Page 214 - 00. Complete Version - Progress Report IPEN 2014-2016
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214   Nuclear Science and Technology | Progress Report





               tions. The data sheets and all information in   lished at calibration laboratory.
               relation to the new procedures were integrat-
               ed in one database. The improvements imple-     Metrology in Diagnostic Radiology
               mented have reduced costs and increased pro-
               ductivity.                                     The Calibration Laboratory has since 1980 been
                                                              calibrating instruments used in radiation pro-
               Diagnostic Radiology                           tection and therapy measurements and be-

                                                              longing to hospitals, industries, clinics and
               It was developed the improvement of one cal-   other users located in São Paulo and in other
               ibration procedure of mammography dosime-      parts of Brazil.
               ters (ionization chambers) to be applied at clin-
               ical X-ray system of the calibration laboratory   Since 2000, calibration service is being offered
               (IPEN-CNEN/SP). The clinical X-ray system was   to users of diagnostic radiology instruments
               studied in their behavior, or tested with re-  with the establishment of standard radiation
               spect to their response such as: repeatability,   quality at this level.
               reproducibility of the nominal voltage, current
               and air kerma rate. The results obtained show   At the radiation protection level, there are spe-
               the possibility to use the clinical X-ray system   cial set-ups with gamma (60Co and 137Cs),
               in calibration procedures. After those studies,   beta (90Sr + 90Y, 204Tl and 147Pm), alpha
               one calibration procedure of mammography       (241Am, 233U, 238Pu, 244Cm, etc.) and low
               dosimeters (ionization chambers) was estab-    energy X radiations (60 kV).










































               Figure  17 -  X radiation calibration system.





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