Method for determining midpoint coordinates of an image of a point-symmetrical structure
First Claim
1. A method for determining coordinates of a midpoint of a medical image having a point-symmetrical structure stored in a volume data record, comprising:
- extracting a portion of the volume data record containing the image of the point-symmetrical structure;
selecting a set of points having coordinates lying in the portion of the volume data record;
measuring a symmetry of the portion of the volume data record with respective to each of the set points;
identifying a point from the set points as the midpoint of the point-symmetrical structure based on the measuring; and
storing the coordinates of the midpoint in a computer unit.
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Accused Products
Abstract
The invention relates to a method for determining midpoint coordinates of an image of a point-symmetrical structure stored in a volume data record, comprising: extracting a partial volume data record from the volume data record which contains the image of the point-symmetrical structure, selecting a set of points whose coordinates lie in the partial volume data record, determining a measure for each point of the set wherein the measure for each of the points of the set characterizes in each case the symmetry of the partial volume data record in relation to this point, selecting a point as a midpoint of the point-symmetrical structure that point of the set in relation to which the partial volume data record has the greatest symmetry on the basis of the previously determined measures, and storing the coordinates of the midpoint in a computer unit.
9 Citations
20 Claims
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1. A method for determining coordinates of a midpoint of a medical image having a point-symmetrical structure stored in a volume data record, comprising:
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extracting a portion of the volume data record containing the image of the point-symmetrical structure; selecting a set of points having coordinates lying in the portion of the volume data record; measuring a symmetry of the portion of the volume data record with respective to each of the set points; identifying a point from the set points as the midpoint of the point-symmetrical structure based on the measuring; and storing the coordinates of the midpoint in a computer unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A device for determining coordinates of a midpoint of a medical image having a point-symmetrical structure stored in a volume data record, comprising:
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an image recording unit that records the volume data record; a data processing unit that is configured to; extract a portion of the volume data record containing the image of the point-symmetrical structure, select a set of points whose coordinates lie in the portion of the volume data record, measure a symmetry of the portion of the volume data record with respective to each of the set points, and identify a point from the set points as the midpoint of the point-symmetrical structure based on the measuring; and a storage unit that stores the coordinates of the midpoint.
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Specification