Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest . No prior . The lungs are clear of consolidation or effusion . There is nodular opacity projecting over the anterior left seventh rib . Cardiomediastinal silhouette is within normal limits . Osseous and soft tissue structures are essentially unremarkable .
    OUTPUT:
    
No acute cardiopulmonary process . Nodular density at the left lung base for which repeat shallow oblique films are recommended as this could be within the parenchyma or in the bone .