Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a moderate loculated right - sided pleural effusion , similar in size to the ___ CT . In the left lung base , there are ill - defined pulmonary opacities which likely represent a combination of scarring and atelectasis , though an infectious process is not excluded . Cardiomediastinal silhouette shows evidence of mild pulmonary vascular congestion .
    OUTPUT:
    
1 ) Moderate right - sided pleural effusion , similar in size to the CT from ten days ago . 2 ) Left lung basilar opacity , likely a combination of atelectasis and scarring , though possible pneumonia in the correct clinical setting can not be excluded . 3 ) Mild pulmonary vascular congestion .