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Figure 1 Fusion of 18-Fluorodeoxyglucose Positron Emission Tomography and CT Images
Contrast-enhanced computed tomography (CT) demonstrates all cardiac chambers (right ventricle [RV]; left ventricle [LV]) and metal artifact of internal defibrillator lead (M) in right atrium. Significant wall thinning (arrows) was noted in the apical and lateral LV wall consisting with myocardial infarction (top panels). A matching decrease in signal intensity in apical and lateral wall segments was observed in images obtained with positron emission tomography. Preserved metabolism of papillary muscle (P) was noted. Note the areas of preserved metabolic activity (A) within the lateral wall, which appears uniformly thinned by CT images and may represent surviving myocardium within the infarcted area (middle panels). Positron emission tomographic images are fused with corresponding CT datasets to allow the visualization of metabolic and anatomic datasets. The left ventricular wall is divided into apical (Ap), mid, and basal sections for further analysis with the use of a conventional 17-segment model (bottom panels).
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