TY - JOUR ID - TI - Assessment of Secondary Shielding of the Mammography Room of Al-Hussaini Hospital in Karbala City, Iraq AU - Header S. Jaafer, AU - Abdullah A. Rasheed PY - 2013 VL - 6 IS - 2 SP - 1648 EP - 1654 JO - Karbala Journal of Medicine مجلة كربلاء الطبية SN - 19905483 29580889 AB - X-ray equipment must be installed in adequately shielded rooms to ensure that publicin the vicinity of the x-ray installations are not unduly exposed to x-ray radiation.The adequacy of shielding depends on the material and thickness used for thispurpose. This work therefore studies the secondary shielding of the mammography room. Byconsidering the mammography room design and the radiographic devices profiles used , theclinical total workload per week and total workload per patient have been computed and itsdistribution according to the most widely used voltages has been determined by recording theactual clinical technical values of maximum ,average and minimum mAs and thecorresponding values of kilovolt peak for 2119 women over six months. As a diagnostic xrayradiation shielding reference, the National Council on Radiation Protection andMeasurements report No.147 (NCRP report No.147) and XRAYBARR computer programhave been used to compute the secondary barrier thicknesses of Gypsum and Wood of themammography room.. It is found that the total workload per week and the total workload perpatient of the room were about three times that of stated by the NCRP report No.147 for ahalf value of the patients.The required thicknesses of Gypsum and Wood were about 4 mmand 20 mm respectively, whereas the actual thicknesses are higher than these values,furthermore ,another conventional materials were used as secondary barriers ,such as bricksand concrete, hence the secondary barriers thicknesses exist in the room are more thanadequate.

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