[Investment and operating costs of the electron beam scanner at the Broussais Hospital].

Cost of Imatron and of its building was 150,000,000 FF in 1989, highly more expensive than for other CT. Cost of "maintainance" is only 9.5% of its acquisition price against 21% for other CT. The replacement of high power and detectors is less frequent in Imatron than X ray tubes in the other CT. Imatron was often out of order during the 2 first years because of high power. Now the time devoted to break down is only 2.5%. A slice price is 4.75 FF for Imatron and the mean slice price is 7.38 FF for the other Assistance Publique CT (from 4.88 to 10.53).