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US4562593A
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Method for determination of percentage T cell content of lymphocyte
Assignee: Mitsubishi Chemical Corp
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Filing: 1983-03-01
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Granted: 1985-12-31
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Expires: 2003-03-01
Abstract
Abstract A method for determining the percentage T-cell content of lymphocyte, which comprises scanning a test specimen with a pickup device, discriminating a lymphocyte from other cells contained in said specimen from the output level and regional information of the image signals transmitted from said pickup device, searching the data marginal to those of the cell discriminated as lymphocyte, to detect pixels corresponding to the image signal output level different from that corresponding to the lymphocytes or background, and discriminating a T-cell from other lymphocytes from the number of detected pixels.
Inventors
- 👤 Akihiko Ooe
- 👤 Masaki Fuse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:31
CPC Classifications
G; G06; G06M; G06M11/00; G06M11/02; G06M11/04; G01; G01N; G01N15/00; G01N15/10; G01N15/14; G01N15/1468; G01N15/1429; G01N15/1433
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
116 words
A fully automatic method for determining the percentage T-cell content of lymphocytes which have been sampled wherein said lymphocytes comprise T-cells, B-cells and Null-cells, said method comprising scanning a test specimen with a pick up device to produce image signals, discriminating a lymphocyte from other cells contained in said specimen from the output level and regional information of the image signals, searching the data marginal to those of the cells discriminated as a lymphocyte to detect pixels corresponding to the image signal output level different from that corresponding to the lymphocytes or background, discriminating a T-cell from other lymphocytes from the number of detected pixels, and determining and displaying the percentage T-cell content of said lymphocytes.
Claim 2
Dependent Claim
116 words
A fully automatic method for determining the percentage T-cell content of lymphocytes which have been sampled wherein said lymphocytes comprise T-cells, B-cells and Null-cells, said method comprising scanning a test specimen with a pick up device to produce image signals, discriminating a lymphocyte from other cells contained in said specimen from the output level and regional information of the image signals, searching the data marginal to those of the cells discriminated as a lymphocyte to detect pixels corresponding to the image signal output level different from that corresponding to the lymphocytes or background, discriminating a T-cell from other lymphocytes from the number of detected pixels, and determining and displaying the percentage T-cell content of said lymphocytes.
Claim 3
Dependent Claim
39 words
A method for determining the percentage T-cell content of lymphocyte according to claim 1, wherein the marginal data are the data of pixels apart by one pixel outward from the pixels corresponding to the cell discriminated as a lymphocyte.
Claim 4
Dependent Claim
42 words
A method for determining the percentage T-cell content of lymphocyte according to claim 1, wherein the marginal data are the data of pixels apart by one pixel outward from the rectangle circumscribing the pixels corresponding to the cell discriminated as a lymphocyte.
Claim 5
Dependent Claim
13 words
The method of claim 1 wherein the sampling of lymphocytes is performed manually.
Claim 6
Dependent Claim
20 words
The method of claim 1, wherein the image signals transmitted from the pickup device are subjected to double threshold processing.
Claim 7
Dependent Claim
59 words
The method of claim 1, wherein the image signals transmitted from the pick up device are subjected to double threshold processing in accordance with output levels corresponding to colorless background (A), pale yellowish-brown colored sheep or man erythrocytes (B), and red colored lymphocytes and granulocytes (C), where the value of the output level is in the order of A<B<C.
Claim 8
Dependent Claim
51 words
The method of claim 6 wherein at least one region corresponding to C is detected, lymphocytes are selected on the basis of regional information obtained from region C, and a region B is measured in the vicinity of the region corresponding to a lymphocyte to discriminate T-cells in a lymphocyte sample.
Claim 9
Dependent Claim
47 words
The method of claim 6, wherein at least one region corresponding to C is detected, neglecting regions B, resulting in the selection of a lymphocyte, then examining each pixel apart by one pixel outward from the lymphocyte to determine if such pixel belongs to a region B.
Claim 10
Dependent Claim
22 words
The method of claim 1, wherein at least two pixels are required, in one direction, for the measurement of one sheep erythrocyte.
Claim 11
Dependent Claim
16 words
The method of claim 1, wherein the pixel size is on the order of 1 μm.
References Cited (Backward Citations)
US3214574A
Cited
US3444517A
Cited
US3705383A
Cited
JPS511192A
Cited
JPS5198092A
Cited
US4082457A
Cited
US4307376A
Cited
JPS5512431A
Cited
US4330884A
Cited
US4320415A
Cited
US4298858A
Cited
US4425237A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-12-30 | 1989-07-01 | 1989-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-12-30 | 1993-07-01 | 1993-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-12-30 | 1997-07-01 | 1997-12-31 | $7700.00 | Window Closed / Lapsed |