Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable AP upright view of the chest was reviewed . A left subclavian line ends in the upper right atrium and if pulled back 2 cm would end at the cavoatrial junction . A focal opacity measuring 5 mm located over the ___ left posterior rib is most likley a bone island ; othwerise , the lungs are clear without focal consolidation , pulmonary edema , pleural effusion or pneumothorax . The cardiac and mediastinal contours are normal .
    OUTPUT:
    
1 . A focal opacity measuring 5 mm located over the ___ left posterior rib is most likley a bone island which could be confirmed with PA and lateral views . 2 . New left subclavian line ends in the upper right atrium and if pulled back 2 cm would end in the cavoatrial junction . Findings were telephoned to ___ by Dr . ___ at 16 :35 at the time of discovery .