s . ▁The ▁CT X - 9 0 0 0 ▁D Si ▁is ▁designed ▁for ▁integrated ▁air port ▁install ations . ▁Its ▁ 1 - met re ▁wide ▁convey or ▁coordinates ▁with ▁standard ▁air port ▁b agg age ▁handling ▁systems . ▁The ▁system ' s ▁architecture ▁util izes ▁mod ular ▁components , ▁helping ▁to ▁ease ▁sc anner ▁upgrad ing ▁and ▁serv icing . ▁The ▁sc anner ▁contains ▁ 4 ▁active ▁radiation - sh ield ing ▁cur tain s . ▁In ▁addition , ▁the ▁g antry ▁rot ates ▁at ▁ 1 2 0 ▁R PM , ▁en abling ▁a ▁slice ▁image ▁to ▁be ▁generated ▁within ▁half ▁a ▁second . ▁A ▁high - speed ▁R F ▁data ▁link ▁connect s ▁the ▁rot ating ▁g antry ▁to ▁the ▁station ary ▁part ▁of ▁the ▁unit . ▁An ▁air - condition ing ▁unit ▁ens ures ▁high ▁performance ▁and ▁reli ability ▁in ▁hot , ▁dust y ▁and ▁hum id ▁air port ▁environments . ▁ ▁Compet ition ▁In ▁the ▁late ▁ 1 9 9 0 s , ▁L - 3 ▁Communic ations ▁developed ▁a ▁compet ing ▁computer ized ▁tom ography ▁system ▁that ▁also ▁met ▁F AA ▁appro val , ▁however ▁it ▁was ▁not ▁T SA ▁Qual ified ▁until ▁late ▁ 2 0 0 2 . ▁In ▁November ▁ 1 9 9 9 , ▁the ▁F AA ▁awarded ▁a ▁contract ▁worth ▁up ▁to ▁US $ 7 5 ▁million ▁to ▁L - 3 ▁to ▁purchase ▁up ▁to ▁ 6 0 ▁of ▁its ▁explos ive ▁detection ▁systems . ▁The ▁e X am iner