Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac silhouette is mildly enlarged . There is calcification of the aortic knob . The hilar and mediastinal contours are otherwise normal . There is no focal consolidation , pleural effusion or pneumothorax . There is a left - sided Bochdalek hernia .
    OUTPUT:
    
No acute cardiopulmonary process .