Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild to moderate cardiac silhouette enlargement appears similar compared to the previous exam . The aorta is diffusely calcified and mildly tortuous . The mediastinal and hilar contours are similar . Mild pulmonary vascular congestion is worse in the interval . Retrocardiac and right basilar opacities likely reflect atelectasis . No large pleural effusion is demonstrated with chronic pleural thickening noted at the lung bases . Multilevel mild to moderate degenerative changes are seen in the thoracic spine .
    OUTPUT:
    
Mild pulmonary vascular congestion , slightly worse in the interval with continued patchy atelectasis in the lung bases .