Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . There is no definite focal airspace opacity to suggest pneumonia . Bibasilar opacities likely reflect pericardial fat pads . The heart is exaggerated by AP technique and low lung volumes but likely larger since the prior study now with mild to moderate cardiomegaly . There is no pleural effusion or pneumothorax . The mediastinal and hilar contours are normal .
    OUTPUT:
    
1 . No convincing evidence of pneumonia . 2 . Heart size is larger with mild to moderate cardiomegaly .