Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs of the chest show an opacification projecting over the left heart on the frontal radiograph and the posterior lung base on the corresponding lateral radiograph consistent with left lower lobar pneumonia . No pleural effusion or pneumothorax is present . The pulmonary vasculature is not engorged . The cardiac silhouette is normal in size . The mediastinal and hilar contours are within normal limits .
    OUTPUT:
    
Left lower lobar pneumonia . A followup chest radiograph in four to six weeks after appropriate therapy is recommended to confirm resolution . Findings were communicated by Dr . ___ to Dr . ___ by phone at 13 : 15 p .m . on ___ .