Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are hyperinflated with flattening of the hemidiaphragms , consistent with COPD . There is an area of heterogeneous opacification in the posterior aspect of the left base , Likely pneumonia . There is no pleural effusion or pneumothorax . There is no vascular engorgement or pulmonary edema . Moderate cardiomegaly is unchanged . Aorta is calcified and minimally unfolded .
    OUTPUT:
    
Probable small left lower lobe pneumonia . No vascular engorgement or pulmonary edema .