Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: 2 views were obtained of the chest . The lungs are well expanded and clear with linear opacities in the right lower lung which is unchanged and may reflect an accessory fissure with surrounding atelectasis . No focal consolidation is seen to suggest infectious process . Linear right upper lung opacities and accompanying pleural thickening may relate to prior radiation therapy . There is no pleural effusion or pneumothorax . The heart and mediastinal contours are unremarkable .
    OUTPUT:
    
No acute intrathoracic process .