Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Right - sided dual - lumen central venous catheter tip terminates at the junction of the SVC and right atrium . Moderate cardiomegaly is re - demonstrated . The aorta is diffusely calcified . Mild pulmonary vascular congestion is improved compared to the previous study . Moderate size left and small right bilateral pleural effusions also appear somewhat improved . Opacities in the lung bases likely reflect areas of compressive atelectasis . Infection in the left lung base is not excluded . There is no pneumothorax . Remote left mid clavicular fracture is again noted .
    OUTPUT:
    
Mild pulmonary vascular congestion , improved in the interval with decreased size of moderate left and small right bilateral pleural effusions . Bibasilar airspace opacities likely reflect atelectasis though infection in the left lung base is difficult to exclude .