Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal upright AP and lateral views of the chest were obtained . The lungs are well expanded and clear without focal consolidation , pleural effusion or pneumothorax . Heart size is normal . Mediastinal silhouette and hilar contours are within normal limits and unchanged from ___ . No acute osseous abnormality is identified .
    OUTPUT:
    
No acute intrathoracic process .