Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . The heart is probably mildly enlarged . The mediastinum is not widened . Retrocardiac opacity may reflect some atelectasis , difficult to fully assess as there leads projecting over the left mid hemi thorax . There is mild pulmonary vascular congestion . No overt edema . No pleural effusion . No pneumothorax . No acute osseous abnormality .
    OUTPUT:
    
1 . Low lung volumes and mild pulmonary vascular congestion versus crowding in the setting of low lung volumes . 2 . Mild cardiomegaly . 3 . The mediastinum is not widened .