▁of ▁wide - scale ▁deployment ▁of ▁the ▁systems . ▁ ▁CT X - 5 0 0 0 ▁SP ▁The ▁CT X - 5 0 0 0 ▁SP ▁sc anning ▁system , ▁an ▁improved ▁version ▁of ▁the ▁CT X - 5 0 0 0 ▁for ▁checked ▁b agg age , ▁was ▁delivered ▁to ▁the ▁F AA ▁in ▁ 1 9 9 7 ▁and ▁placed ▁at ▁several ▁of ▁the ▁US ' s ▁bus iest ▁and ▁largest ▁air ports . ▁From ▁ 1 9 9 7 ▁to ▁ 2 0 0 0 , ▁more ▁than ▁ 1 0 0 ▁of ▁the ▁systems ▁have ▁been ▁purchased ▁by ▁the ▁F AA ▁to ▁install ▁in ▁US ▁air ports , ▁according ▁to ▁In V ision . ▁ ▁CT X - 5 5 0 0 DS ▁The ▁CT X - 5 5 0 0 DS ▁is ▁an ▁autom ated ▁explos ives ▁detection ▁system ▁that ▁uses ▁computed ▁tom ography ▁to ▁character ize ▁materials ▁in ▁checked ▁b ags ▁and ▁automatically ▁identify ▁objects ▁that ▁could ▁be ▁impro vised ▁explos ive ▁devices . ▁The ▁CT X - 5 5 0 0 DS ▁is ▁the ▁most ▁widely ▁used , ▁F AA - cert ified ▁Ex pl os ives ▁D ete ction ▁System ▁in ▁the ▁world . ▁It ▁can ▁be ▁used ▁for ▁either ▁stand alone ▁applications ▁or ▁in ▁an ▁integrated ▁manner ▁with ▁air port ▁b agg age ▁handling ▁systems . ▁It ▁can ▁also ▁be ▁configured ▁to ▁detect ▁other ▁types ▁of ▁cont rab and ▁material . ▁The ▁CT X - 5 5 0 0 DS ▁has ▁an ▁F