Absorption characteristics evaluation from pulsed photo-thermal radiometry in the determination of lung air-leak integrity by vital staining

Hisako Tokunaga, Maya Gotoh, Yasunobu Oka, Tsunenori Arai

研究成果: Conference contribution

抄録

We evaluated the absorption characteristics of the lung surface with vital staining non-invasively by means of pulsed photo thermal radiometry (PPTR) to improve the success rate of laser air leak sealing from the lung. To seal the air leak after lung resection, we investigated laser treatment using diode laser irradiation (wavelength: 810nm) and vital staining with Indocyanine green (ICG, absorption peak wavelength: 805nm). We used μa√α and defined as A (μa: the absorption coefficient, α: the thermal diffusivity) in the approximate PPTR theory to analyze the PPTR signal as it was assumed the thermal diffusivity coefficient would be a constant when the lung collapsed during surgery. The accuracy of the constructed PPTR system with this assumption was A=±0.15s-1/2. In ex vivo studies, the measured A variation due to vital staining was 3.7s-1/2. This range was sufficiently large measured against the accuracy. We monitored the condition of the lung surface during continuous diode laser irradiation with our PPTR system. We successfully measured the absorption characteristic changes during laser irradiation. We believe this constructed PPTR system might be useful in improving the success rate of laser sealing with vital staining while arranging the laser energy by the value of A.

本文言語English
ホスト出版物のタイトル29th Annual International Conference of IEEE-EMBS, Engineering in Medicine and Biology Society, EMBC'07
ページ1070-1073
ページ数4
DOI
出版ステータスPublished - 2007
外部発表はい
イベント29th Annual International Conference of IEEE-EMBS, Engineering in Medicine and Biology Society, EMBC'07 - Lyon, France
継続期間: 2007 8月 232007 8月 26

出版物シリーズ

名前Annual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings
ISSN(印刷版)0589-1019

Other

Other29th Annual International Conference of IEEE-EMBS, Engineering in Medicine and Biology Society, EMBC'07
国/地域France
CityLyon
Period07/8/2307/8/26

ASJC Scopus subject areas

  • 信号処理
  • 生体医工学
  • コンピュータ ビジョンおよびパターン認識
  • 健康情報学

フィンガープリント

「Absorption characteristics evaluation from pulsed photo-thermal radiometry in the determination of lung air-leak integrity by vital staining」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル