Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A focal nodular opacity in the right midlung is new from prior studies . The appearance is most suggestive of a healing rib fracture , however there is no history of interval trauma . Rounded retrocardiac opacity without definite correlate on the lateral view is atypical for a hiatal hernia , chest CT is recommended for further characterization . Contour irregularity of the lateral left eighth rib likely represents remote prior rib fracture . There is no focal consolidation , pleural effusion , pulmonary edema , or pneumothorax . The cardiomediastinal silhouette is stable . The osseous structures and upper abdomen are unremarkable .
    OUTPUT:
    
1 . No acute cardiopulmonary process . 2 . Focal nodular opacity in the right mid lung may represent a healing rib fracture and less likely a lung nodule . 3 . Rounded retrocardiac opacity likely corresponds to previously demonstrated paraspinal mass on MR of ___ and earlier CT abdomen studies .