Method of localizing the myocardium of the heart and method of determining perfusion parameters thereof
First Claim
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1. A method of determining a position of the myocardium of the heart from a magnetic resonance (MR) image or a series of MR images of the heart of a patient, comprising the steps of:
- first determining from the image or images a left ventricle contour and a right ventricle contour of the heart;
second determining a thickness measure of the myocardium based on a detected distance between said contours in a predetermined region in which both contours of the left and right ventricles extend such that outside said region the position of the myocardium is bounded by said left ventricle contour and an outer contour that extends outside said left ventricle contour at a distance that is equal to the thickness measure of the myocardium.
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Abstract
The invention relates to a method of deriving the myocardial region from one or more MR images. Left and right ventricle contours (1, 2) are determined. The thickness or width (D) of the myocardial region is computed from the distance between these contours in a predetermined part (A) of the image (images). The location of the myocardial region outside the preset region is derived on the basis of this distance.
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Citations
8 Claims
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1. A method of determining a position of the myocardium of the heart from a magnetic resonance (MR) image or a series of MR images of the heart of a patient, comprising the steps of:
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first determining from the image or images a left ventricle contour and a right ventricle contour of the heart; second determining a thickness measure of the myocardium based on a detected distance between said contours in a predetermined region in which both contours of the left and right ventricles extend such that outside said region the position of the myocardium is bounded by said left ventricle contour and an outer contour that extends outside said left ventricle contour at a distance that is equal to the thickness measure of the myocardium. - View Dependent Claims (2, 3, 4)
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5. A magnetic resonance (MR) method for determining perfusion parameters of the heart of a patient while administering a contrast liquid, comprising the steps of:
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first calculating a position of the myocardium of the heart from a magnetic resonance (MR) image or a series of MR images of the heart of a patient, which step of calculating further comprises the steps of; first determining from the image or images a left ventricle contour and a right ventricle contour of the heart, second determining a thickness measure of the myocardium based on a detected distance between said contours in a predetermined region in which both contours of the left and right ventricles extend such that outside the region the position of the myocardium is bound by the left ventricle contour and an outer contour that extends outside the left ventricle contour at a distance that is equal to the thickness measure of the myocardium; segmenting the myocardium; second calculating a time intensity curve that represents the variation in time of the concentration of the contrast liquid in the myocardium for at least one segment; and deriving the perfusion parameters from the time intensity curve. - View Dependent Claims (6, 7, 8)
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Specification