Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP and lateral views of the chest are compared to previous exam from ___ . Previously seen small bilateral pleural effusions have resolved . The lungs are clear without consolidation or pulmonary vascular congestion . Cardiomediastinal silhouette is unchanged . Posterior bilateral old rib fractures are again seen . Osseous and soft tissue structures are unremarkable . Note is made of prosthetic aortic valve .
    OUTPUT:
    
No acute cardiopulmonary process . Resolution of previously seen bilateral pleural effusions .