Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are linear bibasilar opacities most likely atelectasis . Small predominately subpulmonic right pleural effusion is similar compared to recent CT scan . Superiorly , the lungs are clear . The cardiomediastinal silhouette is within normal limits . No acute osseous abnormalities .
    OUTPUT:
    
Small right pleural effusion .