Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is top normal . Cardiomediastinal silhouette is unremarkable . Hilar contour is normal . A pacemaker is implanted in the left upper chest with right atrial and right ventricular leads . Lungs are clear without focal consolidation , effusion or pneumothorax . No acute bony abnormality is identified .
    OUTPUT:
    
No acute intrathoracic process .