Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single portable upright chest radiograph was provided . There is a large right pleural effusion with associated compressive atelectasis of the right lower lobe , similar in appearance to the recent prior study . There is no definite focal consolidation however infection ca n't be entirely excluded in the right lower lung fields . There is no pneumothorax . Cardiomediastinal silhouette is unchanged . The left lung is clear . The bones are intact .
    OUTPUT:
    
Stable large right pleural effusion with associated atelectasis of the right lower lobe ; please note , infection in this area can not be entirely excluded .