Apparatus for the photodynamic therapy treatment
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United States of America Patent
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Sep 6, 1994
Grant Date -
N/A
app pub date -
Dec 21, 1992
filing date -
Dec 29, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The invention relates to an apparatus for an efficient photodynamic therapy treatment. The apparatus comprises the following parts: (a) a lamp possessing a narrow beam light with half angle divergence up to 10.degree., possessing an intensity of at least 2 mW/nm with a spectral region in the range of 610 to 750 nm; (b) a glass lens to focus the beams of the light; (c) a red filter possessing a transmittance of 0.95 which provides a spectral region of above 610 nm, and (c) a light guide in the range of 3 to 12 mm diameter, which provides a minimum irradiance of 50 mW/cm.sup.2. According to a preferred embodiment the lamp is provided with a fixed internal reflector. In order to transmit the useful radiation and to remove the heat produced by the infra-red radiation, a 45.degree. dicroic mirror is attached to the apparatus.
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