Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The previously described nodular opacity is possibly seen projecting at the level of the first right rib on the LPO view , and not seen on the ___ view . The cardiomediastinal silhouette is unremarkable . No pleural effusions or pneumothorax . No acute or aggressive osseus changes .
    OUTPUT:
    
The previously described nodular opacity is possibly seen projecting at the level of the first right rib on the LPO view , and not seen on the ___ view . An underlying pulmonary nodule can not be excluded , suggest a CT thorax for further characterization .