Interstitial laser-induced thermotherapy: Influence of carbonization on lesion size
(1998) In Lasers in Surgery and Medicine 22(1). p.51-57- Abstract
- Background and Objective: The size of laser-induced coagulated lesions produced in porcine muscle in vitro using a cylindrical diffusing fiber tip and a conductive heat source, made by covering the diffuser with a hollow steel needle, were compared to investigate the influence of charring. Materials and methods: Light from a Nd: YAG laser was utilized for thermotherapy. A theoretical model for calculating tissue temperature was used to predict the experimental results and to simulate in vivo treatments. Results: The metal-covered tip produced carbonization and tissue vaporization that was not found with the diffuser. After 20 min of irradiation at a laser power of 7 W, the coagulated volumes with and without carbonization were found to be... (More)
- Background and Objective: The size of laser-induced coagulated lesions produced in porcine muscle in vitro using a cylindrical diffusing fiber tip and a conductive heat source, made by covering the diffuser with a hollow steel needle, were compared to investigate the influence of charring. Materials and methods: Light from a Nd: YAG laser was utilized for thermotherapy. A theoretical model for calculating tissue temperature was used to predict the experimental results and to simulate in vivo treatments. Results: The metal-covered tip produced carbonization and tissue vaporization that was not found with the diffuser. After 20 min of irradiation at a laser power of 7 W, the coagulated volumes with and without carbonization were found to be 13.1 cm(3) (range 12.4-14.1 cm(3), n = 4) and 12.2 cm(3) (range 11.5-13.4 cm(3), n = 4), respectively. Mathematical simulations showed that in unperfused tissue, a diffusing laser heat source produces smaller lesions than does a conductive heat source at the same power, the difference in coagulated volume becoming smaller with increased treatment time and increased power. Conclusion: Using cylindrical diffusers, interstitial laser-induced thermotherapy without carbonization at the fiber tip can be as efficient as treatment with carbonization. (C) 1998 Wiley-Liss, Inc. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/2259426
- author
- Sturesson, C
- publishing date
- 1998
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Lasers in Surgery and Medicine
- volume
- 22
- issue
- 1
- pages
- 51 - 57
- publisher
- John Wiley & Sons Inc.
- external identifiers
-
- scopus:0031973929
- ISSN
- 0196-8092
- DOI
- 10.1002/(SICI)1096-9101(1998)22:1<51::AID-LSM12>3.0.CO;2-B
- language
- English
- LU publication?
- no
- id
- df3975a1-6b8f-4d2d-818e-062513426b6d (old id 2259426)
- date added to LUP
- 2016-04-04 09:11:31
- date last changed
- 2022-03-07 23:32:36
@article{df3975a1-6b8f-4d2d-818e-062513426b6d,
abstract = {{Background and Objective: The size of laser-induced coagulated lesions produced in porcine muscle in vitro using a cylindrical diffusing fiber tip and a conductive heat source, made by covering the diffuser with a hollow steel needle, were compared to investigate the influence of charring. Materials and methods: Light from a Nd: YAG laser was utilized for thermotherapy. A theoretical model for calculating tissue temperature was used to predict the experimental results and to simulate in vivo treatments. Results: The metal-covered tip produced carbonization and tissue vaporization that was not found with the diffuser. After 20 min of irradiation at a laser power of 7 W, the coagulated volumes with and without carbonization were found to be 13.1 cm(3) (range 12.4-14.1 cm(3), n = 4) and 12.2 cm(3) (range 11.5-13.4 cm(3), n = 4), respectively. Mathematical simulations showed that in unperfused tissue, a diffusing laser heat source produces smaller lesions than does a conductive heat source at the same power, the difference in coagulated volume becoming smaller with increased treatment time and increased power. Conclusion: Using cylindrical diffusers, interstitial laser-induced thermotherapy without carbonization at the fiber tip can be as efficient as treatment with carbonization. (C) 1998 Wiley-Liss, Inc.}},
author = {{Sturesson, C}},
issn = {{0196-8092}},
language = {{eng}},
number = {{1}},
pages = {{51--57}},
publisher = {{John Wiley & Sons Inc.}},
series = {{Lasers in Surgery and Medicine}},
title = {{Interstitial laser-induced thermotherapy: Influence of carbonization on lesion size}},
url = {{https://lup.lub.lu.se/search/files/5256660/2297603.pdf}},
doi = {{10.1002/(SICI)1096-9101(1998)22:1<51::AID-LSM12>3.0.CO;2-B}},
volume = {{22}},
year = {{1998}},
}