自作の可変放射口に就いて
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概要
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When we take the radiograph, it is not only unnecessary but harmful to take the irradiation field too broad compared to the area of the object. Becouse, it incrases irradiation quantity to the patient and decreases the sharpness of the photograph. Then, as I have mede a trial manufacture of the cone which has variable solid angle, I have described below the feature of it.
- 1956-12-25