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 ___ . Given differences in positioning and technique , there has been no significant interval change . Lungs are essentially clear . There is no effusion . Cardiomediastinal silhouette is within normal limits for technique . Osseous and soft tissue structures are unremarkable .
    OUTPUT:
    
No acute cardiopulmonary process .