Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac silhouette size is normal . Mediastinal and hilar contours are normal . Lungs are clear . Subsegmental atelectasis is seen in the lung bases . No focal consolidation , pleural effusion or pneumothorax is present however the extreme left costophrenic angle is excluded from the field of view . There are no acute osseous abnormalities .
    OUTPUT:
    
No acute cardiopulmonary abnormality .