Researchers at MIT and the California Institute of Technology have developed a small, ingestible electronic sensor, whose location can be monitored, to help record symptoms of gastrointestinal disorders and reduce the need for more invasive screening. The developers think the sensor could be particularly useful for diagnosing gastrointestinal motility disorders such as gastroesophageal reflux disease and gastroparesis, as they are able to track its location and speed of progress through the gastrointestinal tract using electromagnetism. https://www.insideprecisionmedicine...-diagnose-gastrointestinal-motility-disorders
i remember many years ago a camera in pill form was supposed to revolutionise gastric diagnostics . what happened to that.