Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . Cardiomediastinal silhouette is unremarkable . Right - sided opacity is a likely combination of small pleural effusion and atelectasis . Linear scarring in the mid zone of the right lung is unchanged from the prior exam , consistent with the prior right middle and lower lobe wedge resections . Mild pulmonary vascular congestion is noted . New right - sided total shoulder replacement . No pneumothorax or focal opacities concerning for an infectious process .
    OUTPUT:
    
New small right - sided pleural effusion and atelectasis . Mild pulmonary vascular congestion .