02403naa a2200313 a 450000100080000000500110000800800410001910000160006024500630007626000090013930000150014852014840016365000130164765000150166065000150167565000150169065300170170565300160172265300200173865300200175870000200177870000170179870000190181570000200183470000200185470000190187470000200189377301760191310267892010-03-03       1994    bl ---       0--  u    #d1 aCESAREO, R.  aIndustrial applications of tomography and microtomography.  c1994  ap.295-302.  aVarious CT-scanners have been designed and built at the University of Rome "La Sapienza" since 1980, also in cooperation with the Research Center EMBRAPA-NPDIA, Sao Carlos, S.P., Brazil, and with the financial support of the European Communities. These CT-scanners were mainly devoted to non-medical applications (soil physics, archaeometry, industrial applications) or to test new imaging methods (differential tomography, microtomography, XRF-tomography and so on). Besides the first CT-scanner, constructed in 1980, and the Sao Carlos scanner, constructed in 1986, both characterized by an Am241 source emitting 60keV radiation, and by non-sophisticated mechanics, the more recent scanners consist of: -a X-ray tube of 160kV and 10mA for tomographs of large objects (approximately from 1cm to 40cm diameter) and a X-ray tube of 50kV and 30mA for tomogra[hs of small objects or microtomographs (approximately from few mm to 1cm); -a sophisticated translation-rotation system, able to make movements with micrometer precision; -a single X-ray detector, such as Nal(TI)-scintillator, or a Si-PIN photodiode, or a HpGe for special applications where a high energy resolution is required, or -a multidetector system, such as an image intensifier for images of large objects, or a photodiode-array, for microtomography; various types of PC's, of the 286 and 486 type, for both driving the mechanics, andcollecting the transmission data, and for image reconstruction and filtering...  aindustry  atomography  aIndústria  aTomografia  aApplications  aCT-scanners  aMicrotomografia  aMicrotomography1 aAPPOLONI, C. R.1 aBRUNETTI, A.1 aCASTELLANO, A.1 aCRUVINEL, P. E.1 aDE ASSIS, J. T.1 aGIGANTE, G. E.1 aMASCARENHAS, S.  tIn: INTERNATIONAL SYMPOSIUM ON COMPUTERIZED TOMOGRAPHY FOR INDUSTRIAL APPLICATIONS, June 1994, Berlin, Alemanha. Proceedings... Berlin: Bundesministerium des Innern, 1994.