Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral radiographs of the chest demonstrate clear lungs and normal hilar and cardiomediastinal contours . There is no pneumothorax or pleural effusion . Pulmonary vascularity is normal . A ring - like opacity seen only on the lateral view is likely a confluence of shadows , however shallow - oblique radiographs should be obtained to exclude the possibility of a cavitary lung lesion .
    OUTPUT:
    
1 . No evidence of pneumonia . 2 . Ring - like opacity seen only on the lateral view is likely a confluence of shadows , however steep oblique radiographs ( ___ and ___ ) should be obtained to exclude the possibility of a cavitary lung lesion . Note : Impression # 2 was emailed to the Emergency Department Quality Assurance Nursing group for follow - up , since the patient was discharged from the ED at the time of attending review .