Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is heterogeneous opacification of the posterior left lower lobe , which is more pronounced than on the prior radiograph . The lungs are otherwise clear . The cardiomegaly is stable . The hilar and cardiomediastinal contours are normal . There is no pneumothorax or pleural effusion . Pulmonary vascular markings are normal .
    OUTPUT:
    
Early pneumonia in the posterior segment of the left lower lobe . Findings were communicated to Dr . ___ by Dr . ___ ___ telephone on ___ , at 11 : 17 .