Evaluation of international shielding recommendations and applications in selected diagnostic radiology departments in Sudan
Abstract
The present studyinvestigates the differences betwe en two recommendations (NCRP49& NCRP147) and their applications to calculate the shielding requirement for primary and secondary radiation barrier of an x-ray facility in four hospitals in Sudan. The studied facilities have different layout and dimension where the rooms have divergence from standard radiographic room dimensio n. The investigations were performed at the followi ng hospitals: 1) Khartoum hospital (Sudatel), 2) Khart oum hospital, 3) Khartoum Bahry hospital and 4) Al Qwaity specialist hospital. Measurement of unshielded scat ter and leakage radiation at selected point around the examination table and the scatter dose were carried out. The product of dose per unit of workload‐ x-r ay workload ‐ scatter fraction and field size as corrected for inverse square law were calculated. A comparison of scattered dose and workload distribution show that when workload dconcept is utilized to determine the do se due to scatter radiation, the unshielded scatter doses is lower than that generated by the NCRP 49 when the w orkload is performed at a single kv p. The research show that NCRP 147 reduce the thick ness of primary barriers e to 1) Khartoum hospital (Sudatel) 55% , 2) Khartoum hospi tal 56% , 3) Khartoum Bahry hospital 46% and 4) AlQ waity specialist hospital 48% than traditional method bas ed on report NCRP 49 when the workload is performed at a single kv p. Also leakage radiation was calculate and the rof the…
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