Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a small new opacification at the left costophrenic angle which could be secondary to a new small left pleural effusion ; however , an infectious process can not be ruled out . No other focal consolidations are seen . The heart size , mediastinal and hilar contours are normal . The left transverse pacemaker leads end in the right atrium and right ventricles , respectively . There is no pneumothorax .
    OUTPUT:
    
Small left base opacification likely secondary to pneumonia . Recommend treatment with antibiotics and repeat radiographs after treatment to assess for resolution . These findings were discussed with Dr . ___ at ___ :___pm by Dr . ___ by telephone on the day of the exam .