Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiomediastinal silhouette is within normal limits . Lungs are clear except for linear bibasilar atelectasis or scar . Blunting of the left costophrenic sulcus is unchanged and corresponds to extrapleural fat on recent CT abdomen . There is no large effusion or pneumothorax .
    OUTPUT:
    
No acute intrathoracic process .