Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is mildly enlarged , and allowing for differences in technique , likely is slightly increased compared to the prior study . The aorta remains tortuous . The mediastinal and hilar contours are within normal limits . The pulmonary vascularity is not engorged . The lungs are hyperinflated . Emphysematous change is redemonstrated . Consolidative opacity in the left lower lobe is concerning for pneumonia . Right lung is grossly clear . There is likely a trace left pleural effusion . No pneumothorax is demonstrated .
    OUTPUT:
    
Left lower lobe consolidative opacity concerning for pneumonia . Followup radiographs after treatment are recommended to ensure resolution of this finding . Probable small left pleural effusion .