Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: In comparison to prior chest radiograph striated lucencies along supraclavicular region have decreased consistent with reduction of artifact from overlying external structures to the patient . . The lungs are well - expanded and clear . Persistent right lateral costophrenic angle blunting . Heart size , mediastinal contour , and hila are unremarkable .
    OUTPUT:
    
1 . Previously reported soft tissue findings were secondary to structures external to the patient . 2 . No pneumonia . 3 . Lateral blunting of right costophrenic sulcus , which may reflect pleural thickening or small effusion . .