Verfahren zur Messung des ventrikulären Volumens

摘要

A first image and a second image of a patient's heart region are taken at small time displaced intervals. The first and second images are subtracted to generate a difference image which is indicative of the tissue which has moved during the short time interval, i.e. the boundary of the ventricles. Voxels from regions outside the boundary are adjusted to remove lung tissue, and ventricle boundary or edge voxels and analyzed to generate a non-blood tissue histogram (62). Voxels within the boundary are analyzed to generate a blood tissue histogram (60). The histograms (60, 62) are fitted to smooth curves (68, 76) which represent the probability distribution of whether each voxel value represents blood or no-blood tissue. Contiguous voxels within the boundary are counted and adjusted for voxel size to create an indication of left and right ventricle volume. In the preferred embodiment, the ventricle volume is determined by summing the confidence value that each voxel within the boundary represents blood.