Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs of the chest show clear lungs without pleural effusion , focal consolidation , or pneumothorax . There is no appreciable pulmonary nodule . The pulmonary vasculature is not engorged . The cardiac silhouette is normal in size . The mediastinal and hilar contours are within normal limits . The aortic knob is partially calcified .
    OUTPUT:
    
1 . No acute cardiopulmonary process . 2 . No appreciable pulmonary lesions by radiography . Given the patient 's history of breast cancer , a followup CT would be recommended to exclude endobronchial lesions which are radiographically occult .