Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP and lateral chest radiograph demonstrates clear lungs bilaterally . Nodularity within the right upper lobe appears to been present on prior study dated ___ , unchanged , shown on CT to represent summation of shadows or artifact . Cardiomediastinal and hilar contours are within normal limits . There is no pleural effusion or pneumothorax . Visualized osseous structures demonstrates no acute abnormality . No air under the right hemidiaphragm is seen .
    OUTPUT:
    
No acute intrathoracic abnormality .