CONICET | Buscador de Institutos y Recursos Humanos

Characterization of this detector is important for different clinic applications of 2-D and 3-D imaging[1,2,3] such asintraoperatory images with C-arm[4]. Determination of detection uniformity and resolution of flat panel detectors, is usefulfor enhancement of this imaging procedures with diagnostic purposes. So, a solid state flat panel detector, might be used to obtain quantitative information of a biological sample with good results.In this work, quantum efficiency curve is measured experimentally for solid flat panel detector, in accordance with the x 1X-ray tube energy ranges available at LIIFAMIR laboratories. A rigorous method using quasi-monoenergetic photons offluorescence is shown to accomplish this task, finding a good approximation of the efficiency as a function of energy[5].This function might be used to make exact corrections for efficiency in medical imaging tasks.The resolution uniformity of the X-ray detector has also been measured via P SF [6] experimental determinations. Forthis, different collimations of the X-ray beam were used, trying to emulate in the most accurate way the P SF in seve-ral regions of detection. The aim was to cover the net area of detection as seen with the complete field (no collimation at all).In this context, it was possible to determine successfully response uniformity and quantum efficiency of the Varian xPaxScan 2020+ CsI scintillator detector of the integral imaging beamline at LIIFAMIR .[1] Vedantham S et al, Medical Physics 27-3 (2000)[2] Bartling SH et al, Dentomaxillofacial Radiology (2014)[3] Baba R, Ueda K and Okabe M, Dentomaxillofacial radiology (2014)[4] Siewerdsen JH et al, Medical Physics 32-1 (2005)[5] Knoll G, Radiation detection and measurement 3rd Ed. (2000)[6] Metz C E and Doi K, Physics in medicine and biology 24-6 (1979) 0031-9155