Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left lower lobe micronodular opacities are new since yesterday . A small right effusion may be present . The left costophrenic angle is unchanged . No pneumothorax is present . The cardiac and mediastinal contours are normal . Multiple stable old posterior rib fractures .
    OUTPUT:
    
Rapid development of left lower lobe opacities more compatible with aspiration rather than infection .