Real-time optoacoustic monitoring of temperature in tissues

Rinat Esenaliev, Alexander A. Oraevsky, Kirill V. Larin, Irina V. Larina, Massoud Motamedi

Research output: Chapter in Book/Report/Conference proceedingChapter

25 Citations (Scopus)

Abstract

There is a need to monitor tissue temperature and optical properties during thermotherapy in real time in order to control the boundaries of hyperthermia or coagulation of diseased tissues and minimize the damage to surrounding normal tissues. We propose to use optoacoustic technique for monitoring of tissue temperature. Efficiency of thermoacoustic excitation in water is dependent on temperature. Therefore, the optoacoustic technique may be utilized to monitor tissue temperature if the efficiency of thermoacoustic excitation in tissue is temperature-dependent. We performed experiments on real-time optoacoustic monitoring of temperature in freshly excised canine tissues (liver and myocardium) and aqueous solution during conductive heating. Laser-induced optoacoustic pressure signals were recorded from tissues and the aqueous solution during heating with the use of sensitive wide-band acoustic transducers. Fundamental harmonic of Q-switched Nd:YAG lasers were used for pressure wave generation. Amplitude of the optoacoustic pressure induced in tissues increased linearly with temperature. Good agreement was obtained between the experimental data and theory for the aqueous solution. We demonstrated that laser optoacoustic technique is capable of measuring 1-2 °C temperature change in tissue and at the distance of up to several centimeters between the investigated tissue volume and the transducer.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
PublisherSociety of Photo-Optical Instrumentation Engineers
Pages268-275
Number of pages8
Volume3601
StatePublished - 1999
EventProceedings of the 1999 Laser-Tissue Interaction X: Photochemical, Photothermal, and Photomechanical - San Jose, CA, USA
Duration: Jan 24 1999Jan 27 1999

Other

OtherProceedings of the 1999 Laser-Tissue Interaction X: Photochemical, Photothermal, and Photomechanical
CitySan Jose, CA, USA
Period1/24/991/27/99

Fingerprint

Photoacoustic effect
Tissue
Monitoring
Temperature
temperature
Thermoacoustics
aqueous solutions
Lasers
transducers
Acoustic transducers
Heating
myocardium
heating
hyperthermia
wave generation
Q switched lasers
coagulation
Coagulation
liver
elastic waves

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

Cite this

Esenaliev, R., Oraevsky, A. A., Larin, K. V., Larina, I. V., & Motamedi, M. (1999). Real-time optoacoustic monitoring of temperature in tissues. In Proceedings of SPIE - The International Society for Optical Engineering (Vol. 3601, pp. 268-275). Society of Photo-Optical Instrumentation Engineers.

Real-time optoacoustic monitoring of temperature in tissues. / Esenaliev, Rinat; Oraevsky, Alexander A.; Larin, Kirill V.; Larina, Irina V.; Motamedi, Massoud.

Proceedings of SPIE - The International Society for Optical Engineering. Vol. 3601 Society of Photo-Optical Instrumentation Engineers, 1999. p. 268-275.

Research output: Chapter in Book/Report/Conference proceedingChapter

Esenaliev, R, Oraevsky, AA, Larin, KV, Larina, IV & Motamedi, M 1999, Real-time optoacoustic monitoring of temperature in tissues. in Proceedings of SPIE - The International Society for Optical Engineering. vol. 3601, Society of Photo-Optical Instrumentation Engineers, pp. 268-275, Proceedings of the 1999 Laser-Tissue Interaction X: Photochemical, Photothermal, and Photomechanical, San Jose, CA, USA, 1/24/99.
Esenaliev R, Oraevsky AA, Larin KV, Larina IV, Motamedi M. Real-time optoacoustic monitoring of temperature in tissues. In Proceedings of SPIE - The International Society for Optical Engineering. Vol. 3601. Society of Photo-Optical Instrumentation Engineers. 1999. p. 268-275
Esenaliev, Rinat ; Oraevsky, Alexander A. ; Larin, Kirill V. ; Larina, Irina V. ; Motamedi, Massoud. / Real-time optoacoustic monitoring of temperature in tissues. Proceedings of SPIE - The International Society for Optical Engineering. Vol. 3601 Society of Photo-Optical Instrumentation Engineers, 1999. pp. 268-275
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