The sensitivity of discontinuous diaphragm sign, absence of diaphragm, dangling diaphragm sign, hernia sign, collar sign, hump and band sign, dependent viscera sign, a sign of injury in both directions one side of the diaphragm in penetrating injury, transdiaphragmatic trajectory sign in penetrating injury are respectively 64.4%, 0%, 40%, 60%, 51.1%, 8.9%, 40%, 63.6%, 53.3%.