Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac silhouette size is top normal . Mediastinal and hilar contours are unremarkable . Pulmonary vasculature is not engorged . Pleural parenchymal scarring is seen within the lung apices , more so on the right . No focal consolidation , pleural effusion or pneumothorax is demonstrated . 4 mm nodular opacity projecting over the eighth posterior rib on the left could reflect a pulmonary nodule or osseous lesion . Mild dextroscoliosis of the thoracic spine is present . No acute osseous abnormalities detected .
    OUTPUT:
    
1 . No acute cardiopulmonary abnormality . 2 . 4 mm nodular opacity projecting over the left eighth rib posteriorly . This could reflect a pulmonary nodule or a sclerotic focus within rib . Comparison with prior chest radiographs would be helpful to determine the stability of this finding for alternatively bilateral oblique views .