Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single AP upright portable view of the chest was obtained . There has been interval placement of a large - bore dual - lumen right central venous catheter , distal aspect not well seen , but likely terminating at the cavoatrial junction / proximal right atrium . The cardiac silhouette is mildly enlarged . There is a left base opacity , likely represents combination of pleural effusion and atelectasis . There is a moderate pulmonary vascular congestion . No pneumothorax seen .
    OUTPUT:
    
Left base opacity likely represents combination of pleural effusion and atelectasis although underlying consolidation can not be entirely excluded in the appropriate clinical setting . The above findings with mild enlargement of the cardiac silhouette and pulmonary vascular congestion suggest fluid overload / CHF .