Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left port tip is in right atrium . Low lung volumes with clear lungs without pneumothorax or pleural effusion . Heart is top normal in size with normal mediastinal contour and hila . No bony abnormality .
    OUTPUT:
    
Normal chest radiograph . No pneumonia . Results conveyed via telephone to Dr . ___ by Dr . ___ on ___ at 12 :20 p .m . within five minutes of observation of findings .