Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is normal in size . The mediastinal and hilar contours appear within normal limits . Streaky basilar opacities , more confluent on the left than the right , are most consistent with atelectasis , increased since the prior study , although not widespread . Slight blunting of the left costophrenic sulcus makes it difficult to exclude a trace pleural effusion , but there is no definite effusion .
    OUTPUT:
    
No evidence of acute cardiopulmonary disease .