폐 조직 등가물질을 이용한 감약정도 측정에 관한 고찰 = A Study on Measuring the Attenuation by Using the Equivalent Quality of the Lung Tissue

다국어 초록 (Multilingual Abstract)

It is important to measure the radiation dose of the heterogenous tissue in the radiogenic diagnosis and treatment. There are different absorption coefficient in oft and fatty tissue, bone, and tissue including water. They have the difference of the radiation in X-ray. We check the attenuation by changing the thickness and using the equivalent quality in the tissue. we used the acrylic, millet, and cork that have similar density to soft tissue, fatty, lung tissue for the attenuation of the each tissue. The results showed that acrylic measured 16 cm, 18 cm, and cork 47 cm. That is to say, the volume of the penetrating radiation was larger in following order, Cork, Millet, and then Acrylic. when we apply the real thickness of the soft, fatty, and lung tissue to the equivalent quality, the attenuation were 37% per 1 cm in the Acrylic, 34% in the Millet, and 63% in the Cork. We compared the atteunation between phantom made from equivalent quality and human chest. The attenuation in the chest PA was 9.33 mAs, and in the phantom was 9.43 mAs. Therefore, We can confirm the utility of the phantom to measure the dose of the penetrating radiation for the small difference about 0.1 mAs between phantom and human tissue.