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A Study of Changes in the Primary Dose Penetrating the Protective Apron on SID in X-ray Radiography

X선촬영에서 보호앞치마를 투과한 1차 선량의 SID별 변화

  • Choi, Seong-Kwan (Department of Radiological Technology, Kwangju Health University)
  • 최성관 (광주보건대학교 방사선과)
  • Received : 2016.10.05
  • Accepted : 2016.12.02
  • Published : 2016.12.31

Abstract

This study is to figure out the amount of primary X-ray generated in SID 50cm, 1m, and 2m penetrating protective aprons in X-ray radiography for hands, skull, and lumbar spine. Results are as follows: Firstly, the exposure dose of primary X-ray which is low such as that of hand X-ray may be reduced by 270 times if protective aprons are worn, but it still slightly penetrates 0.3mm thick Pb protective aprons at SID 50cm, 1m, and 2m. Secondly, the exposure dose of primary X-ray which is moderate such as that of skull X-ray may be reduced by 22 times if protective aprons are worn, but it still fairly penetrates 0.3mm thick Pb protective aprons at SID 50cm, 1m, and 2m. Thirdly, the exposure dose of primary X-ray which is very high such as that of lumbar spine X-ray may be reduced by 13 times if protective aprons are worn, but it still penetrates a lot 0.3mm thick Pb protective aprons at SID 50cm, 1m, and 2m. Therefore, people in X-ray room should not only wear protective aprons at any spaces that the primary X-ray can reach, but also need to stand behind the thick Pb shield to protect the body if it is inevitable to stay in the room.

본 연구는 손, 머리, 허리측방향 등에 대한 X선 촬영조건(kVp, mAs)으로 SID 50cm, 1m, 2m에서 발생되는 1차 X선이 보호앞치마를 어느 정도 투과하는지를 알아보았고, 그 결과는 다음과 같다. 첫째, 손 X선 촬영조건의 1차X선은 0.3mmPb 보호앞치마로 차폐할 경우 선량을 약 270배 줄일 수 있으나 SID 50cm, 1m, 2m에서 보호앞치마를 각각 0.120, 0.043, 0.012mR 수준으로 투과한다. 둘째, 머리 X선 촬영조건의 1차X선은 0.3mmPb 보호앞치마로 차폐할 경우 선량을 약 22배 줄일 수 있으나 SID 50cm, 1m, 2m에서 보호앞치마를 각각 13.191, 4.821, 1.388mR 수준으로 투과한다. 셋째, 허리측방향 X선 촬영조건의 1차X선은 0.3mmPb 보호앞치마로 차폐할 경우 선량을 약 13배 줄일 수 있으나 SID 50cm, 1m, 2m에서 보호앞치마를 각각 77.844, 27.406, 8.606mR 수준으로 투과한다. 따라서 X선 검사 시 촬영실 내에 있는 관계자들은 1차X선이 도달하는 모든 공간에서 보호앞치마만을 착용한 채 머물러 있어서는 안 되며, 부득이하게 촬영실 안에 머물러 있어야 할 경우 보호앞치마 착용과 함께 두꺼운 납이 내장된 차폐칸막이 뒤에 안전하게 피해야 한다.

Keywords

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