Indocyanine green enhanced diode laser ablation for porcine gastric wall with ablation depth monitoring using scattering light

Tsunenori Arai, Takuya Hayashi, Naoko Nakamura, Shoryoku Hino, Makoto Kikuchi, Sohichiro Miura, Hiroaki Suzuki, Hisao Tajiri

Research output: Contribution to journalConference article

4 Citations (Scopus)

Abstract

We developed laser ablation depth monitoring using scattering light on indocyanine green (ICG) enhanced diode laser ablation for gastric wall. We have developed selective diode laser ablation for ICG stained submucosa to treat submucosal gastric cancer. To prevent gastric perforation, realtime ablation depth monitoring should be applied to this treatment in spite of the ablation depth can be roughly judged through gastric endoscope by ablation surface color change. The back scattered light spectrum of the diode laser from the ablation area may be influenced by surface absorption and plume absorption. We observed the scattering light spectrum and found small spectral dip at ICG absorption wavelength. We demonstrated that this dip depth was corresponded to the remained ICG stained submucosal layer thickness. We concluded that this simple spectral monitoring may be effective to prevent gastric perforation during ICG enhanced diode laser ablation therapy.

Original languageEnglish
Pages (from-to)1900-1901
Number of pages2
JournalAnnual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings
Volume4
Publication statusPublished - 1998 Dec 1
EventProceedings of the 1998 20th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. Part 4 (of 6) - Hong Kong, China
Duration: 1998 Oct 291998 Nov 1

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ASJC Scopus subject areas

  • Signal Processing
  • Biomedical Engineering
  • Computer Vision and Pattern Recognition
  • Health Informatics

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