Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest radiograph demonstrates clear lungs bilaterally . Cardiomediastinal and hilar contours are stable in appearance . Right mediastinal convexity likely reflects mildly dilated or tortuous aorta . There is no pleural effusion . No pneumothorax is seen . Osseous structures demonstrates no acute abnormality . No air is seen the right hemidiaphragm .
    OUTPUT:
    
No convincing opacity concerning for pneumonia .