Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: In comparison to the prior exam , the lung volumes are lower . There is minimal streaky linear opacification at the left base , most consistent with atelectasis . There is no evidence of pneumonia , pulmonary edema , pleural effusion , or pneumothorax . A stable vague opacity at the right cardiophrenic sulcus is unchanged , likely mediastinal fat . The cardiomediastinal silhouette is otherwise normal .
    OUTPUT:
    
Minimal left basilar atelectasis . No evidence of pneumonia .