Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well expanded and clear . Hila and cardiomediastinal contours are normal . Blunting of the left costophrenic angle is seen to correspond to fat on previous CT of the abdomen and pelvis . No pneumothorax .
    OUTPUT:
    
Normal chest radiograph . No abnormality to explain the patient 's symptoms .