EP0266038A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Apparatus for treatment of cancer with photodiode
Assignee: Kureha Corp
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Filing: 1987-08-28
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Granted: —
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Expires: 2007-08-28
Abstract
Abstract Apparatus for the treatment of a cancerous lesion part having absorbed and accumulated in advance therein a photosensitive substance with an affinity for tumors by irradiating a light energy from a light source to the cancerous lesion part comprising one or more first photodiodes (3a) adapted to excite the photosensitive substance from the ground state thereof to a singlet state of higher energy level and one or more second photodiodes (3b) adapted to exite an energy level of the photosensitive substance which has transited from the singlet state to a triplet state to a still higher energy level.
Inventors
- 👤 Yoshio Kawai
- 👤 Kazue Endo
- 👤 Makoto Yoshimura
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 14:36
CPC Classifications
A; A61; A61B; A61B18/00; A61B18/18; A61B18/20; A61B18/22; A61B18/24; A61N; A61N5/00; A61N5/06; A61N5/0613; A61N5/062; A61B2018/208; A61N2005/0635; A61N2005/0643; A61N2005/0645; A61N2005/065; A61N2005/0651; A61N2005/0652; A61N5/0601; A61N5/067
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
102 words
Apparatus for treatment of a cancerous lesion part having absorbed and accumulated in advance therein a photosensitive substance with an affinity for tumors, with light energy irradiated from a light source to said cancerous lesion part characterised in that solid light source comprises one or more first photodiodes (3a) adapted to excite said photosensitive substance from the ground state thereof to a singlet state of a higher energy level and one or more second photodiodes (3b) to excite an energy level of said photosensitive substance which has transited from said singlet state to a triplet state to a still higher energy level.
Claim 2
Dependent Claim
102 words
Apparatus for treatment of a cancerous lesion part having absorbed and accumulated in advance therein a photosensitive substance with an affinity for tumors, with light energy irradiated from a light source to said cancerous lesion part characterised in that solid light source comprises one or more first photodiodes (3a) adapted to excite said photosensitive substance from the ground state thereof to a singlet state of a higher energy level and one or more second photodiodes (3b) to excite an energy level of said photosensitive substance which has transited from said singlet state to a triplet state to a still higher energy level.
Claim 3
Dependent Claim
70 words
The apparatus according to claim 1, wherein a plurality of pairs of first (3a) and second (3b) photodiodes are disposed on a curved surface of a part-spherical shaped support member (3) on the peripheral surface of said support member (3) and projecting radially outwardly from said curved surface, any two randomly selected adjacent photodiodes being constituted by one of the first photodiodes (3a) and one of the second photodiodes (3b).
Claim 4
Dependent Claim
105 words
The apparatus according to claim 1, wherein a plurality of pairs of such first and second photodiodes are disposed on a side surface of one end of a flexible support member, in rows extending longitudinally of the flexible support member and transversely to said longitudinal direction, ones of the first and second photodiodes (3a, 3b) being positioned adjacent to one another and first and second photodiodes being surrounded with a freely expansible and contractive balloon (5) fastened at the opposite ends thereof to said support member, said balloon (3) being adapted to be provided with a flow path for introduction and discharge of a coolant.
Claim 5
Dependent Claim
24 words
The apparatus according to claim 3, wherein said flow path for introduction and discharge of a coolant is disposed inside said flexible support member.
Claim 6
Independent Claim
21 words
The apparatus according to any one of claims 1 to 4, wherein said first and second photodiodes are respectively laser diodes.
Claim 7
Independent Claim
21 words
The apparatus according to any one of claims 1 to 4, wherein said first and second photodiodes are respectively light-emitting diodes.
Claim 8
Dependent Claim
22 words
The apparatus according to claim 6, wherein said first photodiodes are light-emitting diodes of GaAsP type having a wavelength of 630 nm.
Claim 9
Dependent Claim
22 words
The apparatus according to claim 6, wherein said second photodiodes are light emitting diodes of GaP having a wavelength of 690 nm.
Claim 10
Independent Claim
35 words
The apparatus according to any one of the preceding claims wherein said light source is connected to a power source (1) via a circuit (2) adapted to limit any overcurrent flowing to said light source.
Claim 11
Dependent Claim
14 words
The apparatus according to claim 9, wherein said circuit part comprises a protective resistance.
Claim 12
Dependent Claim
24 words
The apparatus according to claim 1, wherein said light source comprises a plurality of first and second photodiodes, which are alternately connected in series.
Claim 13
Independent Claim
25 words
The apparatus according to any one of the preceding claims which is provided with cooling means adapted to remove heat generated in said light source.
References Cited (Backward Citations)
No citation records indexed.
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