See assigment below

Some companies promote whole-body scans as health screens that consumers may purchase.  Many parents request CT scans when they take an injured child to the ER.  There is growing concern that widespread and repeated use of this technology is exposing adults and children to potentially high levels of radiation from procedure that may not be medically necessary.  How can consumers evaluate the health risks versus benefits of these procedures?  What is the government's role in regulating these commercial ventures?