US5065435A
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Method and apparatus for analyzing ventricular function
Assignee: Toshiba Corp
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Filing: 1989-11-14
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Granted: 1991-11-12
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Expires: 2009-11-14
Abstract
Abstract A method for analyzing ventricular function comprises the steps for generating ED contour image data representing the contour of the heart in an end diastole (ED) phase and an ES contour image data representing the contour of the heart in an end systole (ES) phase, generating a graph of an average cardiac function of the normal heart, and generating a standard heart ES contour (or ED contour) image from the ED contour image or the S contour image of the subject heart, to be examined, by the graph of average cardiac function of the normal heart. The ED contour image data or ES contour image data of the heart of a subject to be examined is superimposed on the standard heart ES contour or the ED contour image data, to analyze the ventricular function of the subject from a state of superimposition between the contour image data of the subject's heart and the standard heart contour image data.
Inventors
- 👤 Mitsuo Oe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:01
CPC Classifications
G; G06; G06T; G06T7/00; G06T7/0002; A; A61; A61B; A61B6/00; A61B6/50; A61B6/504; A61B5/00; A61B5/103; A61B5/107; A61B5/1075; A61B6/503; G06T2207/00; G06T2207/30; G06T2207/30004; G06T2207/30048
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
164 words
A method for analyzing a ventricular function of a subject heart, comprising the steps of: forming an ED contour image representing a contour image of the subject heart in an end diastole (DE) phase and forming and ES contour image representing a contour image of the subject heart in an end systole (ES) phase; forming a cardiac motion contour image, using the ED contour image and the ES contour image; generating a graph of an average cardiac function of a normal heart; generating a standard cardiac motion contour image of the normal heart obtained from the graph of the average cardiac function of the normal heart with the ED contour image or the ES contour image being set as a base; superimposing the cardiac motion contour image on the standard cardiac motion contour image; and diagnosing an abnormal region in the subject heart from the superimposed state of the cardiac motion contour image of the subject heart and the standard cardiac motion contour image.
Claim 2
Independent Claim
164 words
A method for analyzing a ventricular function of a subject heart, comprising the steps of: forming an ED contour image representing a contour image of the subject heart in an end diastole (DE) phase and forming and ES contour image representing a contour image of the subject heart in an end systole (ES) phase; forming a cardiac motion contour image, using the ED contour image and the ES contour image; generating a graph of an average cardiac function of a normal heart; generating a standard cardiac motion contour image of the normal heart obtained from the graph of the average cardiac function of the normal heart with the ED contour image or the ES contour image being set as a base; superimposing the cardiac motion contour image on the standard cardiac motion contour image; and diagnosing an abnormal region in the subject heart from the superimposed state of the cardiac motion contour image of the subject heart and the standard cardiac motion contour image.
Claim 3
Dependent Claim
52 words
The method according to claim 1, wherein the step of forming a cardiac motion contour image comprises the steps of: continuously generating images of the subject heart; forming ED and ES contour images of the subject heart from said generated images; and superimposing the ED and ES contour images on each other.
Claim 4
Dependent Claim
157 words
The method according to claim 1 or 2, wherein the step of forming a cardiac motion contour image comprises the steps of: dividing the ED contour image into a predetermined number of first points, to form a predetermined number of first chords corresponding to the first points on the periphery of the ED contour image, said first chords extending perpendicularly from the ED contour image to the ES contour image; forming a first center line into connecting center points of the first chords; dividing the first center line into a predetermined number of second points and forming a predetermined number of second chords corresponding to the second points on the periphery of the first center line, said second chords extending perpendicularly from the ED contour image to the ES contour image; and measuring the length of each of the second chords and normalizing the measured length with the length of the periphery of the ED contour image.
Claim 5
Dependent Claim
83 words
The method according to claim 3, wherein the step of generating a graph of an average cardiac function comprises the steps of: calculating a plurality of cardiac function graphs relative to a plurality of persons having a normal heart; calculating an average cardiac function graph from the cardiac function graphs; calculating a standard deviation graph; and adding and subtracting the standard deviation graph to and from the average cardiac function graph, to form a cardiac function graph having upper and lower standard deviations.
Claim 6
Dependent Claim
104 words
The method according to claim 4, wherein the step of generating a standard cardiac motion contour image comprises the steps of: forming a standard ES contour image from the ED contour image of the subject heart; dividing the ED contour image into a plurality of points; forming a plurality of standard chords from the plurality of points of the ED contour image; extending the standard chords from the ED contour image by the length of the upper and lower standard deviations of the cardiac function graph; and connecting the points along the periphery of the ED contour image to form a standard contour image.
Claim 7
Dependent Claim
38 words
The method according to claim 1, 2, 4 or 5, wherein the step of superimposing comprises the step of superposing the standard cardiac motion contour image and said ED contour image of the subject heart one over another.
Claim 8
Dependent Claim
42 words
The method according to claim 1 or 2, wherein the standard cardiac motion contour image includes a predetermined number of chords, said chords being superimposed on the Ed contour image and extending inward to a central point of the ED contour image.
Claim 9
Dependent Claim
22 words
The method according to claim 1 or 2, wherein the chords extend inward toward a predetermined point in said ED contour image.
Claim 10
Independent Claim
156 words
An apparatus for analyzing a ventricular function of a subject heart, comprising: means for forming an ED contour image representing a contour of the subject heart in an end diastole (DE) phase and an ES contour image in an end systole (ES) phase; means for forming a cardiac motion contour image using the ED contour image and the ES contour image; means for generating a graph of an average cardiac function of a normal heart; means for generating a standard cardiac motion contour image obtained by the graph of the average cardiac function of the normal heart with the ED contour image or the ES contour image being set as a base; means for superimposing the cardiac motion contour image on the standard cardiac motion contour image; and means for diagnosing an abnormal region of the subject heart from the superimposed cardiac motion contour image of the subject heart and the standard cardiac motion contour image.
Claim 11
Independent Claim
156 words
An apparatus for analyzing a ventricular function of a subject heart, comprising: means for forming an ED contour image representing a contour of the subject heart in an end diastole (DE) phase and an ES contour image in an end systole (ES) phase; means for forming a cardiac motion contour image using the ED contour image and the ES contour image; means for generating a graph of an average cardiac function of a normal heart; means for generating a standard cardiac motion contour image obtained by the graph of the average cardiac function of the normal heart with the ED contour image or the ES contour image being set as a base; means for superimposing the cardiac motion contour image on the standard cardiac motion contour image; and means for diagnosing an abnormal region of the subject heart from the superimposed cardiac motion contour image of the subject heart and the standard cardiac motion contour image.
Claim 12
Dependent Claim
59 words
The apparatus according to claim 9, wherein said means for forming a cardiac motion contour image comprises means for continuously generating images of the subject heart, means for forming ED and ES contour images of the heart from said images, and means for superimposing the ED and ES contour images on each other with longitudinal lines thereof being coincided.
Claim 13
Dependent Claim
160 words
The apparatus according to claim 9, wherein the means for forming a cardiac motion contour image comprises means for dividing the ED contour image into a predetermined number of first points to form a predetermined number of first chords corresponding to the first points on the periphery of the ED contour image, said first chords extending perpendicularly from the ED contour image to the ES contour image, means for forming a first center line by connecting center points of the first chords, means for dividing the first center line into a predetermined number of second points and forming a predetermined number of second chords corresponding to the second points on the periphery of the first center line, said second chords extending perpendicularly from the ED contour image to the ES contour image, and means for measuring the length of each of the second chords and normalizing the measured length with the length of the periphery of the ED contour image.
Claim 14
Dependent Claim
88 words
The apparatus according to claim 11, wherein said means for generating a graph of an average cardiac function comprises means for calculating a plurality of cardiac function graphs relative to a plurality of persons having a normal heart, means for calculating the average cardiac function graph from the cardiac function graphs, means for calculating a standard deviation graph. and means for adding and subtracting the standard deviation graph to and from the average cardiac function graph, to form a cardiac function graph having upper and lower standard deviations.
Claim 15
Dependent Claim
88 words
The apparatus according to claim 12, wherein said means for generating a standard cardiac motion contour image comprises means for forming a standard ES contour image from the ED contour image of the subject heart, to form standard chords therefrom, means for obtaining points extending the standard chords from the ED contour image by the length of the upper and lower standard deviations of the cardiac function graph, and means for connecting the points along the periphery of the ED contour image to form a standard contour image.
Claim 16
Dependent Claim
34 words
The apparatus according to claim 9, 11, 12 or 13, wherein said means for superimposing comprises means for superimposing the standard cardiac motion contour image on said ED contour image of the subject heart.
Claim 17
Dependent Claim
41 words
The apparatus according to claim 9 or 10, wherein the standard cardiac motion contour image includes a predetermined number of chords, said chords being superimposed on the ED contour image in a manner to extend inside from the ED contour image.
Claim 18
Dependent Claim
22 words
The apparatus according to claim 9 or 10, wherein the chords extend inward toward a predetermined point in said ED contour image.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-11-11 | 1995-05-13 | 1995-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-11-11 | 1999-05-13 | 1999-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-11-11 | 2003-05-13 | 2003-11-12 | $7700.00 | Window Closed / Lapsed |