Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal silhouette and hilar contours are within normal limits . There is persistence of low lung volumes without acute consolidation . There is no pneumothorax or pulmonary edema . Dextroconvex scoliosis is unchanged .
    OUTPUT:
    
1 . No acute cardiopulmonary process . 2 . There is persistence of hypoinflated lungs , which is unusual in the setting of COPD and may represent an underlying interstitial lung disease . If there is continued clinical concern , a dedicated CT exam could be helpful for further evaluation .