Laser system for providing target specific energy deposition and damage
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United States of America Patent
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-
Mar 29, 1988
Issued Date -
N/A
app pub date -
Dec 10, 1986
filing date -
Aug 7, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A hand piece for use with a laser includes a scanning mechanism which controls dosimetry of radiation applied to a target area which is adjustable to limit thermal diffusion from the light absorbing portion of the irradiated target site for selective target specific energy deposition. When used for dermatologic purposes, the adjustable scanning mechanism permits radiation to impinge on tissue for a predetermined period of time for the selective necrosis of highly-filled blood vessels, while leaving adjacent tissue and empty blood vessels undamaged. The dwell time of the laser beam is designed to match the diffusion time for thermal destruction of the wall of the abnormal vessel, with the dwell time adjusted by the scanning rate.
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