後方散亂線이 放射線寫真 濃度에 미치는 影響 = Influence on Radiographic Density by the Back Scatter

다국어 초록 (Multilingual Abstract)

The successfull image of any radiography must not influence on the film by radiation scatter. In case of reached the film to scatter will be reduced film contrast and sharpness.
For find out the differential dentisty of flim by the scatter is experimented suca as : the lead foil of various thickness is contacted behind the film cassette, used to non-screen and itensifying screen, varience of radiation field size.

The results can be summarized as following;

1. The difference of radiographic density is increased with X-ray tube voltage up, larger the radiation field size and larger the intensifying factor.

2. In case of positioned shield material behind film cassette, difference of film density is changed some and it was more increase when is used fluorescent intensifying screen.

3. When is larger the differential film density by the back scatter shall be increased thickness of shield behind back scatter.

목차 (Table of Contents)

• 1. 序 論
• 2. 實驗材料 및 方法
• 3. 實驗 結果 및 考察
• 4. 結論