Influence of optical absorption on urinary calculus threshold fluence and ablation efficiency during infrared laser ablation

Kin Foong Chan, Daniel X. Hammer, Bernard Choi, Gracie Vargas, Brian Sorg, T. Joshua Pfefer, Joel M H Teichman, H. Stan McGuff, Hans Pratisto, E. Duco Jansen, A. J. Welch

Research output: Chapter in Book/Report/Conference proceedingChapter

1 Citation (Scopus)

Abstract

The objectives of this study were to determine if the optical absorption properties of urinary calculi affect the threshold fluence for ablation or fragmentation and the ablation efficiency due to laser irradiation. The Vanderbilt free electron laser (FEL) was tuned to selected wavelengths based on the absorption spectrum of various types of urinary calculi. The threshold fluences for ablation of the calculi were measured at different wavelengths. A preliminary study of the ablation efficiency (ablation depth per unit incidence fluence) was performed. The results were found to be in agreement with a thermal ablation model for which the threshold fluences were proportional to 1/μ a. The ablation efficiencies were higher in regions of the infrared spectra in which absorption was higher. For a fixed laser irradiation, the lower threshold fluences within regions of high optical absorption allowed more energy to enhance calculus ablation. This study provided insight into determining the optimum wavelengths for ablation and laser lithotripsy.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
PublisherSPIE
Pages60-68
Number of pages9
Volume3925
StatePublished - 2000
Externally publishedYes
EventBiomedical Applications of Free-Electron Lasers - San Jose, CA, USA
Duration: Jan 22 2000Jan 22 2000

Other

OtherBiomedical Applications of Free-Electron Lasers
CitySan Jose, CA, USA
Period1/22/001/22/00

Fingerprint

calculi
Infrared lasers
Laser ablation
Ablation
infrared lasers
Light absorption
laser ablation
ablation
fluence
optical absorption
thresholds
Laser beam effects
Wavelength
wavelengths
lasers
irradiation
Free electron lasers
calculus
free electron lasers
Absorption spectra

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

Cite this

Chan, K. F., Hammer, D. X., Choi, B., Vargas, G., Sorg, B., Pfefer, T. J., ... Welch, A. J. (2000). Influence of optical absorption on urinary calculus threshold fluence and ablation efficiency during infrared laser ablation. In Proceedings of SPIE - The International Society for Optical Engineering (Vol. 3925, pp. 60-68). SPIE.

Influence of optical absorption on urinary calculus threshold fluence and ablation efficiency during infrared laser ablation. / Chan, Kin Foong; Hammer, Daniel X.; Choi, Bernard; Vargas, Gracie; Sorg, Brian; Pfefer, T. Joshua; Teichman, Joel M H; McGuff, H. Stan; Pratisto, Hans; Jansen, E. Duco; Welch, A. J.

Proceedings of SPIE - The International Society for Optical Engineering. Vol. 3925 SPIE, 2000. p. 60-68.

Research output: Chapter in Book/Report/Conference proceedingChapter

Chan, KF, Hammer, DX, Choi, B, Vargas, G, Sorg, B, Pfefer, TJ, Teichman, JMH, McGuff, HS, Pratisto, H, Jansen, ED & Welch, AJ 2000, Influence of optical absorption on urinary calculus threshold fluence and ablation efficiency during infrared laser ablation. in Proceedings of SPIE - The International Society for Optical Engineering. vol. 3925, SPIE, pp. 60-68, Biomedical Applications of Free-Electron Lasers, San Jose, CA, USA, 1/22/00.
Chan KF, Hammer DX, Choi B, Vargas G, Sorg B, Pfefer TJ et al. Influence of optical absorption on urinary calculus threshold fluence and ablation efficiency during infrared laser ablation. In Proceedings of SPIE - The International Society for Optical Engineering. Vol. 3925. SPIE. 2000. p. 60-68
Chan, Kin Foong ; Hammer, Daniel X. ; Choi, Bernard ; Vargas, Gracie ; Sorg, Brian ; Pfefer, T. Joshua ; Teichman, Joel M H ; McGuff, H. Stan ; Pratisto, Hans ; Jansen, E. Duco ; Welch, A. J. / Influence of optical absorption on urinary calculus threshold fluence and ablation efficiency during infrared laser ablation. Proceedings of SPIE - The International Society for Optical Engineering. Vol. 3925 SPIE, 2000. pp. 60-68
@inbook{af28f7eafbb447d594e38ce309d9fdd2,
title = "Influence of optical absorption on urinary calculus threshold fluence and ablation efficiency during infrared laser ablation",
abstract = "The objectives of this study were to determine if the optical absorption properties of urinary calculi affect the threshold fluence for ablation or fragmentation and the ablation efficiency due to laser irradiation. The Vanderbilt free electron laser (FEL) was tuned to selected wavelengths based on the absorption spectrum of various types of urinary calculi. The threshold fluences for ablation of the calculi were measured at different wavelengths. A preliminary study of the ablation efficiency (ablation depth per unit incidence fluence) was performed. The results were found to be in agreement with a thermal ablation model for which the threshold fluences were proportional to 1/μ a. The ablation efficiencies were higher in regions of the infrared spectra in which absorption was higher. For a fixed laser irradiation, the lower threshold fluences within regions of high optical absorption allowed more energy to enhance calculus ablation. This study provided insight into determining the optimum wavelengths for ablation and laser lithotripsy.",
author = "Chan, {Kin Foong} and Hammer, {Daniel X.} and Bernard Choi and Gracie Vargas and Brian Sorg and Pfefer, {T. Joshua} and Teichman, {Joel M H} and McGuff, {H. Stan} and Hans Pratisto and Jansen, {E. Duco} and Welch, {A. J.}",
year = "2000",
language = "English (US)",
volume = "3925",
pages = "60--68",
booktitle = "Proceedings of SPIE - The International Society for Optical Engineering",
publisher = "SPIE",

}

TY - CHAP

T1 - Influence of optical absorption on urinary calculus threshold fluence and ablation efficiency during infrared laser ablation

AU - Chan, Kin Foong

AU - Hammer, Daniel X.

AU - Choi, Bernard

AU - Vargas, Gracie

AU - Sorg, Brian

AU - Pfefer, T. Joshua

AU - Teichman, Joel M H

AU - McGuff, H. Stan

AU - Pratisto, Hans

AU - Jansen, E. Duco

AU - Welch, A. J.

PY - 2000

Y1 - 2000

N2 - The objectives of this study were to determine if the optical absorption properties of urinary calculi affect the threshold fluence for ablation or fragmentation and the ablation efficiency due to laser irradiation. The Vanderbilt free electron laser (FEL) was tuned to selected wavelengths based on the absorption spectrum of various types of urinary calculi. The threshold fluences for ablation of the calculi were measured at different wavelengths. A preliminary study of the ablation efficiency (ablation depth per unit incidence fluence) was performed. The results were found to be in agreement with a thermal ablation model for which the threshold fluences were proportional to 1/μ a. The ablation efficiencies were higher in regions of the infrared spectra in which absorption was higher. For a fixed laser irradiation, the lower threshold fluences within regions of high optical absorption allowed more energy to enhance calculus ablation. This study provided insight into determining the optimum wavelengths for ablation and laser lithotripsy.

AB - The objectives of this study were to determine if the optical absorption properties of urinary calculi affect the threshold fluence for ablation or fragmentation and the ablation efficiency due to laser irradiation. The Vanderbilt free electron laser (FEL) was tuned to selected wavelengths based on the absorption spectrum of various types of urinary calculi. The threshold fluences for ablation of the calculi were measured at different wavelengths. A preliminary study of the ablation efficiency (ablation depth per unit incidence fluence) was performed. The results were found to be in agreement with a thermal ablation model for which the threshold fluences were proportional to 1/μ a. The ablation efficiencies were higher in regions of the infrared spectra in which absorption was higher. For a fixed laser irradiation, the lower threshold fluences within regions of high optical absorption allowed more energy to enhance calculus ablation. This study provided insight into determining the optimum wavelengths for ablation and laser lithotripsy.

UR - http://www.scopus.com/inward/record.url?scp=0033702141&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0033702141&partnerID=8YFLogxK

M3 - Chapter

VL - 3925

SP - 60

EP - 68

BT - Proceedings of SPIE - The International Society for Optical Engineering

PB - SPIE

ER -