선원에서 X선 방어용 칸막이간 거리가 상이한 유방촬영실의 공간 산란선량 비교

Spatial Scattered Dose Comparison from X-ray Source to Defensive Divider Where the Distance is Different Exam Room

Purpose : Recently, there has been an increasing interest in average glandular dose(AGD) of breast in digital mammo-radiography and it has been reported. Otherwise, there is no study on exposure dose of operators. Thus, we suggest that it set a defensive divider at standard distance and its method to reduce exposure dose of operators. Materials and Methods : Equipment resignations senography DS(GE co.) and dosimeter is model 2026c survey meter (radical co.), ACR mammmo phantom, the thick control to use did with acryl plates. The test room especially the phantom thickness and Target/Filter, changed and is measured from three points of defensive divider the scattered dose who compared Results : 1. When fixing Target/Filter, 62mm phantom scattered dose was highly measured double degree. 2. Target/Filter at the time of Mo/Mo the scattered dose was most highly measured from the same thickness. 3. On the identical condition which is to be measured the scattered dose that Mio projection of 3 or more times are higher CC projection and, defensive divider internal point the scattered dose was measured. Conclusion : As the result, until defensive divider is possible above of 136cm does shortest distance from x-ray source. Moreover It is consider that To make an curve distance from X-ray tube to defensive divider is effective than to make a straigt line distance. And In this case, thick breast and plastic breast, it’s required to make an effort to reduce dose and dose which is change from target/filter.