Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is mild to moderately enlarged with a left ventricular predominance . The mediastinal contours are unchanged . There is mild pulmonary vascular congestion , accentuated by the presence of low lung volumes . There is no focal consolidation , pleural effusion or pneumothorax present . Streaky atelectasis is noted in the lung bases . No acute osseous abnormality is detected .
    OUTPUT:
    
Mild pulmonary vascular congestion and mild bibasilar atelectasis .