Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Chest PA and lateral radiograph demonstrates unremarkable mediastinal , hilar and cardiac contours . Minimal faint opacity in the right lower lung likely reflects atelectasis . No opacification concerning for pneumonia identified . No definitive pleural effusion evident . No evidence of pneumothorax is seen . Degenerative changes are seen along the spine .
    OUTPUT:
    
No acute intrathoracic process .