Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac and mediastinal silhouettes are stable . There is minimal basilar atelectasis . No focal consolidation is seen . There is no evidence of pneumothorax . Slight blunting of the posterior left costophrenic angle may be due to a trace pleural effusion versus pleural thickening / atelectasis . The bones are relatively osteopenic . No obvious fracture is identified , however , this study has limited sensitivity for the detection of such .
    OUTPUT:
    
Slight blunting of the posterior left costophrenic angle may be due to a trace pleural effusion versus pleural thickening / atelectasis . No focal consolidation to suggest pneumonia . Left base atelectasis .