Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were compared to previous exams from ___ , including x-ray and CT from that day . The lungs are clear of focal consolidation or effusion . Focal nodular opacity projecting over the left lung base is compatible with bone island in the anterior left sixth rib . Cardiomediastinal silhouette is stable as are the osseous and soft tissue structures .
    OUTPUT:
    
No acute cardiopulmonary process . No evidence of congestive failure or focal consolidation .