Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Small pleural effusion in the posterior of two sulci , best seen on lateral and of indeterminate side . Mild left lower lobe atelectasis . No additional focal opacity , pneumothorax or pulmonary edema . Heart size , mediastinal contour and hila are normal . No bony abnormality .
    OUTPUT:
    
1 . Small pleural effusion , side indeterminant . 2 . Mild left lower lobe atelectasis . No pneumonia .