Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs demonstrate clear lungs . There is mild interstitial abnormality , which is not significantly changed compared with prior . The pulmonary vasculature appears normal . The cardiac silhouette is normal in size , the mediastinal contours are normal . A small calcified probable granuloma is again noted in the left upper lobe . ___ % vertebral body height loss of a thoracic vertebral body is again noted , and unchanged . There is prior fracture deformity of posterior left seventh rib , unchanged .
    OUTPUT:
    
No acute chest abnormality .