US4943987A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and system for displaying X-ray images of blood-vessel structure parts of subject
Assignee: Toshiba Corp
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Filing: 1989-11-01
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Granted: 1990-07-24
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Expires: 2009-11-01
Abstract
Abstract X-ray mask images of a subject are acquired by a TV camera before a contrast media injected by a injector reaches a region of interest of the subject, the acquired X-ray mask images are stored in a mask image memory in accordance with a frame counter and a memory controller. X-ray contrast images of the subject are acquired by the TV camera after the contrast media reaches the region of interest of the subject, the acquired X-ray contrast images are stored in a contrast image memory in accordance with a frame counter and a memory controller. The mask images and contrast images are subtracted by a subtraction processor, and X-ray subtraction images are obtained. The X-ray images of the subject acquired by the TV camera and the X-ray subtraction images are superimposed by a superimposition processor, and then are displayed on a TV monitor.
Inventors
- 👤 Hiroshi Asahina
- 👤 Ichiro Ogura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:05
CPC Classifications
A; A61; A61B; A61B6/00; A61B6/48; A61B6/481; A61B6/50; A61B6/504
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
104 words
A method for generating and displaying X-ray images of a region of interest of a subject, the method comprising the steps of: injecting a contrast media into the subject; acquiring X-ray contrast images of the region of interest of the subject after the contrast media reaches the region of interest of the subject; generating graphic line data representing a locus of changing position of the region of interest by using the X-ray contrast images; acquiring X-ray images in the region of interest of the subject; superimposing the graphic line data on X-ray images to obtain X-ray superimposition images; and displaying the X-ray superimposition images.
Claim 2
Independent Claim
104 words
A method for generating and displaying X-ray images of a region of interest of a subject, the method comprising the steps of: injecting a contrast media into the subject; acquiring X-ray contrast images of the region of interest of the subject after the contrast media reaches the region of interest of the subject; generating graphic line data representing a locus of changing position of the region of interest by using the X-ray contrast images; acquiring X-ray images in the region of interest of the subject; superimposing the graphic line data on X-ray images to obtain X-ray superimposition images; and displaying the X-ray superimposition images.
Claim 3
Dependent Claim
29 words
A method according to claim 1, wherein the graphic line data includes data for indicating a balloon length and data for indicating the region of interest of the subject.
Claim 4
Independent Claim
128 words
A method for generating and displaying X-ray images of a region of interest of a subject, the method comprising the steps of: injecting a contrast media into the subject; acquiring at least one X-ray mask image of the region of interest of the subject before the contrast media reaches the region of interest of the subject; acquiring X-ray contrast images of the region of interest of the subject after the contrast media reaches the region of interest of the subject; subtracting the X-ray contrast images from the at least one X-ray mask image to obtain X-ray subtraction images; acquiring X-ray images of the region of interest of the subject; superimposing the X-ray subtraction images on the X-ray images to obtain X-ray superimposition images; and displaying X-ray superimposition images.
Claim 5
Independent Claim
128 words
A method for generating and displaying X-ray images of a region of interest of a subject, the method comprising the steps of: injecting a contrast media into the subject; acquiring at least one X-ray mask image of the region of interest of the subject before the contrast media reaches the region of interest of the subject; acquiring X-ray contrast images of the region of interest of the subject after the contrast media reaches the region of interest of the subject; subtracting the X-ray contrast images from the at least one X-ray mask image to obtain X-ray subtraction images; acquiring X-ray images of the region of interest of the subject; superimposing the X-ray subtraction images on the X-ray images to obtain X-ray superimposition images; and displaying X-ray superimposition images.
Claim 6
Independent Claim
152 words
A system for generating and displaying X-ray images of a region of interest of a subject, the system comprising: injection means for injecting a contrast media into the subject; image acquiring means for acquiring X-ray images of the region of interest of the subject; image storing means for storing the X-ray images acquired by the image acquiring means after the contrast media injected by the injection means reaches the region of interest of the subject; graphic line data generating means for generating graphic line data representing a locus of changing position of the region of interest by using the X-ray images stored in the image storing means; superimposition means for superimposing the graphic line data generated by the graphic line data generating means on the X-ray images acquired by the image acquiring means to obtain X-ray superimposition images; and display means for displaying the X-ray superimposition images obtained by the superimposition means.
Claim 7
Independent Claim
152 words
A system for generating and displaying X-ray images of a region of interest of a subject, the system comprising: injection means for injecting a contrast media into the subject; image acquiring means for acquiring X-ray images of the region of interest of the subject; image storing means for storing the X-ray images acquired by the image acquiring means after the contrast media injected by the injection means reaches the region of interest of the subject; graphic line data generating means for generating graphic line data representing a locus of changing position of the region of interest by using the X-ray images stored in the image storing means; superimposition means for superimposing the graphic line data generated by the graphic line data generating means on the X-ray images acquired by the image acquiring means to obtain X-ray superimposition images; and display means for displaying the X-ray superimposition images obtained by the superimposition means.
Claim 8
Dependent Claim
29 words
A system according to claim 4, wherein the graphic line data includes data for indicating a balloon length and data for indicating the region of interest of the subject.
Claim 9
Independent Claim
234 words
A system for generating and displaying X-ray images of a region of interest of a subject, the system comprising: injection means for injecting a contrast media into the subject; image acquiring means for acquiring X-ray images of the region of interest of the subject; first image storing means for storing a first portion of the X-ray images acquired by the image acquiring means before the contrast media injected by the injection means reaches the region of interest of the subject; second image storing means for storing a second portion of the X-ray images acquired by the image acquiring means after the contrast media injected by the injection means reaches the region of interest of the subject; detecting means for generating a memory detection signal upon detecting a selected state of the subject; selection means for selecting the first and second image storing means in accordance with the memory detection signal; subtraction means for subtracting the second portion of the X-ray images stored in the second image storing means from the first portion of the X-ray images stored in the first image storing means to obtain X-ray subtraction images; superimposition means for superimposing the X-ray subtraction images obtained by the subtraction means on a third portion of the X-ray images acquired by the image acquiring means to obtain X-ray superimposition images; and display means for displaying the X-ray superimposition images obtained by the superimposition means.
Claim 10
Independent Claim
234 words
A system for generating and displaying X-ray images of a region of interest of a subject, the system comprising: injection means for injecting a contrast media into the subject; image acquiring means for acquiring X-ray images of the region of interest of the subject; first image storing means for storing a first portion of the X-ray images acquired by the image acquiring means before the contrast media injected by the injection means reaches the region of interest of the subject; second image storing means for storing a second portion of the X-ray images acquired by the image acquiring means after the contrast media injected by the injection means reaches the region of interest of the subject; detecting means for generating a memory detection signal upon detecting a selected state of the subject; selection means for selecting the first and second image storing means in accordance with the memory detection signal; subtraction means for subtracting the second portion of the X-ray images stored in the second image storing means from the first portion of the X-ray images stored in the first image storing means to obtain X-ray subtraction images; superimposition means for superimposing the X-ray subtraction images obtained by the subtraction means on a third portion of the X-ray images acquired by the image acquiring means to obtain X-ray superimposition images; and display means for displaying the X-ray superimposition images obtained by the superimposition means.
Claim 11
Dependent Claim
54 words
A system according to claim 6, wherein the detecting means includes: monitoring means for monitoring electrocardiogram signals of the subject; R-wave detecting means for detecting R-waves of the electrocardiogram signals monitored by the monitoring means; and means for generating the memory selection signal in accordance with the R-waves detected by the R-wave detecting means.
Claim 12
Independent Claim
225 words
A system for generating and displaying X-ray images of a region of interest of a subject, the system comprising: injection means for injecting a contrast media into the subject; image acquiring means for acquiring X-ray images of the region of interest of the subject; first image storing means for storing a first portion of the X-ray images acquired by the image acquiring means before the contrast media injected by the injection means reaches the region of interest of the subject; subtraction means for subtracting the first portion of the X-ray images stored in the first image storing means from a second portion of the X-ray images acquired by the image acquiring means after the contrast media injected by the injection means reaches the region of interest of the subject to obtain X-ray subtraction images; second image storing means for storing the X-ray subtraction images obtained by the subtraction means; detecting means for generating a memory selection signal upon detecting a selected state of the subject; selection means for selecting the second image storing means in accordance with the memory detection signal; superimposition means for superimposing the X-ray subtraction images stored in the second image storing means on third X-ray images acquired by the image acquiring means to obtain X-ray superimposition images; and display means for displaying the X-ray superimposition images obtained by the superimposition means.
Claim 13
Independent Claim
225 words
A system for generating and displaying X-ray images of a region of interest of a subject, the system comprising: injection means for injecting a contrast media into the subject; image acquiring means for acquiring X-ray images of the region of interest of the subject; first image storing means for storing a first portion of the X-ray images acquired by the image acquiring means before the contrast media injected by the injection means reaches the region of interest of the subject; subtraction means for subtracting the first portion of the X-ray images stored in the first image storing means from a second portion of the X-ray images acquired by the image acquiring means after the contrast media injected by the injection means reaches the region of interest of the subject to obtain X-ray subtraction images; second image storing means for storing the X-ray subtraction images obtained by the subtraction means; detecting means for generating a memory selection signal upon detecting a selected state of the subject; selection means for selecting the second image storing means in accordance with the memory detection signal; superimposition means for superimposing the X-ray subtraction images stored in the second image storing means on third X-ray images acquired by the image acquiring means to obtain X-ray superimposition images; and display means for displaying the X-ray superimposition images obtained by the superimposition means.
Claim 14
Dependent Claim
54 words
A system according to claim 8, wherein the detecting means includes: monitoring means for monitoring electrocardiogram signals of the subject; R-wave detecting means for detecting R-waves of the electrocardiogram signals monitored by the monitor means; and means for generating the memory selection signal in accordance with the R-waves detected by the R-wave detecting means.
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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) | 1993-07-23 | 1994-01-22 | 1994-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-07-23 | 1998-01-22 | 1998-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-07-23 | 2002-01-22 | 2002-07-24 | $7700.00 | Window Closed / Lapsed |