Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest demonstrate normal cardiomediastinal silhouette . The lungs are clear without pneumothorax , vascular congestion , or pleural effusion . Minimal basilar atelectasis may be present on the left .
    OUTPUT:
    
No acute cardiopulmonary process . Trace left basilar atelectasis .