US4998973A
Expired / Lapsed
US
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Endoscope
Assignee: Toshiba Corp
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Filing: 1988-06-15
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Granted: 1991-03-12
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Expires: 2008-06-15
Abstract
Abstract An endoscope including a light source for generating light beams having difference wavelengths to an object in an internal organ such as the stomach and the intestines of a subject, in which picture signals are picked up by a pickup device such as an optoelectronic device from the object radiated with the light beams, in which correction signals such as reference picture signals for correcting sensitivities of the light source and the pickup device depending on the different wavelengths of the light beams are picked up by the pickup device from a reference member such as a reference white plate radiated with the same light beams, and in which a bloodstream amount and an oxygen saturation rate are operated from the picture signals and the correction signals. The bloodstream amount and the oxygen saturation rate may be displayed on a display. The correction signals may be picked up outside the body of the subject.
Inventors
- 👤 Katsuya Kikuchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:37
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/02; A61B5/026; A61B5/0261; A61B1/00; A61B1/00002; A61B1/00004; A61B1/00009; A61B1/04; A61B1/05; A61B1/06; A61B1/0638; A61B1/0646; A61B1/0655; A61B5/145; A61B5/14542; A61B5/1455; A61B5/1459; Y; Y10; Y10S; Y10S600/00; Y10S600/921
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
126 words
An endoscope, comprising: means for generating light beams of different wavelengths toward an object; pickup means for picking up picture signals from the object by using the light beams, and also picking up correction signals from a reference member by using the light beams; and calculation means for calculating a bloodstream amount I HB and an oxygen saturation rate Iso 2 from the picture signals and the correction signals according to formulas (1), (2) and (3) below, ##EQU11## wherein Eλi and Eλj are the picture signals and Erλi and Erλj are reference picture signals as the correction signals, wherein λi and λj are wavelengths and wherein i and j are integers 1, 2, 3, 4, . . . I.sub.HB =200 ΔA.sub.14 . . . (2) ##EQU12##
Claim 2
Dependent Claim
126 words
An endoscope, comprising: means for generating light beams of different wavelengths toward an object; pickup means for picking up picture signals from the object by using the light beams, and also picking up correction signals from a reference member by using the light beams; and calculation means for calculating a bloodstream amount I HB and an oxygen saturation rate Iso 2 from the picture signals and the correction signals according to formulas (1), (2) and (3) below, ##EQU11## wherein Eλi and Eλj are the picture signals and Erλi and Erλj are reference picture signals as the correction signals, wherein λi and λj are wavelengths and wherein i and j are integers 1, 2, 3, 4, . . . I.sub.HB =200 ΔA.sub.14 . . . (2) ##EQU12##
Claim 3
Dependent Claim
28 words
The endoscope of claim 1, further comprising display means for displaying at least one of the bloodstream amount and the oxygen saturation rate obtained by the calculation means.
Claim 4
Dependent Claim
42 words
The endoscope of claim 1, wherein the pickup means includes an optoelectronic device for picking up the picture signals and the the reference picture signals as the correction signals from the object and the reference member, respectively, irradiated with the light beams.
Claim 5
Dependent Claim
14 words
The endoscope of claim 1, wherein the reference member is a reference white plate.
Claim 6
Dependent Claim
70 words
The endoscope of claim 1, wherein the light beam generating means includes a filter device having a transparent filter member for passing a white light and at least two other filter members for passing light having different wavelengths, a light source for generating the white light to be passed through the filter device, respectively and means for selecting one of the transparent filter member and the two other filter members.
Claim 7
Dependent Claim
52 words
The endoscope of claim 1, wherein the light beam generating means includes a light source for generating a white light, a variable wavelength light beam generator for generating at least two other light beams having different wavelengths, and means for selecting one of the white light and the two other light beams.
Claim 8
Dependent Claim
48 words
The endoscope of claim 1, wherein the light beam generating means includes a light source for generating a white light, at least two light beam generators for generating light beams having different wavelengths, and means for selecting one of the white light and the two other light beams.
Claim 9
Dependent Claim
122 words
An endoscope, comprising: means for generating light beams of different wavelengths toward an object; pickup means for picking up picture signals from the object by using the light beam, and also picking up correction signals from a reference member by using the light beams; and calculation means for calculating a bloodstream amount I HB and an oxygen saturation rate I SO2 from the picture signals and the correction signals according to formulas (1), (2) and (3), ΔA.sub.ij =logEλj-logEλi+bi . . . (1) wherein Eλi and Eλj are the picture signals and λi and λj are wavelengths and wherein bi is a constant and i and j are integers 1, 2, 3, 4, . . . I.sub.HB =200·ΔA.sub.14 . . . (2) ##EQU13##
Claim 10
Dependent Claim
122 words
An endoscope, comprising: means for generating light beams of different wavelengths toward an object; pickup means for picking up picture signals from the object by using the light beam, and also picking up correction signals from a reference member by using the light beams; and calculation means for calculating a bloodstream amount I HB and an oxygen saturation rate I SO2 from the picture signals and the correction signals according to formulas (1), (2) and (3), ΔA.sub.ij =logEλj-logEλi+bi . . . (1) wherein Eλi and Eλj are the picture signals and λi and λj are wavelengths and wherein bi is a constant and i and j are integers 1, 2, 3, 4, . . . I.sub.HB =200·ΔA.sub.14 . . . (2) ##EQU13##
Claim 11
Dependent Claim
28 words
The endoscope of claim 8, further comprising display means for displaying at least one of the bloodstream amount and the oxygen saturation rate obtained by the calculation means.
Claim 12
Dependent Claim
40 words
The endoscope of claim 8, wherein the pickup means includes an optoelectronic device for picking up the picture signals and reference picture signals as the correction signals from the object and the reference member, respectively, irradiated with the light beams.
Claim 13
Dependent Claim
14 words
The endoscope of claim 8, wherein the reference member is a reference white plate.
Claim 14
Dependent Claim
73 words
The endoscope of claim 8, wherein the light beam generating means includes a filter device having a transparent filter member for passing a white light and at least two other filter members for passing the light beams having the different wavelengths, respectively, a light source for generating the white light to be passed through the filter device, and means for selecting one of the transparent filter member and the two other filter members.
Claim 15
Dependent Claim
52 words
The endoscope of claim 8, wherein the light beam generating means includes a light source for generating a white light, a variable wavelength light beam generator for generating at least two other light beams having different wavelengths, and means for selecting one of the white light and the two other light beams.
Claim 16
Dependent Claim
48 words
The endoscope of claim 8, wherein the light beam generating means includes a light source for generating a white light, at least two light beam generators for generating light beams having different wavelengths, and means for selecting one of the white light and the two other light beams.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-03-11 | 1994-09-10 | 1995-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-03-11 | 1998-09-10 | 1999-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-03-11 | 2002-09-10 | 2003-03-12 | $7700.00 | Window Closed / Lapsed |