Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is left apical opacity which correlates with previously seen presumably post radiation fibrosis . Given differences in technique , the appearance has not significantly changed . The lungs are otherwise clear despite relatively low lung volumes . The cardiomediastinal silhouette is within normal limits . Median sternotomy wires are intact . No acute osseous abnormalities .
    OUTPUT:
    
No acute cardiopulmonary process .