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 patient is status post sternotomy related to previous bypass surgery . The heart size is at the upper limit of normal variation but stable in comparison with the previous study . Unchanged normal appearance of thoracic aorta . No pulmonary vascular congestion and no evidence of acute parenchymal infiltrates . The lateral and posterior pleural sinuses remain free . No pneumothorax detected in the apical area on frontal view . Skeletal structures demonstrate mildly accentuated kyphotic curvature in the thoracic spine with moderate degree of degenerative changes , but no evidence of vertebral body compression .
    OUTPUT:
    
Unchanged stable appearance of chest findings in this patient with history of previous bypass surgery . No evidence of new pulmonary congestion or acute infiltrates .