Japanese Journal of Radiological Technology
Online ISSN : 1881-4883
Print ISSN : 0369-4305
ISSN-L : 0369-4305
Volume 17 , Issue 3
Showing 1-11 articles out of 11 articles from the selected issue
  • Type: Cover
    1961 Volume 17 Issue 3 Pages Cover7-
    Published: December 25, 1961
    Released: June 24, 2017
    JOURNALS FREE ACCESS
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  • Type: Cover
    1961 Volume 17 Issue 3 Pages Cover8-
    Published: December 25, 1961
    Released: June 24, 2017
    JOURNALS FREE ACCESS
    Download PDF (662K)
  • Type: Appendix
    1961 Volume 17 Issue 3 Pages App3-
    Published: December 25, 1961
    Released: June 24, 2017
    JOURNALS FREE ACCESS
    Download PDF (127K)
  • SHIYUJI HAYASHI
    Type: Article
    1961 Volume 17 Issue 3 Pages 98-138
    Published: December 25, 1961
    Released: June 24, 2017
    JOURNALS FREE ACCESS
    The limitation in manifesting X-ray gram is influenced by an apparatus, X-ray tube, fittings and sensitizer, all of which have been improved. According to these improvements, the limitations in manifesting X-ray gram has been reduced. Therefore the author tried to find the limitations, using usual apparatus, fittings and sensitizer. In general, contrast, sharpness and density are the important factors in manifesting X-ray gram. Regarding contrast at the detailed manifesting, that is, contrast in detail, in order to study the delicate diference of density and the manifestation of a very small object, the author examined the position of the object (M.P.D.) surrounded by other substances which are a cause of scattering X-ray, the size of the object and the degree of X-ray absorption and the following points were concluded. 1) The more the X-ray absorption is, and the bigger the object is, the larger the M.P.D. becomes to reduce the relative contrast. In those experiments each limits were found in every change of doses of abosrbed X-ray, the size of object and M.P.D. 2) When the scattering X-ray was eliminated, the more the X-ray absorption is, and the bigger the object is, the relative contrast was increased. The phenomena was caused by the fact that X-ray quantity and condition of scattering X-ray are influenced by the object and surrounding substances. The same phenomena were found in radiography with opaque medium in which the X-ray absorption is more than in the usual rediography. The method for manifesting the part whose density is low as mentioned above was studied in theory. Standing on the results obtained from the theoritical study, the author made fundamental experiments, using a phantom in angiography, ventriculography, cholecystography, cystography and nephrography, all of which are hard to show a clear contrast, or whose objects are very small and slender. These fundamental experiments were applied in clinic. Taking up the object like beam-borne and crack in borne, the unsharpness caused by form of object and sensitizer was studied and unsharpness caused by momement of object was studied in angiocrardiography. The degree of unsharpness controlled by the size of focus and M.P.D., tube voltage, scattering X-ray, the exposure time-all of which have influence on sharpness-were exaimned and each limits in every change was tested out. In order to interpretate the detailed X-ray gram, a scientific and objective way of observing was abovocated here, considering the light quantitty, reflected light from the outside and psychlogical influence.
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  • [in Japanese]
    Type: Article
    1961 Volume 17 Issue 3 Pages 138a-142
    Published: December 25, 1961
    Released: June 24, 2017
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  • Taihei Kusakai
    Type: Article
    1961 Volume 17 Issue 3 Pages 143-158
    Published: December 25, 1961
    Released: June 24, 2017
    JOURNALS FREE ACCESS
    The first report on tomography was followed by the second, in which the scattering X-ray was from the several points of view. In order to find the rate of scattering X-ray doses contained, a method for computaing the degree of density only in direct X-ray was devised. The values of the tube voltage, extent of the field and angle of rotation were found experimently.
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  • YOSHIRO IIZUKA
    Type: Article
    1961 Volume 17 Issue 3 Pages 159-162
    Published: December 25, 1961
    Released: June 24, 2017
    JOURNALS FREE ACCESS
    The special character of X-ray film, that is, the relation between the development time and progress of developing were studied. Home manifactured film P.X. and famous imported ones were used in this comperative study. The following results were obtained. 1) The progress of developing of film P.X. is faster than that of usual ones. Therefore, in making film, it is suggested evidently to be intended to reduce the development time, time of the treatments in a dark room. 2) Such a film as fast in developing should be used with proper X-ray doses for purpose of reducing the development time. 3) The developing at 20℃ for 3-4 munutes was tested out to be the most proper for the film P.X. In any case, deveroping at 20℃ should not be continued for more than 5 minutes.
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  • YOSHICHIKA NAITO, HIROSHI MATSUURA, KENSUKE ITO
    Type: Article
    1961 Volume 17 Issue 3 Pages 163-166
    Published: December 25, 1961
    Released: June 24, 2017
    JOURNALS FREE ACCESS
    To take a radiography of optic canal, sellar or lateral skull, the occipito-frontal roentgenography was used. The focus of the tube being pointed at right angle to the center of a film, the both points of incidence and emission were marked. Then the line between the two points mentioned above was put just on the perpendicular line from the tube focus to the center of film. The method and needful apparatus were reported here.
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  • Type: Appendix
    1961 Volume 17 Issue 3 Pages 167-
    Published: December 25, 1961
    Released: June 24, 2017
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  • Type: Appendix
    1961 Volume 17 Issue 3 Pages 168-169
    Published: December 25, 1961
    Released: June 24, 2017
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  • Type: Cover
    1961 Volume 17 Issue 3 Pages Cover9-
    Published: December 25, 1961
    Released: June 24, 2017
    JOURNALS FREE ACCESS
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