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DOSIS DE RADIACIÓN Y CALIDAD DE IMAGEN EN UN EQUIPO DE CARDIOLOGÍA INTERVENCIONISTA PEDIÁTRICO
Ist Teil von
Interciencia, 2014-07, Vol.39 (7), p.518
Ort / Verlag
Caracas: Interciencia
Erscheinungsjahr
2014
Link zum Volltext
Quelle
EZB Electronic Journals Library
Beschreibungen/Notizen
In this paper, the optimized methodology and results of the new characterization in terms of dose and image quality of the x-ray system used in the main service of pediatric hemodynamics of Chile is presented. In addition, scatter dose rate values at the level of the eyes of operators in different thickness of absorbing medium and all acquisition modes available in the angiography are also presented. The characterization was performed according to the European protocols DIMOND and SENTINEL adapted to pediatric procedures. The entrance surface air kerma (ESAK) was measured. The image quality parameters signal-to-noise ratio and figure of merit were calculated. The scatter dose rate was measured in units of personal equivalent dose. The ESAK for fluoroscopic modes is ranged from 0.2 to 35.6 μGy/frame from 4 to 20 cm of polymethyl methacrylate (PMMA). For the cine mode, those values oscillated between 2.8 and 160.1 μGy/frame. The values of the parameters of quality of image show a correct configuration of the system, although in medium fluoroscopic mode abnormal values are observed.