Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs demonstrate a normal cardiomediastinal silhouette . There is no focal consolidation , pleural effusion , or pneumothorax . Left base atelectasis is noted . There is no evidence of pneumomediastinum .
    OUTPUT:
    
No acute cardiopulmonary process . No pneumomediastinum .