Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Supine portable view of the chest demonstrates low lung volumes . No pleural effusion or focal consolidation . Hilar and mediastinal silhouettes are unchanged . Calcifications of the aortic arch are again noted . The descending aorta appears tortuous . Heart size is normal . Mild interstitial pulmonary edema is noted . There is no pneumothorax . Partially imaged upper abdomen is unremarkable .
    OUTPUT:
    
Low lung volumes and mild interstitial pulmonary edema .