Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright and lateral chest radiograph demonstrates a normal cardiomediastinal silhouette . Opacity projecting over the left lower lung base has no correlate on the title chest radiograph . Right lung is clear . There is no pleural effusion or pneumothorax . No evidence of pulmonary edema . There is no air under the right hemidiaphragm . Partially imaged feeding tube is noted projecting over the left hemi abdomen .
    OUTPUT:
    
Opacity projecting over the left lower lung zone is noted possibly sequela of aspiration or infectious process . No air under the right hemidiaphragm .