Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . This exaggerates the cardiac silhouette size which appears mildly to moderately enlarged . The mediastinal and hilar contours are unremarkable . There is crowding of bronchovascular structures without overt pulmonary edema . Patchy opacities the lung bases may reflect atelectasis . No focal consolidation , pleural effusion or pneumothorax is detected . No acute osseous abnormality is visualized .
    OUTPUT:
    
Patchy opacities in lung bases likely reflects atelectasis given the presence of low lung volumes , but infection is difficult to exclude in the correct clinical setting .