Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Since the ___ examination , there has been interval resolution of left pleural effusion . The heart size is top normal . Sternal wires and mediastinal clips denote prior cardiac surgery . There is no pneumothorax , focal consolidation , or pleural effusion . Linear bibasilar opacities are compatible with atelectasis .
    OUTPUT:
    
No acute intrathoracic process .