Comparison with transient measurements of infrared radiation and stress wave for the practical ablation monitoring during photorefractive keratectomy

Miya Ishihara, Tsunenori Arai, Makoto Kikuchi, Hironori Nakano, Satoko Kawauchi, Minoru Obara

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We compared infrared radiation measurement with stress wave measurement for real-time ablation monitoring during photorefractive keratectomy (PRK). We estimated temperature elevation which may be one of the most effective parameter for PRK monitoring, because the ablation mechanism is mainly attributed to thermal kinetics. The temperature elevation of ablated cornea was evaluated by the infrared radiation and the stress wave. The thermal radiation from irradiated cornea was detected by a MCT detector. The measured signal increased sharply just after the laser irradiation and decreased quasi-exponentially. We could calculate the temperature elevation by observed signal using Stefan-Boltzmann radiation law. In the case of the gelatin gel (15%wt) ablation in vitro, the temperature elevation was 97deg. at 208mJ/cm2 in the laser fluence. We also measured transient stress wave by the acoustic transducer which was made by polyvinylidene fluoride (PVDF) film. The temperature elevation could be calculated from the peak stress amplitude based on the short pulsed laser ablation theory. The good agreement on the temperature elevation was obtained between the infrared and the stress based estimations. Due to non-contact and non-invasive method, our infrared measurements for temperature elevation monitoring may be available to accomplish the feedback control on the PRK.

Original languageEnglish
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
EditorsS.L. Jacques
Pages319-324
Number of pages6
Volume3254
DOIs
Publication statusPublished - 1998
Externally publishedYes
EventLaser-Tissue Interaction IX - San Jose, CA, United States
Duration: 1998 Jan 261998 Jan 28

Other

OtherLaser-Tissue Interaction IX
CountryUnited States
CitySan Jose, CA
Period98/1/2698/1/28

Fingerprint

stress waves
infrared radiation
Ablation
ablation
Infrared radiation
Monitoring
cornea
Temperature
temperature
Stefan-Boltzmann law
radiation laws
Acoustic transducers
radiation measurement
gelatins
Heat radiation
thermal radiation
Laser ablation
Laser beam effects
vinylidene
Pulsed lasers

Keywords

  • Ablation
  • ArF excimer laser
  • Photorefractive keratectomy(PRK)
  • Temperature

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

Cite this

Ishihara, M., Arai, T., Kikuchi, M., Nakano, H., Kawauchi, S., & Obara, M. (1998). Comparison with transient measurements of infrared radiation and stress wave for the practical ablation monitoring during photorefractive keratectomy. In S. L. Jacques (Ed.), Proceedings of SPIE - The International Society for Optical Engineering (Vol. 3254, pp. 319-324) https://doi.org/10.1117/12.308179

Comparison with transient measurements of infrared radiation and stress wave for the practical ablation monitoring during photorefractive keratectomy. / Ishihara, Miya; Arai, Tsunenori; Kikuchi, Makoto; Nakano, Hironori; Kawauchi, Satoko; Obara, Minoru.

Proceedings of SPIE - The International Society for Optical Engineering. ed. / S.L. Jacques. Vol. 3254 1998. p. 319-324.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Ishihara, M, Arai, T, Kikuchi, M, Nakano, H, Kawauchi, S & Obara, M 1998, Comparison with transient measurements of infrared radiation and stress wave for the practical ablation monitoring during photorefractive keratectomy. in SL Jacques (ed.), Proceedings of SPIE - The International Society for Optical Engineering. vol. 3254, pp. 319-324, Laser-Tissue Interaction IX, San Jose, CA, United States, 98/1/26. https://doi.org/10.1117/12.308179
Ishihara M, Arai T, Kikuchi M, Nakano H, Kawauchi S, Obara M. Comparison with transient measurements of infrared radiation and stress wave for the practical ablation monitoring during photorefractive keratectomy. In Jacques SL, editor, Proceedings of SPIE - The International Society for Optical Engineering. Vol. 3254. 1998. p. 319-324 https://doi.org/10.1117/12.308179
Ishihara, Miya ; Arai, Tsunenori ; Kikuchi, Makoto ; Nakano, Hironori ; Kawauchi, Satoko ; Obara, Minoru. / Comparison with transient measurements of infrared radiation and stress wave for the practical ablation monitoring during photorefractive keratectomy. Proceedings of SPIE - The International Society for Optical Engineering. editor / S.L. Jacques. Vol. 3254 1998. pp. 319-324
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