Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is top normal . Multiple sternal wires and mediastinal clips denote prior cardiac surgery . The central pulmonary vessels are not enlarged . There is no pneumothorax , focal consolidation , or pleural effusion . Bibasilar linear opacities denote atelectasis .
    OUTPUT:
    
No acute intrathoracic process .