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Fig. 11B —Congenital left-sided pericardial defect suspected on posteroanterior chest radiograph of 38-year-old man. Excessive mobility of heart is shown on two unenhanced CT images obtained with cardiac gating (temporal resolution, 250 msec) at level of inferior pulmonary veins with patient in supine (A) and left lateral decubitus (B) positions. Note cardiac levorotation and increased contact between left ventricle and anterolateral thoracic wall in left lateral decubitus position (B).