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Article type: Cover
1965 Volume 20 Issue 4 Pages
Cover10-
Published: April 25, 1965
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Article type: Cover
1965 Volume 20 Issue 4 Pages
Cover11-
Published: April 25, 1965
Released on J-STAGE: June 24, 2017
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[in Japanese]
Article type: Article
1965 Volume 20 Issue 4 Pages
243-290
Published: April 25, 1965
Released on J-STAGE: June 24, 2017
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JITSUHO HANAMOTO, TAKEO KAJIYAMA
Article type: Article
1965 Volume 20 Issue 4 Pages
291-293
Published: April 25, 1965
Released on J-STAGE: June 24, 2017
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The photographing of occluding surface needs that of superior maxilla and palate. It goes without saying the photographing of occluding surface is very important for diagnosis. In spite of this importance, any kasette used for the photographing of occluding surface has not been in use yet. Therefore, the treatment of film in dark-room is inconvenient and the photographing often gives much uncomfor-tableness to patients. But today only little attention is paid to this kasette in the area of dental surgery. This problem is noticed here. and a dark slide is designed, made and put to practical use.
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FUYUKO KURIHARA, K. MATSUBARA, TOSHIO ANDO
Article type: Article
1965 Volume 20 Issue 4 Pages
294-299
Published: April 25, 1965
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This paper deals with the γ ray intensity distributions on the plane normal to the central ray by the one type Telecobalt apparatus (Type RI 103,300C, 2cm^2φ, wafers type). Method : The γ ray dose was calculated by means of film method, corrected by Siemens-dosemeter. One of the 2 sheets of industrial film type RR was placed holizontally on the surface of the water phantom (20×30×20cm^3), and the other one in the 10cm depth. Results : 1) It seems the intensity distributions are nearly homogeneous within 5×5cm^2 diaphram width. It is observed that relative intensity of the peripheral area to the central area at the region of the umbra are more than 90%. In the penumbra area diminished the intensity to 80〜50%. But the shape of irradiation fields are seemed almost rectangular, similarly to th shape of diaphram. 2) If the diaphragm width are more than 6×6cm^2,the diminishments of intensity at the corners of the irradiation fields are observed (from 80% to 60% of center intensity). This matter is same in the umbral area as the penumbral area. According to this facts, the shape of irradiation fields are jnst like round, in spite of rectangular diaphragm. 3) It is caused by the shape and geometrical structure of the cylindrical hole of the rotating shutter that the isodose curves are not rectangular at large irradiation fields. 4) To perform the shape of irradiation fields rectangular similar to the diaphrgm pattern are there some improvements necessary. (1) To widen the diameter of cylindrical hole of the rotating shutter. (2) To make alternation of shape of the cylindlical hole to the rectangle. (3) To the shorten the length of the hole of the rotating shutter.
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YOSHIMUNE TANAKA
Article type: Article
1965 Volume 20 Issue 4 Pages
300-307
Published: April 25, 1965
Released on J-STAGE: June 24, 2017
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An X-ray xuality and quantity calibration among more than two X-ray apparatus is indispensable for accomplishment to the standardization of radiographic exposure technic. In order to obtain the same X-ray out put auther recommend following method. On the basis of a kV-chart the standard transmission characteristic of X-ray at a certain X-ray tube current as 100mA is created. After measuring an X-ray transmission curve of the apparatus to be calibrated the same condition these two curves are superimposed and determined how they are differed each other. Error of subject tube voltage is estimated from the deviation on the curve.
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KIYOHIKO TAMURA
Article type: Article
1965 Volume 20 Issue 4 Pages
308-317
Published: April 25, 1965
Released on J-STAGE: June 24, 2017
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In order to diagnose on the form of the human body, R. I. scanning is used. The image of scintigram obtained by scanning must be drawn under a certain condition. The image of scintigram must not be read only by the from and contrast of it. Also the exactness of the image and the ability to draw the inner details (the largeness of image enough to apear in form as an image or distinction from vacination etc., ) must be examined and standarized. A basic condition for this purpose was experimentally examined here by using a model.
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Article type: Appendix
1965 Volume 20 Issue 4 Pages
318-319
Published: April 25, 1965
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[in Japanese], [in Japanese], [in Japanese], [in Japanese]
Article type: Article
1965 Volume 20 Issue 4 Pages
320-322
Published: April 25, 1965
Released on J-STAGE: June 24, 2017
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[in Japanese]
Article type: Article
1965 Volume 20 Issue 4 Pages
322-
Published: April 25, 1965
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[in Japanese], [in Japanese]
Article type: Article
1965 Volume 20 Issue 4 Pages
322-324
Published: April 25, 1965
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[in Japanese]
Article type: Article
1965 Volume 20 Issue 4 Pages
324-
Published: April 25, 1965
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[in Japanese]
Article type: Article
1965 Volume 20 Issue 4 Pages
324-
Published: April 25, 1965
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[in Japanese]
Article type: Article
1965 Volume 20 Issue 4 Pages
324-325
Published: April 25, 1965
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[in Japanese], [in Japanese]
Article type: Article
1965 Volume 20 Issue 4 Pages
326-327
Published: April 25, 1965
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[in Japanese]
Article type: Article
1965 Volume 20 Issue 4 Pages
327-330
Published: April 25, 1965
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[in Japanese]
Article type: Article
1965 Volume 20 Issue 4 Pages
330-331
Published: April 25, 1965
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[in Japanese]
Article type: Article
1965 Volume 20 Issue 4 Pages
331-332
Published: April 25, 1965
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[in Japanese]
Article type: Article
1965 Volume 20 Issue 4 Pages
332-
Published: April 25, 1965
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[in Japanese]
Article type: Article
1965 Volume 20 Issue 4 Pages
332-333
Published: April 25, 1965
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[in Japanese]
Article type: Article
1965 Volume 20 Issue 4 Pages
333-
Published: April 25, 1965
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[in Japanese], [in Japanese]
Article type: Article
1965 Volume 20 Issue 4 Pages
333-
Published: April 25, 1965
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[in Japanese], [in Japanese], [in Japanese], [in Japanese]
Article type: Article
1965 Volume 20 Issue 4 Pages
333-334
Published: April 25, 1965
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[in Japanese]
Article type: Article
1965 Volume 20 Issue 4 Pages
334-
Published: April 25, 1965
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[in Japanese]
Article type: Article
1965 Volume 20 Issue 4 Pages
334-337
Published: April 25, 1965
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Article type: Appendix
1965 Volume 20 Issue 4 Pages
App3-
Published: April 25, 1965
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Article type: Cover
1965 Volume 20 Issue 4 Pages
Cover12-
Published: April 25, 1965
Released on J-STAGE: June 24, 2017
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