If it is said that a certain instrument can do whole body examination, such instrument does not exist. First of all, for a whole body examination, you must first determine which aspect you are defining, whether it is a whole body bone examination, a whole body muscle examination or a whole body blood examination, if it is simply a whole body bone examination, PETCT can meet the requirements. But if by whole body examination we mean all of them, including bone, muscle, blood and so on, it is impossible to reach them completely by one instrument. The usual ultrasound, CT, MRI, etc. can only examine a certain part of the body or a certain part of the body. It is not possible for a machine to do all the items, so there is no instrument that can do the so-called whole body examination.