Scientists are developing a medical device that could tell them more about the human body, and help them develop more-effective treatments for cancer, heart disease and brain disorders. It would be the world’s first full-body PET scanner. PET stands for Positron Emission Tomography. PET scanners create 3-D images of what is happening in the body. Researchers are calling the large scanner that they are developing Explorer. It will give medical workers images of what is happening in the entire human body that have never been seen before. PET scanners now give doctors images of only parts of the body. The U.S. National Institutes of Health gave a research team at the University of California at Davis $15.5 million to build the scanner. Ramsey Badawi is a professor of radiology at UC Davis. He says the scanner will give researchers new information about how human organs work together.