EP0604931A2
Expired / Lapsed
EP
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Medical laser apparatus and diagnosing/curing apparatus using the medical laser apparatus
Assignee: Panasonic Holdings Corp
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Filing: 1993-12-24
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Granted: —
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Expires: 2013-12-24
Abstract
Abstract The diagnosing/curing apparatus is provided with a medical laser apparatus (21) using a semiconductor laser as a light source which generates the laser light of the narrow full width at half maximum with the variable oscillating wavelength, a light transmission line (22) for guiding an irradiating laser light (3a) projected from the medical laser apparatus (21) to the vicinity of a focus (5), an image transmission line (23) for observing the focus (5) and the periphery thereof, a fluorescence separating device (27) for separating only the fluorescence emitted from a photosensitizer excited by the irradiating laser light (3a), an image-picking-up/analyzing device (25) for picking up and analyzing an image of fluorescence obtained by the fluorescence separating device and an image displaying device (26) for displaying the analyzing result.
Inventors
- 👤 Katsuo Aizawa
- 👤 Yoshiteru Ii
- 👤 Akira Kaneda
- 👤 Takayoshi Yuzu
- 👤 Toshiyoshi Yamamoto
- 👤 Harubumi Kato
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-25 01:24
CPC Classifications
A; A61; A61N; A61N5/00; A61N5/06; A61N5/0613; A61N5/062; A61N5/067; A61N2005/0635; A61N2005/0643; A61N2005/0644
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
109 words
A medical laser apparatus designed to diagnose or cure a focus by irradiating light from a light source to the focus where a photosensitizer (6) having affinity to the focus has been preliminarily accumulated thereby to excite the photosensitizer, the apparatus comprising: a laser (1) as the light source which is capable of controlling oscillating wavelength and which has a full width at half maximum which is narrower than a width of a band, where an energy absorption of the photosensitizer is equal to or more than 90% of the maximal value in the vicinity of the oscillating wavelength; and a wavelength controlling means (8) for controlling the laser.
Claim 2
Dependent Claim
16 words
The medical laser apparatus as claimed in claim 1, wherein the laser is a semiconductor laser.
Claim 3
Dependent Claim
27 words
The medical laser apparatus as claimed in claim 2, wherein the wavelength controlling means is a temperature controlling device to control a temperature of the semiconductor laser.
Claim 4
Dependent Claim
52 words
The medical laser apparatus as claimed in claim 3, further comprising a wavelength detecting means (9) for detecting the wavelength of the laser light projected from the semiconductor laser, whereby the temperature of the semiconductor laser is controlled based on a detecting result of the wavelength detecting means by the controlling means.
Claim 5
Dependent Claim
42 words
The medical laser apparatus as claimed in claim 3, which is provided with a memory means for storing relationship between the temperature and the wavelength of the semiconductor laser, whereby the temperature of the semiconductor laser is controlled based on the relationship.
Claim 6
Dependent Claim
19 words
The medical laser apparatus as claimed in claim 1, wherein the laser is an external resonating type semiconductor laser.
Claim 7
Dependent Claim
64 words
The medical laser apparatus as claimed in any one of claims 3 through 6, further comprising a control means (7) for deciding whether or not one of a value of the wavelength and the wavelength of the laser light projected from the semiconductor laser conforms to a wavelength controlling condition, and a wavelength displaying means (10) for displaying decision outputted from the control means.
Claim 8
Dependent Claim
87 words
The medical laser apparatus as claimed in any one of claims 3 through 6, further comprising a control means (7) for deciding whether or not one of a value of the wavelength and the wavelength of the laser light projected from the semiconductor laser conforms to a wavelength controlling condition, and an automatic irradiation stopping means (7, 11) for controlling not to irradiate the laser light when the wavelength of the laser light projected from the semiconductor laser is not in conformity with a wavelength controlling condition.
Claim 9
Dependent Claim
41 words
The medical laser apparatus as claimed in any one of claims 1 through 8, wherein the photosensitizer having affinity to the focus is a chlorin photosensitizer, and in which the wavelength of the laser light is varied and controlled within 664±5nm.
Claim 10
Dependent Claim
41 words
The medical laser apparatus as claimed in any one of claims 1 through 8, wherein the photosensitizer having affinity to the focus is a pheophorbide photosensitizer, and in which the wavelength of the laser light is varied and controlled within 650±10nm.
Claim 11
Dependent Claim
191 words
A diagnosing/curing apparatus designed to diagnose or cure a focus by irradiating light from a light source to the focus where a photosensitizer (6) having affinity to the focus has been preliminarily accumulated thereby to excite the photosensitizer, the diagnosing/curing apparatus comprising: a medical laser apparatus which comprises a laser as the light source which is capable of controlling oscillating wavelength and which has a full width at half maximum which is narrower than a width of a band, where an energy absorption of the photosensitizer is equal to or more than 90% of the maximal value in the vicinity of the oscillating wavelength, and a wavelength controlling means for controlling the laser; a light transmission line (22) for guiding the laser light projected from the medical laser apparatus to the vicinity of the focus; an image transmission line (23) for guiding fluorescence emitted from the photosensitizer excited by the laser light to observe the focus and a periphery thereof; a fluorescence separating means (27) for separating only the fluorescence; and an image-picking-up/analyzing means (25) for picking up and analyzing an image of the fluorescence obtained by the fluorescence separating means.
Claim 12
Dependent Claim
48 words
The diagnosing/curing apparatus as claimed in claim 11, further comprising an image displaying means (26) for displaying an analyzed result of the image of fluorescence obtained by the image-picking-up/analyzing means, so that the image of fluorescence is displayed by the image displaying means during treatment of the focus.
Claim 13
Dependent Claim
34 words
The diagnosing/curing apparatus as claimed in any one of claims 11 and 12, wherein the fluorescence separating means is a band-pass filter allowing the fluorescence to pass therethrough and shutting the irradiating laser light.
Claim 14
Dependent Claim
66 words
The diagnosing/curing apparatus as claimed in any one of claims 11, 12, and 13, wherein the wavelength controlling means shifts the wavelength of the laser light away from a wavelength of the fluorescence emitted from the photosensitizer within an absorption band of the photosensitizer at the treatment of the focus concurrently performed with diagnosis of the focus with the use of the displayed image of fluorescence.
Claim 15
Dependent Claim
53 words
A diagnosing/curing apparatus as claimed in claim 14, wherein the photosensitizer having affinity to the focus is a chlorin photosensitizer, and in which the wavelength of the laser light is varied and controlled within 664±5nm, and the band-pass filter is a band-pass filter which passes the wavelength 670nm and shuts the wavelength 660nm.
Claim 16
Dependent Claim
53 words
A diagnosing/curing apparatus as claimed in claim 14, wherein the photosensitizer having affinity to the focus is a pheophorbide photosensitizer, and in which the wavelength of the laser light is varied and controlled within 650±10nm, and the band-pass filter is a band-pass filter which passes the wavelength 654nm and shuts the wavelength 644nm.
References Cited (Backward Citations)
No citation records indexed.
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