Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Poor penetration technically limits this evaluation . Other than scattered areas of atelectasis such as in the left mid lung zone , the lungs are clear with no focal opacities concerning for pneumonia . There are no pleural effusions or pneumothorax . The cardiomediastinal and hilar contours are normal . Pulmonary vascularity is not increased .
    OUTPUT:
    
Limited examination . No obvious acute cardiopulmonary process .