Method of analyzing regional ventricular function utilizing centerline method
First Claim
1. A method of analyzing regional ventricular function utilizing centerline method, comprising the steps of:
- (a) drawing a first set of lines, which are perpendicular to end-diastolic contour, between end-diastolic and end-systolic contours;
(b) drawing a line between the end-diastolic and end-systolic contours, which is converging to an intersection of the end-systolic contour and a major axis joining an apex of the end-diastolic contour and a midpoint of an aortic valve portion of the end-diastolic contour, whenever a certain line to be drawn as one of the first set of lines is going to intersect with the major axis, as a replacement for that certain line;
(c) determining a centerline passing through midpoints of the lines drawn at the steps (a) and (b);
(d) drawing a second set of lines, which are perpendicular to the centerline, between the end-diastolic and end-systolic contours;
(e) drawing a line between the end-diastolic and end-systolic contours, which is converging to an intersection of the end-systolic contour and a major axis joining an apex of the end-diastolic contour and a midpoint of an aortic valve portion of the end-diastolic contour, whenever a certain line to be drawn as one of the second set of lines is going to intersect with the major axis, as a replacement for that certain line; and
(f) analyzing regional ventricular function according to lengths of the lines drawn at the steps (d) and (e).
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Abstract
A method of analyzing regional ventricular function utilizing centerline method capable of producing sufficiently natural results in the vicinity of the apex. The method includes the step of drawing a line between the end-diastolic and end-systolic contours, which is converting to an intersection of the end-systolic contour and a major axis joining the apex of the end-diastolic contour and a midpoint of an aortic valve portion of the end-diastolic contour, whenever a line to be drawn between the end-diastolic and end-systolic contour is going to intersect with the major axis. In the method, all the lines to be drawn between the end-diastolic and end-systolic contours are drawn sequentially in a first direction from one end of an aortic valve portion toward an apex for one half of the end-diastolic contour, and in a second direction from another end of the aortic valve portion toward the apex, which is opposite to the first direction, for other half of the end-diastolic contour.
17 Citations
3 Claims
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1. A method of analyzing regional ventricular function utilizing centerline method, comprising the steps of:
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(a) drawing a first set of lines, which are perpendicular to end-diastolic contour, between end-diastolic and end-systolic contours; (b) drawing a line between the end-diastolic and end-systolic contours, which is converging to an intersection of the end-systolic contour and a major axis joining an apex of the end-diastolic contour and a midpoint of an aortic valve portion of the end-diastolic contour, whenever a certain line to be drawn as one of the first set of lines is going to intersect with the major axis, as a replacement for that certain line; (c) determining a centerline passing through midpoints of the lines drawn at the steps (a) and (b); (d) drawing a second set of lines, which are perpendicular to the centerline, between the end-diastolic and end-systolic contours; (e) drawing a line between the end-diastolic and end-systolic contours, which is converging to an intersection of the end-systolic contour and a major axis joining an apex of the end-diastolic contour and a midpoint of an aortic valve portion of the end-diastolic contour, whenever a certain line to be drawn as one of the second set of lines is going to intersect with the major axis, as a replacement for that certain line; and (f) analyzing regional ventricular function according to lengths of the lines drawn at the steps (d) and (e). - View Dependent Claims (2)
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3. A method of analyzing regional ventricular function utilizing centerline method, comprising the steps of:
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(a) drawing a first set of lines, which are perpendicular to end-diastolic contour, between end-diastolic and end-systolic contours, the lines being drawn sequentially in a first direction from one end of an aortic valve portion toward an apex for one half of the end-diastolic contour, and in a second direction from another end of the aortic valve portion toward the apex, which is opposite to the first direction, for other half of the end-diastolic contour; (b) determining a centerline passing through midpoints of the first set of lines; (c) drawing a second set of lines, which are perpendicular to the centerline, between the end-diastolic and end-systolic contours, the lines being drawn sequentially in a first direction from one end of an aortic valve portion toward an apex for one half of the end-diastolic contour, and in a second direction from another end of the aortic valve portion toward the apex, which is opposite to the first direction, for other half of the end-diastolic contour; and (d) analyzing regional ventricular function according to lengths of the second set of lines.
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Specification