Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single portable view of the chest is compared to previous exam from ___ . Low lung volumes are again seen . Streaky opacity at the left lung base suggestive of atelectasis . The lungs are otherwise clear of consolidation or large effusion . Cardiomediastinal silhouette is stable in configuration noting mitral annular calcifications . Osseous and soft tissue structures are unremarkable .
    OUTPUT:
    
No definite acute cardiopulmonary process .