| 摘要 |
PROBLEM TO BE SOLVED: To provide a device non-invasively and easily extracting the cartilage of a knee joint, and positioning the shapes of the cartilage extracted at different times. SOLUTION: Volume data on the inside of the knee including the distal end of a femur are obtained by scanning the knee of a person largely bent as the person is seated on a chair, etc., with an ultrasonic beam by a mechanical three-dimensional probe 10. An image pre-processing part 22 and a cartilage extraction part 24 extract the edge on the obtained volume data to extract the tissue boundary, and extract the shape of the cartilage contour from the extracted tissue boundary based on the specification by a user, etc. The shape of the cartilage measured in the past is stored in a database 60, and a positioning part 62 positions the shape of the cartilage measured this time to the shape of the cartilage measured in the past stored in the database 60. At the time, the user is made to specify the loaded part of the cartilage and the longitudinal direction of the cartilage, etc., and the shape of the cartilage is positioned based on the specification. COPYRIGHT: (C)2010,JPO&INPIT
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