Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is normal . A left - sided generator pack projects leads into the right atrium and ventricle . Multiple sternal wires and mediastinal clips denote prior cardiac surgery . There is no pneumothorax , focal consolidation , or pleural effusion . The central pulmonary vessels are prominent ; however , there is no congestion or edema .
    OUTPUT:
    
No acute intrathoracic process .