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FIGURE 1. Software tool for realignment of misregistered CT and SPECT data. Using arrows of toolbar (left), CT can be moved in x-, y-, and z-axes relative to SPECT in order to match borders of left ventricle. In fusion images on right, dark lines depict myocardial borders of SPECT scan. In present case, CT was moved left and cranially to obtain alignment as illustrated by fused images in coronal, sagittal, and transaxial planes before and after realignment. Shifts are displayed in millimeters on toolbar and recorded for further analysis.
