Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Since ___ , significant improvement in right upper lobe pneumonia . Diminished vascularity in left upper lung fields consistent with probable emphysema . Port - a - cath ends at the level of the cavoatrial junction . The lung volumes are normal . Normal size of the cardiac silhouette . Normal hilar and mediastinal structures . No pneumonia , no pulmonary edema . No pleural effusions . No pneumothorax .
    OUTPUT:
    
Since ___ , significantly improvement and resolved right upper lobe pneumonia . Probable emphysematous changes in left lung .