Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low resulting in bronchovascular crowding . No overt interstitial edema is identified , though there may be a touch of vascular congestion . There is no large pleural effusion . No confluent consolidation or pneumothorax is evident . Mediastinal contours appear mildly widened , though hypodense , findings suggestive of mediastinal lipomatosis . There is mild cardiomegaly .
    OUTPUT:
    
1 . Low lung volumes , though no consolidation or pleural effusion 2 . No pathologic mediastinal widening 3 . Mild cardiomegaly