Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a new focal heterogeneous opacity in the left upper lobe . Otherwise , the lungs are clear . The mild cardiomegaly is unchanged from the prior study . Otherwise , the hilar and cardiomediastinal contours are normal . There is no pneumothorax or pleural effusion . The pulmonary vascular markings are normal .
    OUTPUT:
    
Left upper lobe pneumonia . Findings were communicated to Dr . ___ by Dr . ___ ___ telephone on ___ at 11 :37 .