Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest demonstrate the lungs are hyperinflated , suggesting underlying emphysema . A linear area of atelectasis in the left lung base has slightly improved since the prior study . There is no evidence of pulmonary edema , pleural effusion , pneumothorax or focal consolidation concerning for pneumonia . The cardiomediastinal silhouette is stable .
    OUTPUT:
    
Linear atelectasis of the left lung base has improved since yesterday . No acute cardiopulmonary process .