Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single AP view of the chest is compared to previous exam from ___ . The lungs remain clear . Blunting tf the right costophrenic angle suggests a small effusion versus pleural thickening . Cardiomediastinal silhouette is within normal limits . Osseous and soft tissue structures are unremarkable .
    OUTPUT:
    
No acute cardiopulmonary process .