US5018173A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diagnosis apparatus using X-ray CT device
Assignee: Toshiba Corp
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Filing: 1989-10-13
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Granted: 1991-05-21
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Expires: 2009-10-13
Abstract
Abstract A diagnosis apparatus using an X-ray CT includes an X-ray scanner for repeatedly scanning a single portion of a subject using an X-ray a plurality of times to output X-ray projection data, an injector for injecting a contrast medium into the subject, a data collecting device for collecting the X-ray projection data output from the X-ray scanner, an image reconstruction device for reconstructing the collected data to generate reconstructed image data, an image analyzing device for analyzing the image data obtained by the image reconstruction device to calculate parameters each representing a state of permeability of blood vessels, a computer for combining the parameters to form diagnosis images, and a display for displaying the diagnosis image.
Inventors
- 👤 Norihiko Komai
- 👤 Takashi Nishiguchi
- 👤 Junji Hirayama
- 👤 Tomoaki Terada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:10
CPC Classifications
A; A61; A61B; A61B6/00; A61B6/48; A61B6/481; A61B5/00; A61B5/02; A61B5/026; A61B5/0275; A61B5/02755; A61B6/50; A61B6/504; A61B5/40; A61B5/4058; A61B5/4064; Y; Y10; Y10S; Y10S378/00; Y10S378/901
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
140 words
A diagnostic apparatus using an X-ray CT device, comprising: X-ray scanning means for repeatedly scanning one or more portions of a subject using an X-ray a plurality of times for each portion to output X-ray projection data; image processing means for processing the X-ray projection data output from said scanning means to generate image data corresponding to a plurality of tomograms with contrast; and image analyzing means for analyzing the image data obtained by said image processing means to calculate a set of parameters which represents a state of permeability of blood vessels, by collecting CT value data of an identical location for a time t from the series of image data, and generating concentration data representing concentrations of contrast medium in the blood vessels, and calculating the parameters in accordance with the CT value data and the concentration data.
Claim 2
Dependent Claim
140 words
A diagnostic apparatus using an X-ray CT device, comprising: X-ray scanning means for repeatedly scanning one or more portions of a subject using an X-ray a plurality of times for each portion to output X-ray projection data; image processing means for processing the X-ray projection data output from said scanning means to generate image data corresponding to a plurality of tomograms with contrast; and image analyzing means for analyzing the image data obtained by said image processing means to calculate a set of parameters which represents a state of permeability of blood vessels, by collecting CT value data of an identical location for a time t from the series of image data, and generating concentration data representing concentrations of contrast medium in the blood vessels, and calculating the parameters in accordance with the CT value data and the concentration data.
Claim 3
Dependent Claim
43 words
An apparatus according to claim 1, wherein said image analyzing means comprises means for calculating an amount of a contrast medium which leaks from the blood vessels, an amount of the blood vessels, and gaps between cells in accordance with the image data.
Claim 4
Dependent Claim
25 words
An apparatus according to claim 1, further comprising an injector for injecting an iodine-based contrast medium into a subject, the subject including the blood vessels.
Claim 5
Dependent Claim
38 words
An apparatus according to claim 1, wherein said image processing means comprises data collecting means for collecting the X-ray projection data to output the collected data, and reconstructing means for converting the collected data into reconstructed image data.
Claim 6
Dependent Claim
21 words
An apparatus according to claim 1, wherein said image analyzing means comprises means for combining the parameters to form functional images.
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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) | 1994-05-20 | 1994-11-19 | 1995-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-05-20 | 1998-11-19 | 1999-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-05-20 | 2002-11-19 | 2003-05-21 | $7700.00 | Window Closed / Lapsed |