Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours are normal . Blunting of the costophrenic angle on the right may suggest a trace right pleural effusion . No focal consolidation or pneumothorax is identified . 6 mm nodular opacity is seen projecting over the left mid lung field and left ___ posterior rib . Remote left - sided rib fractures are noted .
    OUTPUT:
    
No radiographic evidence for pneumonia . Trace right pleural effusion . 6 mm nodular opacity projecting over the left mid lung field and ___ left rib posteriorly could reflect a pulmonary nodule or summation of shadows . Recommend oblique views for further assessment , or comparison with prior radiographs .