| 摘要 |
When estimating a position or orientation of a patient's heart, a mesh model of a nominal heart is overlaid on a SPECT or PET image of the patient's heart and manipulated to conform to the image of the patient's heart. A mesh adaptation protocol applies opposing forces to the mesh model to constrain the mesh model from changing shape and to pull the mesh model to the shape of the patient's heart. A heart orientation estimator (60) iterates the mesh adaptation protocol a predetermined number of times, after which it defines a long axis of the left ventricle of the patient's heart as a line passing through the center of the mitral valve and the center of mass of the left ventricle. The long axis is then employed by a reorientation processor (70) to reorient the SPECT or PET image of the patient's heart, over which the mesh model was originally laid, to improve the accuracy of the PECT or PET image.
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