Discrimination between urinary tract tissue and urinary stones by fiber optic pulsed photo-thermal radiometry method in vivo

Yuichiro Daidoh, Tsunenori Arai, Akira Suda, Makoto Kikuchi, Yukikuni Komine, Masaru Murai, Hiroshi Nakamura

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

Abstract

To minimize urotherial tissue injuries by false laser irradiation during the laser stones fragmentation, we developed a novel fiber-optic analytical system which was able to distinguish urotherial tissues from urinary stones in vivo. This system was composed of the fiber-optic pulsed photo-thermal radiometry (PPTR) system together with a thin-fiber endoscope. The ultraviolet Ar laser was employed as the excitation light source. The catheter of this system was 6F in diameter and consisted of SiO2 glass fiber (400μmφ) as an excitation line, an As-S glass fiber (400μmφ) as a detection line, and a thin-fiber endoscope (610μmφ). A urinary stone was introduced into the canine ureter under general anesthesia. The catheter system was inserted through an opening of the ureter distal to the stone. The e-folding decay time of the PPTR waveform of which optical and/or thermal properties of the tissues and stones were characterized was measured in vivo. The e-folding decay times were significantly different between urinary stones and the canine ureter. These results suggest that the fiber-optic PPTR analysis might be significantly useful procedure to prevent urotherial tissue from false irradiation injuries in clinical laser stone fragmentation.

Original languageEnglish
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
EditorsGrahm M Watson, Rudolf W. Steiner, Joseph J. Pietrafitta
PublisherPubl by Int Soc for Optical Engineering
Pages120-123
Number of pages4
Volume1421
Publication statusPublished - 1991
Externally publishedYes
EventProceedings of Lasers in Urology, Laparoscopy, and General Surgery - Los Angeles, CA, USA
Duration: 1991 Jan 211991 Jan 23

Other

OtherProceedings of Lasers in Urology, Laparoscopy, and General Surgery
CityLos Angeles, CA, USA
Period91/1/2191/1/23

Fingerprint

Radiometry
Fiber optics
discrimination
fiber optics
rocks
Tissue
Endoscopy
Catheters
Glass fibers
endoscopes
Ultraviolet lasers
glass fibers
Fibers
Lasers
folding
Laser beam effects
fragmentation
Light sources
S glass
Thermodynamic properties

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

Cite this

Daidoh, Y., Arai, T., Suda, A., Kikuchi, M., Komine, Y., Murai, M., & Nakamura, H. (1991). Discrimination between urinary tract tissue and urinary stones by fiber optic pulsed photo-thermal radiometry method in vivo. In G. M. Watson, R. W. Steiner, & J. J. Pietrafitta (Eds.), Proceedings of SPIE - The International Society for Optical Engineering (Vol. 1421, pp. 120-123). Publ by Int Soc for Optical Engineering.

Discrimination between urinary tract tissue and urinary stones by fiber optic pulsed photo-thermal radiometry method in vivo. / Daidoh, Yuichiro; Arai, Tsunenori; Suda, Akira; Kikuchi, Makoto; Komine, Yukikuni; Murai, Masaru; Nakamura, Hiroshi.

Proceedings of SPIE - The International Society for Optical Engineering. ed. / Grahm M Watson; Rudolf W. Steiner; Joseph J. Pietrafitta. Vol. 1421 Publ by Int Soc for Optical Engineering, 1991. p. 120-123.

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

Daidoh, Y, Arai, T, Suda, A, Kikuchi, M, Komine, Y, Murai, M & Nakamura, H 1991, Discrimination between urinary tract tissue and urinary stones by fiber optic pulsed photo-thermal radiometry method in vivo. in GM Watson, RW Steiner & JJ Pietrafitta (eds), Proceedings of SPIE - The International Society for Optical Engineering. vol. 1421, Publ by Int Soc for Optical Engineering, pp. 120-123, Proceedings of Lasers in Urology, Laparoscopy, and General Surgery, Los Angeles, CA, USA, 91/1/21.
Daidoh Y, Arai T, Suda A, Kikuchi M, Komine Y, Murai M et al. Discrimination between urinary tract tissue and urinary stones by fiber optic pulsed photo-thermal radiometry method in vivo. In Watson GM, Steiner RW, Pietrafitta JJ, editors, Proceedings of SPIE - The International Society for Optical Engineering. Vol. 1421. Publ by Int Soc for Optical Engineering. 1991. p. 120-123
Daidoh, Yuichiro ; Arai, Tsunenori ; Suda, Akira ; Kikuchi, Makoto ; Komine, Yukikuni ; Murai, Masaru ; Nakamura, Hiroshi. / Discrimination between urinary tract tissue and urinary stones by fiber optic pulsed photo-thermal radiometry method in vivo. Proceedings of SPIE - The International Society for Optical Engineering. editor / Grahm M Watson ; Rudolf W. Steiner ; Joseph J. Pietrafitta. Vol. 1421 Publ by Int Soc for Optical Engineering, 1991. pp. 120-123
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