Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear bilaterally . There are no focal consolidations , pleural effusions or pneumothorax . Cardiomediastinal silhouette is within normal limits . Mild calcification of the aortic arch . Moderate to large hiatal hernia is unchanged in appearance since ___ . Patient is status post left mastectomy . No acute osseous abnormalities .
    OUTPUT:
    
No acute intrapulmonary process to explain patient 's symptoms .