▁ ▁References ▁ ▁Category : 1 8 7 8 ▁birth s ▁Category : 1 9 1 4 ▁death s ▁Category : B rit ish ▁military ▁personnel ▁killed ▁in ▁World ▁War ▁I ▁Category : Pe ople ▁educated ▁at ▁St ▁John ' s ▁School , ▁Le ather head <0x0A> </s> ▁The ▁CT X ▁( Comput er ▁Tom ography ▁X - ray ) ▁is ▁an ▁explos ive ▁detection ▁device , ▁a ▁family ▁of ▁x - ray ▁devices ▁developed ▁by ▁In V ision ▁Techn ologies ▁in ▁ 1 9 9 0 ▁that ▁uses ▁C AT ▁sc ans ▁and ▁s oph istic ated ▁image ▁processing ▁software ▁to ▁automatically ▁screen ▁checked ▁b agg age ▁for ▁explos ives . ▁ ▁CT X - 5 0 0 0 ▁In ▁ 1 9 9 4 , ▁the ▁CT X - 5 0 0 0 ▁became ▁the ▁first ▁computed ▁tom ography ▁explos ive ▁detection ▁system ▁cert ified ▁by ▁the ▁US ▁Federal ▁A viation ▁Administration ▁( FA A ). ▁The ▁cert ification ▁of ▁the ▁CT X - 5 0 0 0 ▁followed ▁nine ▁years ▁of ▁development . ▁During ▁that ▁time ▁the ▁F AA ▁inv ested ▁$ 9 0 ▁million ▁in ▁explos ives ▁detection ▁and ▁nearly ▁$ 8 . 6 ▁million ▁in ▁the ▁specific ▁technology . ▁From ▁ 1 9 9 5 ▁to ▁ 1 9 9 7 , ▁the ▁CT X - 5 0 0 0 ▁was ▁tested ▁to ▁solve ▁the ▁challeng es ▁involved ▁in ▁integr ating ▁an ▁explos ives ▁detection ▁system ▁into ▁a ▁b agg age ▁system ▁and ▁to ▁validate ▁the ▁estimated ▁costs