Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single portable view of the chest . The lungs are clear of consolidation . Coarse interstitial markings are seen suggestive of chronic underlying parenchymal changes . Cardiomediastinal silhouette is within normal limits . No acute osseous abnormality detected .
    OUTPUT:
    
No definite acute cardiopulmonary process .