FINDINGS:
Peripheral opacity at the right mid lung laterally is identified. The margins
 of the adjacent right fourth rib laterally are not clearly delineated and
 could be focally eroded. There is eventration of the right hemidiaphragm.
 There is no effusion or pneumothorax. Cardiomediastinal silhouette is within
 normal limits. Tortuosity of the descending thoracic aorta.

IMPRESSION:
Focal opacity at the lateral aspect of the right lung. Associated right
 lateral fourth rib appears focally eroded and could be related therefore chest
 CT is suggested to further assess for underlying mass. Otherwise, no acute
 cardiopulmonary process.