Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest demonstrate normal heart size and normal mediastinal and hilar contours . There is linear atelectasis or scarring in the right base . Previously seen small right effusion has resolved . The lungs are otherwise clear without pneumothorax , vascular congestion , or pleural effusion .
    OUTPUT:
    
1 . No evidence of pneumonia . 2 . No evidence of pericardial effusion .