Method and system for displaying X-ray images of blood-vessel structure parts of subject

• US 4,943,987 A
• Filed: 11/01/1989
• Issued: 07/24/1990
• Est. Priority Date: 08/07/1987
• Status: Expired due to Term

• Current Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Inventors: Ogura, Ichiro, Asahina, Hiroshi
• Primary Examiner(s): Fields, Carolyn E.
• Assistant Examiner(s): Porta, David P.
• Application Number:
  US07/430,964
• Time in Patent Office: 265 Days
• Field of Search: 378/99, 378/901, 378/95, 378/62, 358/111, 364/413.23, 364/413.18
• US Class Current: 378/98.5
• CPC Class Codes: A61B 6/481 involving the use of contrast agents
• CPC Class Codes: A61B 6/504 for diagnosis of blood vessels, e.g. by angiography

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.

Claims

1. 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.

2. 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.

3. 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.

4. 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.

5. 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.

6. 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.

7. 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.

8. 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.

9. 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.