투시 조영 촬영시 사용되는 방호복의 차폐효율 증가와 경량화는 오랜 시간 연구 대상이 되었다. 이러한 방호복의 질적 향상을 위하여 연구한 결과는 다음과 같다. Apron의 규격인 납당량 0.25 mm에 해당하는 투과선량률은 5.2%로 나타났으며, 시료 Sn, Ni, Ti, Cu의 방사선 차폐 효율은 Sn이 가장 놓게 나타났다. 증착시료 Sn + Pb와 Pb + Sn는 각각 Sn 0.18 mm와 Pb 0.1 mm, Pb 0.1 mm와 Sn 0.36 mm에서 apron의 규격인 납 0.25 mm 두께로 나타났다. 증착시료 Sn+Pb는 Apron의 규격인 0.25 mm 두께보다 차폐효율이 높고, 면적당 무게가 가벼워 방호복 물질로 적합한 적으로 사료된다.
In this work, we characterized the shieldability and lightweight of radiation protective aprons which were consisted of various metal(Pb, Sn, Ni, Ti and Cu) by measuring the x-ray dose transmitted through the filters. The transmitted ratio and lead equivalent of various metal were obtained by linear interpolation and the lead equivalent of double layered filters contained Pb layer was determined. The transmitted ratio of the apron(0.25 mmPb) specified in KS B 0845 was 5.2%. The transmitted ratio of the filters at the thickness of 0.6 mm was decreased in the other of Ni(32.60%), Ti(17.75%), Cu(13.25%) and Sn(3.84%). From the results of experimental evaluation for combined filter of Pb and Sn, it was founded that in the case of the first Sn layer, the lead equivalent was higher than that of the first Pb layer. The lead equivalent corresponding to apron of 0.25 mmPb was obtained in the double layered filters of Sn(0.19 mm) - Pb(0.1 mm) and Pb(0.1 mm) - Sn(0.37 mm). Thus, the Sn-Pb filter had the lower weight about 13% than apron of 0.25 mmPb.
