Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are free of focal consolidations , pleural effusions or pneumothorax . There is no pulmonary edema . Mild left retrocardiac atelectasis , improving ___ ___ . Cardiomediastinal silhouette within normal limits . No acute osseous abnormalities are identified .
    OUTPUT:
    
No acute cardiopulmonary process . Mild left retrocardiac atelectasis .