Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Slightly lordotic positioning . The cardiomediastinal silhouette is within normal limits . No CHF , focal infiltrate or effusion is identified . No pneumothorax is detected . A subtle 7 mm rounded density projects over the posterior left seventh rib , in the left mid zone laterally . This is not definitively identified on lateral view , but could correspond to a focal density projecting over the cardiac silhouette anterior to the hila . No other focal nodular densities are identified . No rib fracture is detected on these lung technique films .
    OUTPUT:
    
No acute pulmonary process is identified . In particular , no pneumothorax or pneumonic infiltrate is identified . Note is made of a 7 mm nodular density in the left mid zone laterally , equivocally visualized on the lateral view . Further assessment with chest CT is recommended .