Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is increased airspace opacification at the right base . A new band - like opacity at the left base is likely due to worsening infection or atelectasis . Over although the fine reticular nodular pattern of abnormality is not appreciably changed since the radiograph of 3 days prior . There is no new pleural effusion or pneumothorax . The heart and mediastinum are within normal limits .
    OUTPUT:
    
Involving multifocal pneumonia or aspiration .