Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are relatively low lung volumes . No definite focal consolidation is seen . There is no large pleural effusion or pneumothorax . The cardiac silhouette size is top - normal to mildly enlarged . Mediastinal contours are unremarkable .
    OUTPUT:
    
Top - normal to mildly enlarged cardiac silhouette size . Otherwise , no acute cardiopulmonary process .