Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of chest Given slightly lower lung volumes , the lungs are clear . Cardiac silhouette is normal in size . Mediastinal contours are normal . There is no pleural effusion , pneumothorax or pulmonary edema . There is no free air
    OUTPUT:
    
No evidence of acute cardiopulmonary process .