Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single portable view of the chest . New compared to prior is diffuse interstitial opacity in the left lung . The right lung is essentially clear with the exception of a partially calcified nodule in the right mid lung . Cardiomediastinal silhouette is stable . No acute osseous abnormalities detected .
    OUTPUT:
    
Left lung pneumonia . Repeat after treatment is suggested to document resolution .