Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac silhouette is stably prominent . The central pulmonary vasculature appears mildly engorged without overt edema . Linear atelectasis is noted . On the lateral view , there is vague posterior opacity at the left lung base . This may represent atelectasis , though infiltrate is not excluded . A small right pleural effusion is present .
    OUTPUT:
    
1 . Possible left lower lobe infiltrate in the appropriate clinical context . 2 . Small right pleural effusion .