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Study of the X-ray attenuation as a function of the density and thickness of the absorbent: cortical bone and BaSO4

Andrea N. Vargas

Medical Physics Group, National University of Colombia

Abstract: Radiation protection is responsible for ensuring the safety of people against the harmful effects of ionizing radiation, which can occur even at low doses of radiation; however, there are procedures in which it is not possible to use the current radiation protection elements because these interfere in the expected results. In the present work, a non-metallic X-ray attenuator material is proposed, mainly for medical imaging applications. For this purpose, the filing of cortical bone and barium sulfate (BaSO4) were characterized using X-ray diffraction (XRD), energy dispersive X-ray analysis (EDX) and Raman spectroscopy techniques, obtaining information about the physical, chemical and structural properties of the materials. Attenuation capacity of the X-rays was determined using a X-ray equipment (10-30 kV) and a Geiger-Müller detector, bearing in mind that the intensity of the transmitted radiation depends on the thickness and density of the material, having a 1 mm lead sheet as a reference. In addition, a radiation attenuation comparison dose emitted by a dental X-ray generator using TLD-100 thermoluminescent crystals and periapical radiographic plates is presented, identifying that BaSO4 is the material that attenuates the better this type of radiation compared to cortical bone.

Seminar takes place on Tuesday, June 5th 2018 at 2:00 PM
in the IEAP meeting room, Praha 2 ‐ Albertov, Horská 3a/22.

doc. Dr. André Sopczak
seminar organizer
doc. Ing. Ivan Štekl, CSc.
director of IEAP
doc. Dr. André Sopczak
IEEE CS - NPSS chair

IEEE logoNUCLEAR & PLASMA SCIENCES SOCIETY CHAPTER
IEEE Czechoslovakia section
http://www.ieee.cz/en/nps

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