Japanese Journal of Radiological Technology
Online ISSN : 1881-4883
Print ISSN : 0369-4305
ISSN-L : 0369-4305
Volume 31 , Issue 3
Showing 1-24 articles out of 24 articles from the selected issue
  • Type: Cover
    1975 Volume 31 Issue 3 Pages Cover7-
    Published: September 01, 1975
    Released: June 25, 2017
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  • Type: Cover
    1975 Volume 31 Issue 3 Pages Cover8-
    Published: September 01, 1975
    Released: June 25, 2017
    JOURNALS FREE ACCESS
    Download PDF (793K)
  • Type: Appendix
    1975 Volume 31 Issue 3 Pages App2-
    Published: September 01, 1975
    Released: June 25, 2017
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  • KAZUO KURAMITSU, KAZUYA YAMASHITA
    Type: Article
    1975 Volume 31 Issue 3 Pages 215-220
    Published: September 01, 1975
    Released: June 25, 2017
    JOURNALS FREE ACCESS
    Up to date, Groedel technic is used as one method to eliminate the scattered rays together with Grid technic. But the Groedel technic is regarded as less effective than the Grid technic because of it complexity, enlargement of image and coarse image quality. Recentry, exposure reduction is discussed to the whole radiography regions and making certain results. Here, we report our trial on chest radiography with Groedel technic. By making best use of Groedel technic nature, we succeeded in reducing exposure to 1/3 and gaining better image quality. To compare our new method with conventional Grid technic, we tested enlargement of image penumbra and image quality on MTF. We add that chest radiography with Groedel technic is clinically making pretty good results.
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  • EISHIYU SHINKAI
    Type: Article
    1975 Volume 31 Issue 3 Pages 221-230
    Published: September 01, 1975
    Released: June 25, 2017
    JOURNALS FREE ACCESS
    In recent years, angiographic examinations have been to be indispensable to medical examinations, and the cases of these examinations are increasing every year. We made investigations with a view to following items in abdominal angiographic examinations. 1) Radiographic positioning. 2) Exposure factors. (Tube voltage. Tube current. Exposure time. Grid. Film.) 3) Angiographic table. 4) Exposure field. Compensating filter. 5) Off focus X-rays. 6) The amount of radiation to the patient.
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  • TAKENORI KANNO, HISAO SATO, SHUNSUKE ABE, SACHIO SUYAMA
    Type: Article
    1975 Volume 31 Issue 3 Pages 231-235
    Published: September 01, 1975
    Released: June 25, 2017
    JOURNALS FREE ACCESS
    The amount of high energy electron beams is instable owing to lots of factors. As a matter of course, we should be careful in controling the amount of beams and it is also necessary to improve the beam monitoring apparatuses to make them stable. We have improved a usual monitor and had experiments with it. Here is the report. (1) An ordinary monitor is influenced by humidity, air atmoshere induced noise from an apparatus and so on. We made a new monitor with due regard to these factors. When the count is set to 100 with a usual monitor, the standard dose meter (ionex) indicate is 280R in 16 MeV and the lowest one is 198R. Between standard dose meter (ionex) and usual monitor is 82R. With the trial monitor, the highest integrated dose is 103R and the lowest one is 89R. The difference is only 14R and we are satisfied with the result. We gaine this value after 16 months'trial. (2) The chamber is made air tight and has a double structure with a collection electrode sandwiched between high tension charging electrodes. In this way, we can eliminate the influences of humidity and induced noise from an apparatus itself and we can putup ion collection efficiency without wide the the distance between the electrodes. As for the indicator circuit, we can get an input signal with a big s/n ratio and so we need not use high impedance resistors in the input circuitry. There is little affect from humidity and induced noise, and the circuit is stable. The indicator circuit has a complete electronic system, therefore counting speed is greatly improved and we can measure a large amount of beams in a short time. The trial monitor has four measuring ranges and so measuring is easily done. Our monitor has a circuit tester, too, and we can test the measuring circuit on occasion.
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  • KAZUMASA MITA, NOBUO KAMEYAMA, SADAO ISHIKAWA
    Type: Article
    1975 Volume 31 Issue 3 Pages 236-240
    Published: September 01, 1975
    Released: June 25, 2017
    JOURNALS FREE ACCESS
    Arthrography of the knee joint has been steadily improved since Andren and Wehrin reported "double contrast-horizontal beem method" in 1960. But its object is only to observe medial and lateral meniscus. In this paper, we report our new method to reveal all components of the knee joint such as menisci, articular cartilage, synovial membrane and ligaments. By this method, arthrography of the knee joint is applied to not only menicus injury but also rheumatoid arthritis, osteoarthritis and other disorders of the knee joint.
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  • TAKESHI SAWADA, KYOJI KAWAI, SYOICHI SUZUKI, SHIGEHISA FUJII, NOBUYUKI ...
    Type: Article
    1975 Volume 31 Issue 3 Pages 241-246
    Published: September 01, 1975
    Released: June 25, 2017
    JOURNALS FREE ACCESS
    According to the standard tomographic method a film in the cassette holder is held in horizontal plane so that the object plane is parallel to it. This method is not enough suitable for visualizing the vertebral column and the sternum with physiological bowing. A new tomographic method has been devised, therefore, by holding the films in the inclined planes to be suitable for the objects such as the optic foramen and the sternum. A comparison was made between the image quality of the standard tomography and the new method by measuring modulation transfer function (MTF). No significant difference was found between the modulation transfer function of the two methods in the linear, circucular and hypocyclodial orbits. We have devised a new type of the screens for the simultaneous multisection, holding five screens in the planes inclined at varying angles to the maximum of 24 degrees. The suitable kilovoltage was 80 in this procedure.
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  • SENICHI TAKEYOSHI
    Type: Article
    1975 Volume 31 Issue 3 Pages 247-286
    Published: September 01, 1975
    Released: June 25, 2017
    JOURNALS FREE ACCESS
    The X-ray chest radiography is most frequent used in all X-ray radiography, however, it happened many times that problems are raised at a case of diagnosis for the season of becoming degraded into habit from the monotonous of the work. This report contained the present condition of chest radiography in our land, its problems and opinions, furthermore practical geometrical subjects, emulsion, granular quality, contrast media, scatter radiation, the system of exposing value controlled. Thus, there have been so many problems on chest radiography and also it is recognized that gap is found between the theory and practice, particularly the problems of : wave form on secondary switched 3 phase 12 pulse system, of photo timer, of divided measurement method of light value on the exposing value controlled system and of saving the exposing value with quality of radigraphy depended on each type of equipment, then its explication of these problems and study by the comparative method. Especially for saving the exposing value, the problems happened between less exposing value and quality of radiography are against each other, so actually considering the exposed value, the diagnosis should be given prority, particularly on chest radiography it should be planned to make further progress of technology and quality of radiography.
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  • Type: Appendix
    1975 Volume 31 Issue 3 Pages 287-288
    Published: September 01, 1975
    Released: June 25, 2017
    JOURNALS FREE ACCESS
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  • [in Japanese], [in Japanese], [in Japanese], [in Japanese], [in Japane ...
    Type: Article
    1975 Volume 31 Issue 3 Pages 289-
    Published: September 01, 1975
    Released: June 25, 2017
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  • [in Japanese]
    Type: Article
    1975 Volume 31 Issue 3 Pages 289-290
    Published: September 01, 1975
    Released: June 25, 2017
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  • [in Japanese], [in Japanese], [in Japanese], [in Japanese]
    Type: Article
    1975 Volume 31 Issue 3 Pages 290-
    Published: September 01, 1975
    Released: June 25, 2017
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  • [in Japanese], [in Japanese], [in Japanese]
    Type: Article
    1975 Volume 31 Issue 3 Pages 290-291
    Published: September 01, 1975
    Released: June 25, 2017
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  • [in Japanese]
    Type: Article
    1975 Volume 31 Issue 3 Pages 291-
    Published: September 01, 1975
    Released: June 25, 2017
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    Download PDF (206K)
  • [in Japanese]
    Type: Article
    1975 Volume 31 Issue 3 Pages 291-292
    Published: September 01, 1975
    Released: June 25, 2017
    JOURNALS FREE ACCESS
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  • [in Japanese]
    Type: Article
    1975 Volume 31 Issue 3 Pages 292-
    Published: September 01, 1975
    Released: June 25, 2017
    JOURNALS FREE ACCESS
    Download PDF (222K)
  • [in Japanese]
    Type: Article
    1975 Volume 31 Issue 3 Pages 292-
    Published: September 01, 1975
    Released: June 25, 2017
    JOURNALS FREE ACCESS
    Download PDF (222K)
  • [in Japanese], [in Japanese], [in Japanese], [in Japanese], [in Japane ...
    Type: Article
    1975 Volume 31 Issue 3 Pages 292-293
    Published: September 01, 1975
    Released: June 25, 2017
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  • [in Japanese]
    Type: Article
    1975 Volume 31 Issue 3 Pages 293-
    Published: September 01, 1975
    Released: June 25, 2017
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    Download PDF (221K)
  • [in Japanese], [in Japanese], [in Japanese]
    Type: Article
    1975 Volume 31 Issue 3 Pages 293-
    Published: September 01, 1975
    Released: June 25, 2017
    JOURNALS FREE ACCESS
    Download PDF (221K)
  • Type: Appendix
    1975 Volume 31 Issue 3 Pages 294-297
    Published: September 01, 1975
    Released: June 25, 2017
    JOURNALS FREE ACCESS
    Download PDF (434K)
  • Type: Appendix
    1975 Volume 31 Issue 3 Pages 298-
    Published: September 01, 1975
    Released: June 25, 2017
    JOURNALS FREE ACCESS
    Download PDF (90K)
  • Type: Cover
    1975 Volume 31 Issue 3 Pages Cover9-
    Published: September 01, 1975
    Released: June 25, 2017
    JOURNALS FREE ACCESS
    Download PDF (629K)
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