A tracker inside your body.

In the future Doctors can possibly be able to put this tracker inside of your body that could track tumors. You can pinpoint the location of ingestible implants using low power wireless signals. This can also help you get a better glimpse in a less expensive, invasive and time consuming matter.  Proving to be very beneficial if this is possible. In the animal tests they did they were able to track implants with centimeter level  accuracy. My thoughts on this are that this could be something great for people, and doctors. I like this idea and i think that this should definitely be a thing.