Abstract. Radiology has seen enormous growth with the latest medical equipment and increase in radiation technology usage. Lead is also used to shield against radiation leakage to diminish harmful effects of radiation dosimetry to human bodies. To save harmful, cost, effective shielding and provide easy installation, a pre-cast board with fiber concrete layers and heavyweight concrete with Barite is developed. The radiation attenuation coefficients for Barite concrete board are calculated and measured in this report. This board can instead of lead for the photon energy around the diagnostic medical areas. The board has been successfully employed in medical hospitals and makes shielding easy and effective.
Radiation is used in a variety of medical and scientific fields but poses potential danger to the human body. Hospital medical x-ray technicians traditionally use lead shielding materials to absorb radiation. However, lead has environmental disadvantages, with high toxicity to humans. Barite, a heavy-weight material, is added into concrete and bonded with xylem fiber, forming a shielding board as a replacement for lead. The xylem fiber barite shielding board (XFBSB) development and shielding properties are investigated in this report. XFBSB is designed for diagnostic medical x-ray shielding. It may be applied as shielding in walls and ceilings, doors and movable wall partitions. The physical properties of XFBSB are 14 mm in thickness with density ⩾ 2.0 g/cm3. This board was irradiated using a standard x-ray tube (Type MXR 320/Comet Y. TU 320 G03, TÜV NORD Sys Tec GmbH & Co. KG, German) with 70 kV, 100 kV and 150 kV Voltages respectively. The current of this standard x-ray tube is 22.5 mA, respectively. From the measured ambient dose equivalent H*(10), the attenuation factor F=H*(10) with board/H*(10) without board was calculated. For comparison, lead boards of 1, 2, 3, 4 and 6 mm thicknesses were irradiated under equal conditions with the attenuation factors F fitted for the different lead board thicknesses. The boards are proven to ⩾ 1mm lead equivalent in all irradiation energies. The XFBSB can substitute for lead shielding for photon energies around diagnostic medical areas. This board provides adequate shielding, is non-toxic, fire proof, easily installed and low cost.
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