Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP portable upright view of the chest . Multiple internal intact sternal wires and numerous surgical clips are unchanged in position . Again seen is central pulmonary vascular congestion without overt edema . There is no pneumothorax , focal consolidation , or pleural effusion .
    OUTPUT:
    
No acute intrathoracic process . This examination is unchanged since ___ .