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Article type: Cover
1966 Volume 21 Issue 4 Pages
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Published: May 25, 1966
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Article type: Cover
1966 Volume 21 Issue 4 Pages
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Published: May 25, 1966
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MASARU HANADA, TAIZO SUMIHIRO
Article type: Article
1966 Volume 21 Issue 4 Pages
329-333
Published: May 25, 1966
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A new type of condenser, silicon cockcroft condenser which has cockcroft-Walton circuit was originated by the authors. In order to make out the cockcroft-Walton circuit, the following materials were used. 1) A small-sized high voltage silicone rectifier with a series circuit to a silicon rectifiier, in which surface passivation was applied. 2) a lot of condenser data. Then this silicon-cockcroft condenser was applied to a x-ray apparatus. The results were reported here.
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SADAO SATO, NOBORU HATORI
Article type: Article
1966 Volume 21 Issue 4 Pages
334-338
Published: May 25, 1966
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Roentgenography of the chest is generally performed by the use of the coefficient of the chest thickness. However, the roentgenograph of a defiinite density can cometimes be not obtained when the chest thickness measured at only one point is referred to, because there is individual difference of absorption. Some reports have been made on this problem. In our roentgenography, we compute the chest thickness from measurements at two points, and furthermore we sometimes correct this by measurements at three points. By this means we have obtained satisfactory results.
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MASAMITI MATUDAIRA
Article type: Article
1966 Volume 21 Issue 4 Pages
339-342
Published: May 25, 1966
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For calculating the percentage depth dose under any circumstances in telecobalt therapy, factors influencing the percentage depth dose especially additional scatter dose were studied experimentally and theoretically. The percentage depth dose could be expressed as the following equations. In general : P_a=(D/(D+x))^2・e^<-0.0634x>・S_x・100(%) =(D/(D+x))^2・e^<-0.0634x>・(A_xlog_<10>F_x+B_x)・100(%) If x≦10cm : P_a=(D/(D+x))^2・e^<-0.0634x>・{(0.016x+0.018)log_<10>F_x+√<55369.38-(x-6)^2>-234.22}・100(%) If x≧10cm : P_a=(D/(D+x))^2・e^<-0.0634x>・{(0.022-0.042)log_<10>F_x-0.025x+1.308}・100(%) P_a : Persentage depth dose D : ^<60>Co source-skin distance(cm) x : Depth(cm) S_x : Scatter factor F_x : Irradiated field(cm^2) A_x, B_x : Function of depth Above-described equations are available provided that source-skin distance is from 30 to 110cm, field size 4 to 600cm^2 and depth 0.5 to 25cm. But in case of field size less than 16cm^2, the depth more than 10cm should be taken to calculate as 10cm. Above equations were introduced into the special designed sliding rule and percentage depth dose was successfully obtained by maneuver of scales and casoles.
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KIYOTAKA TASHIMA, SUEO TOMITA, KAZUYOSHI TSUTIDA
Article type: Article
1966 Volume 21 Issue 4 Pages
343-346
Published: May 25, 1966
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As for the cervical vetebra radiography, frontal and lateral roentgenographies, or the first and second oblique roentgenographies have been applies. Many research workers at home and abroad have various methods on the oblique roentgenography to observe the foramen intervertebrale. However, each of these methods has its merits and demerits. The authors examined these methods and obtained good results, which were reported here.
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[in Japanese], [in Japanese]
Article type: Article
1966 Volume 21 Issue 4 Pages
347-358
Published: May 25, 1966
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Article type: Appendix
1966 Volume 21 Issue 4 Pages
359-360
Published: May 25, 1966
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[in Japanese]
Article type: Article
1966 Volume 21 Issue 4 Pages
361-363
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Article type: Article
1966 Volume 21 Issue 4 Pages
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[in Japanese], [in Japanese], [in Japanese], [in Japanese], [in Japane ...
Article type: Article
1966 Volume 21 Issue 4 Pages
363-366
Published: May 25, 1966
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Article type: Article
1966 Volume 21 Issue 4 Pages
366-367
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Article type: Article
1966 Volume 21 Issue 4 Pages
367-
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Article type: Article
1966 Volume 21 Issue 4 Pages
367-368
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Article type: Article
1966 Volume 21 Issue 4 Pages
368-
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Article type: Article
1966 Volume 21 Issue 4 Pages
368-369
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Article type: Article
1966 Volume 21 Issue 4 Pages
369-
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Article type: Article
1966 Volume 21 Issue 4 Pages
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1966 Volume 21 Issue 4 Pages
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Article type: Article
1966 Volume 21 Issue 4 Pages
369-370
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1966 Volume 21 Issue 4 Pages
370-
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1966 Volume 21 Issue 4 Pages
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Article type: Article
1966 Volume 21 Issue 4 Pages
370-371
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1966 Volume 21 Issue 4 Pages
371-372
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Article type: Article
1966 Volume 21 Issue 4 Pages
372-
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Article type: Article
1966 Volume 21 Issue 4 Pages
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Article type: Article
1966 Volume 21 Issue 4 Pages
372-
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Article type: Article
1966 Volume 21 Issue 4 Pages
372-373
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Article type: Article
1966 Volume 21 Issue 4 Pages
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Article type: Article
1966 Volume 21 Issue 4 Pages
373-375
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1966 Volume 21 Issue 4 Pages
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Article type: Article
1966 Volume 21 Issue 4 Pages
375-376
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Article type: Article
1966 Volume 21 Issue 4 Pages
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Article type: Article
1966 Volume 21 Issue 4 Pages
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1966 Volume 21 Issue 4 Pages
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Article type: Article
1966 Volume 21 Issue 4 Pages
376-377
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1966 Volume 21 Issue 4 Pages
377-
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Article type: Article
1966 Volume 21 Issue 4 Pages
377-
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Article type: Article
1966 Volume 21 Issue 4 Pages
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Article type: Article
1966 Volume 21 Issue 4 Pages
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Article type: Article
1966 Volume 21 Issue 4 Pages
378-
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Article type: Article
1966 Volume 21 Issue 4 Pages
378-
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Article type: Article
1966 Volume 21 Issue 4 Pages
378-
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Article type: Article
1966 Volume 21 Issue 4 Pages
378-379
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Article type: Article
1966 Volume 21 Issue 4 Pages
379-
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Article type: Article
1966 Volume 21 Issue 4 Pages
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Article type: Article
1966 Volume 21 Issue 4 Pages
379-
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Article type: Article
1966 Volume 21 Issue 4 Pages
379-
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Article type: Article
1966 Volume 21 Issue 4 Pages
379-
Published: May 25, 1966
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[in Japanese], [in Japanese]
Article type: Article
1966 Volume 21 Issue 4 Pages
379-
Published: May 25, 1966
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