US3816849A
Expired / Lapsed
US
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Method and apparatus for preparing vectorcardiograms with colors in accordance with depth
Assignee: Hokkaido University
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Filing: 1972-03-13
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Granted: 1974-06-11
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Expires: 1992-03-13
Abstract
Abstract A color vectorcardiogram having spots colored with different colors in accordance with the depth thereby enabling a stereographical diagonosis is prepared by displaying a horizontal vector loop of a vectorcardiograph on the fluorescent screen of a cathode ray tube, photographing the image of the spots of the horizontal vector loop through a tomographic filter or a color filter and coloring with different colors the respective spots of the photographed vector loop in accordance with the vertical scalar of the vectorcardiograph.
Inventors
- 👤 S Kinoshita
- 👤 T Kobayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:00
CPC Classifications
H; H04; H04N; H04N9/00; H04N9/43; A; A61; A61B; A61B5/00; A61B5/24; A61B5/316; A61B5/318; A61B5/339; A61B5/341; H04N9/11
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
120 words
A method of preparing a color vectorcardiogram comprising the steps of displaying a horizontal vector loop of a cardiogram on the fluorescent screen of a cathode ray tube of the monochromatic type, photographing the image of the spots of said horizontal vector loop through a tomographic filter, displacing said tomographic filter to different positions in accordance with the vertical scalar and repeating the photographing of said horizontal vector loop through said tomographic filter at said different positions thereby forming a plurality of tomographic vector loops corresponding to different depths, coloring each tomographic vector loop with different colors in accordance with the depth thereof, and superposing respective colored tomographic vector loops one upon the other to form a continuous color vectorcardiogram.
Claim 2
Independent Claim
120 words
A method of preparing a color vectorcardiogram comprising the steps of displaying a horizontal vector loop of a cardiogram on the fluorescent screen of a cathode ray tube of the monochromatic type, photographing the image of the spots of said horizontal vector loop through a tomographic filter, displacing said tomographic filter to different positions in accordance with the vertical scalar and repeating the photographing of said horizontal vector loop through said tomographic filter at said different positions thereby forming a plurality of tomographic vector loops corresponding to different depths, coloring each tomographic vector loop with different colors in accordance with the depth thereof, and superposing respective colored tomographic vector loops one upon the other to form a continuous color vectorcardiogram.
Claim 3
Dependent Claim
54 words
The method according to claim 1 wherein said tomographic filter is provided with a plurality of equally spaced apart black stripes of equal width and driven by a galvanometer energized by the output of a vectorcardiograph such that it is driven by the difference between the movements in the directions of Y-axis and X-axis.
Claim 4
Dependent Claim
52 words
The method according to claim 2 wherein the sensitivities or deflections in the directions of X and Y axes are adjusted such that the movement of the image of said horizontal vector loop focused on the surface of said tomographic filter is governed solely by the movement in the direction of Y-axis.
Claim 5
Dependent Claim
46 words
The method according to claim 1 wherein each tomographic vector loop is colored by superposing it upon an ordinary horizontal plane vector loop and a plurality of colored cellophane sheets, each colored in accordance with the depth, and photographing the superposeD assembly with a color film.
Claim 6
Dependent Claim
19 words
The method according to claim 4 wherein said ordinary horizontal plane vector loop is graduated with a time scale.
Claim 7
Independent Claim
78 words
A method of preparing a color vectorcardiogram comprising the steps of displaying a horizontal vector loop of a vectorcardiograph on the fluorescent screen of a cathode ray tube said fluorescent screen having a relatively wide wavelength band, photographing said horizontal vector loop on a color film through a color filter which is moved in accordance with the vertical scalar of the vectorcardiograph thereby forming a color vectorcardiogram having spots colored with different colors in accordance with the depth.
Claim 8
Independent Claim
78 words
A method of preparing a color vectorcardiogram comprising the steps of displaying a horizontal vector loop of a vectorcardiograph on the fluorescent screen of a cathode ray tube said fluorescent screen having a relatively wide wavelength band, photographing said horizontal vector loop on a color film through a color filter which is moved in accordance with the vertical scalar of the vectorcardiograph thereby forming a color vectorcardiogram having spots colored with different colors in accordance with the depth.
Claim 9
Dependent Claim
22 words
The method according to claim 6 wherein said filter comprises a plurality of stripes of different colors arranged in parallel close relationship.
Claim 10
Dependent Claim
43 words
The method according to claim 6 wherein said color filter is driven by a galvanometer energized by the output of the pickup of a vectorcardiograph such that it is driven by the difference between the movements in the directions of X-axis and Y-axis.
Claim 11
Dependent Claim
97 words
Apparatus for preparing a color vectorcardiogram comprising a cathode ray tube having a fluorescent screen, means responsive to the output of a pickup of a vectorcardiograph for displaying a horizontal vector loop of the vectorcardiograph on said fluorescent screen, a photographic camera for photographing the image of said horizontal vector loop, a filter driven by a galvanometer essentially responsive to the vertical component of said output, said filter being located intermediate said fluorescent screen and said photographic camera, and a condenser lens for focusing the image of said horizontal vector loop on the surface of said filter.
Claim 12
Dependent Claim
97 words
Apparatus for preparing a color vectorcardiogram comprising a cathode ray tube having a fluorescent screen, means responsive to the output of a pickup of a vectorcardiograph for displaying a horizontal vector loop of the vectorcardiograph on said fluorescent screen, a photographic camera for photographing the image of said horizontal vector loop, a filter driven by a galvanometer essentially responsive to the vertical component of said output, said filter being located intermediate said fluorescent screen and said photographic camera, and a condenser lens for focusing the image of said horizontal vector loop on the surface of said filter.
Claim 13
Dependent Claim
32 words
The apparatus according to claim 9 wherein said cathode ray tube is of the monochromatic type and said filter is a tomographic filter having a plurality of equally spaced apart black stripes.
Claim 14
Dependent Claim
43 words
The apparatus according to claim 9 wherein said fluorescent screen of said cathode ray tube has a relatively wide wavelength band and said filter is a color filter comprising a plurality of stripes of different colors which are arranged in parallel close relationship.
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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) | 1977-06-10 | 1977-12-10 | 1978-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-10 | 1981-12-10 | 1982-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-10 | 1985-12-10 | 1986-06-11 | $7700.00 | Window Closed / Lapsed |