Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is mildly enlarged . The mediastinal and hilar contours are unremarkable . Lung volumes are slightly low . Crowding of the bronchovascular structures is present without overt pulmonary edema . Patchy ill - defined opacities are noted within both lung bases and upper lobes , more pronounced within the right upper lobe and left lung base , concerning for diffuse infection or aspiration . No pleural effusion or pneumothorax is visualized .
    OUTPUT:
    
Multifocal ill - defined opacities concerning for infection or aspiration .