Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . There is a subtle nodular opacity at the right lung apex projecting at the overlap between the right clavicle and right first rib , appears more conspicuous than on prior exam , possibly a pulmonary nodule . Please correlate with nonemergent chest CT . Otherwise lungs are clear . There is no pleural effusion , pneumothorax . The cardiomediastinal silhouette is normal . Imaged osseous structures are intact . No free air below the right hemidiaphragm is seen .
    OUTPUT:
    
Subtle nodular opacity at the right lung apex for which nonemergent chest CT may be performed to further assess .