the interests of other researchers, such as John Tyndall (Tyndall, 1881), Wilhelm Röntgen (Röntgen, 1881) and Lord Rayleigh (Rayleigh,1881).…”

Section: Photoacoustic Spectroscopymentioning

confidence: 99%

Detection of Greenhouse Gases Using the Photoacoustic Spectroscopy

Sthel¹,

Gomes²,

Lima³

et al. 2012

Greenhouse Gases - Emission, Measurement and Management

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Section: Photoacoustic Spectroscopymentioning

confidence: 99%

Detection of Greenhouse Gases Using the Photoacoustic Spectroscopy

Sthel¹,

Gomes²,

Lima³

et al. 2012

Greenhouse Gases - Emission, Measurement and Management

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“…Photoacoustic or optoacoustic effect (Bell 1880) is a result of an opto-thermal process where, under laser irradiation conditions of thermal and stress confinement, the absorption of light produces acoustic waves. The acoustic transients detected using an ultrasonic detector are used to form photoacoustic images depicting the spatial distribution of optical absorbers (Beard and Mills 1997;Emelianov et al 2004;Oraevsky and Karabutov 2003;Wang et al 2003).…”

Section: Introductionmentioning

confidence: 99%

Remote Temperature Estimation in Intravascular Photoacoustic Imaging

Sethuraman

Aglyamov

Smalling

et al. 2008

Ultrasound in Medicine & Biology

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Intravascular photoacoustic (IVPA) imaging is based on the detection of laser-induced acoustic waves generated within the arterial tissue under pulsed laser irradiation. Generally, laser radiant energy levels are kept low (20 mJ/cm 2 ) during photoacoustic imaging to conform to general standards for safe use of lasers on biological tissues. However, safety standards in intravascular photoacoustic imaging are not yet fully established. Consequently, monitoring spatio-temporal temperature changes associated with laser-tissue interaction is important to address thermal safety of IVPA imaging. In this study we utilize the IVUS based strain measurements to estimate the laser induced temperature increase. Temporal changes in temperature were estimated in a phantom modeling a vessel with an inclusion. A cross-correlation based time delay estimator was used to assess temperature induced strains produced by different laser radiant energies. The IVUS based remote measurements revealed temperature increases of 0.7±0.3°C, 2.9±0.2 °C and 5.0±0.2 °C, for the laser radiant energies of 30 mJ/cm 2 , 60 mJ/cm 2 and 85 mJ/cm 2 respectively. The technique was then used in imaging of ex vivo samples of a normal rabbit aorta. For arterial tissues, a temperature elevation of 1.1°C was observed for a laser fluence of 60 mJ/cm 2 and lesser than 1°C for lower energy levels normally associated with IVPA imaging. Therefore, the developed ultrasound technique can be used to monitor temperature during IVPA imaging. Furthermore, the analysis based on the Arrhenius thermal damage model indicates no thermal injury in the arterial tissue; suggesting the safety of IVPA imaging

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“…In 1880, Alexander Graham Bell discovered that pulsed light striking a solid substrate can produce a sound wave, a phenomenon called the photoacoustic effect (Bell, 1880). Practical imaging methods based on this effect have been developed and reported the last decade (Xu & Wang, 2006).…”

Section: Photoacoustic Imagingmentioning

confidence: 99%