Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Prominence of the left upper heart border and or main pulmonary artery segment are unchanged compared to the study from 4 days ago but more prominent than the ___ film . Cardiac size is enlarged , again unchanged compared to a few days ago but increased compared to ___ . Perihilar vascular congestion does not appear prominent and no definite pleural effusions are seen . The soft tissues of the upper arms obscure the retrosternal air space on the lateral view .
    OUTPUT:
    
Abnormal but unchanged convexity to the left upper heart border / main pulmonary artery segment without overt CHF .