Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are normally expanded . Mild cardiomegaly is not significantly changed . The mediastinal and hilar contours are normal . Apparent opacity at the left base on the frontal projection has no correlate on the lateral view ; this is similar to the next most recent study . There is no convincing evidence of pneumonia .
    OUTPUT:
    
No acute cardiopulmonary abnormality . normal , right mastectomy , chronic mild cardiomeagly