Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . Cardiac sihouettle is mildly enlarged , slightly accentuated by low lung columes . Cardiomediastinal contours are otherwise unremarkable . Focal opacity seen in the left lower lobe , best seen on the lateral view . There is no other focal consolidation , pleural effusion , or pneumothorax . The upper abdomen and bones are grossly unremarkable .
    OUTPUT:
    
1 . Slightly enlarged cardiac silhouette accentuated by low lung volumes but component of pericardial effusion should be considered in this patient with pericarditis . Correlate with echocardiogram . 2 . Left lower lobe focal opacity , potentially atelectasis although infection is possible .