Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest are compared to previous exam from ___ . There are low lung volumes on the current exam . Within this limitation , the lungs , however , do appear clear and there is no pleural effusion . The cardiomediastinal silhouette is within normal limits and unchanged from prior given differences in positioning . Osseous and soft tissue structures are unremarkable .
    OUTPUT:
    
No evidence of acute cardiopulmonary process .