Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single portable view of the chest compared to previous exam from ___ . Low lung volumes again noted . Increased interstitial markings throughout the lungs are again seen dating back to ___ . This could be due to chronic underlying lung disease and in part accentuated by portable technique and low lung volumes . There is no confluent consolidation . Cardiomediastinal silhouette is within normal limits . Osseous and soft tissue structures are unremarkable .
    OUTPUT:
    
No definite acute cardiopulmonary process . Increased interstitial markings throughout the lungs , likely chronic .