While a CT scan may be the best known method to confirm later stage cancers now, a better and safer way may yet be discovered that can track the cancer's growth long before a doctor would recommend a scan. Nanoparticles could be a promising way to do that. If we're constantly made aware of many possible risks, the anxiety will (probably) eventually diminish as long as those risks are safely monitored. Overexposure to risks (that were always there) might be just what we need to explore better ways to track medical conditions before it's too late for treatment.