Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest views were obtained with patient in upright position . Analysis is performed in direct comparison with the next preceding similar study of ___ . The heart size is unchanged and remains within normal limits . Unremarkable appearance of thoracic aorta . No pulmonary vascular congestion . No evidence of acute or chronic pulmonary infiltrates are present and no suspicious nodular lesions for metastatic process can be identified . Skeletal structures are grossly unremarkable with the exception of a local deformity with cortex thickening in the right hemithorax involving the right - sided fifth rib slightly posterior to the axillary midline and most likely representing an old healed rib fracture . The on previous examination suspected right - sided infrahilar pulmonary parenchymal abnormality can not be verified . On the present examination , the vascular structures in this area remain normal and the persistent pulmonary parenchymal abnormality can not be identified . Observe that the patient has undergone not less than ___ chest and torso CT examinations since ___ .
    OUTPUT:
    
Chest findings within normal limits . No evidence of secondary metastatic deposits or pulmonary masses as can be identified on routine PA and lateral chest .