Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest . The lungs , heart , mediastinum , and pleural surfaces are normal . There is no evidence of pneumonia . There is no pneumothorax or pleural effusion . There is no mediastinal widening .
    OUTPUT:
    
No evidence of pneumonia . No radiographic evidence to explain patient 's symptoms .