Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours appear unchanged including mild cardiac enlargement with a left ventricular configuration . An eventration of the right hemidiaphragm is unchanged . There is no definite pleural effusion or pneumothorax . The lungs appear clear view . There is a nodule or focus projecting over the mid portion of the thoracic spine . Although , an artifact is suspected , it may be appropriate to perform further imaging to reassess .
    OUTPUT:
    
1 . No evidence of acute disease . 2 . Perihilar nodular focus projecting on the lateral view , probably an artifact associated with hilar structures . However , when clinically appropriate , repeat imaging including a lateral view may be helpful to see whether it were to persist .