✦ LIBER ✦

Photodynamic therapy/Oncology

Publisher: John Wiley and Sons
Year: 2004
Tongue: English
Weight: 83 KB
Volume: 34
Category: Article
ISSN: 0196-8092
DOI: 10.1002/lsm.20053

No coin nor oath required. For personal study only.

✦ Synopsis

Background and Objectives: Light-emitting diode (LED), smaller and less expensive, requires less power than laser does, is more and more used to be irradiation source for photobiomodulation on cells. Three new LED systems with different intensity have been designed in this article. Study Design/Materials and Methods: The three LED systems consist of a set of lens to expand the beam of light or/and to focus the rays of light, and an array of LEDs set in the sphere connected with Fresnel lens. Their intensity were measured and their experimental formulae for calculating intensity were obtained by SPSS.

Results: The intensity of the three LED systems ranges from: 0.002 to 1.465 W/cm 2 with the spot diameter 40 mm; 0.358 to 11.229 W/cm 2 with the spot diameter 60 mm; 17.626 to 115.371 W/ cm 2 with the spot diameter 80 mm. Their intensity distributions are all uniformity. The LED systems have been used to study photobiomodulation on cells. Conclusions: The LED systems are effective for photobiomodulation on cells.

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