Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size remains mildly enlarged with a left ventricular predominance . Mediastinal contour is unchanged . Mild pulmonary vascular congestion is improved compared to the previous exam with similar small bilateral pleural effusions . Atelectasis is noted in the lung bases without new areas of focal consolidation . No pneumothorax is present . There are moderate degenerative changes present in the thoracic spine .
    OUTPUT:
    
Mild pulmonary vascular congestion , improved from the previous study . Small bilateral pleural effusions , unchanged .