Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Minimal atelectasis is noted in the left lung base . Otherwise , the lungs are clear . The cardiomediastinal silhouette , hilar contours , and pleural surfaces are normal . No pulmonary edema , pneumothorax , pneumonia , or pleural effusion .
    OUTPUT:
    
No acute cardiopulmonary process .