Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest are compared to previous exam from ___ . Low lung volumes are again noted with crowding of the pulmonary vascular markings . There is no evidence of confluent consolidation or effusion . The cardiac silhouette appears slightly enlarged , but this is likely accentuated due to low inspiratory effort . This is unchanged from prior exam . Osseous and soft tissue structures are unremarkable .
    OUTPUT:
    
No definite acute cardiopulmonary process . Prominent cardiomediastinal silhouette is likely accentuated due to low lung volumes .