Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lungs are clear . Cardiac size is normal . Mediastinal contours are unremarkable . There is slight blunting of the left costophrenic angle which is a chronic appearance since ___ . There is no evidence of pneumonia , or pulmonary edema or pneumothorax . No fractures are identified on these non-dedicated films .
    OUTPUT:
    
No evidence of acute cardiopulmonary process .