Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared to chest radiographs from ___ , small left pleural effusion has resolved . Slight prominence of interstitial markings , as well as hyperinflated lungs with flattening of the bilateral hemidiaphragms , suggest COPD . No pneumothorax . No central vascular congestion or overt pulmonary edema . Rounded opacity in the right perihilar region and 18 mm nodule opacity in the left upper lobe are new . Mediastinal and hilar contours are stable . Heart size is normal .
    OUTPUT:
    
1 . No pulmonary edema . 2 . Resolved small left pleural effusion . 3 . New rounded opacity in the right perihilar region and new 18 mm nodular opacity in the left upper lobe are new . Recommend follow - up chest CT for further evaluation .