Japanese Journal of Radiological Technology
Online ISSN : 1881-4883
Print ISSN : 0369-4305
ISSN-L : 0369-4305
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Volume 30, Issue 3
Displaying 1-29 of 29 articles from this issue
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  • [title in Japanese]
    Article type: Cover
    1974 Volume 30 Issue 3 Pages Cover7-
    Published: September 30, 1974
    Released on J-STAGE: June 25, 2017
    DOIhttps://doi.org/10.6009/jjrt.KJ00003103898
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    Article type: Cover
    1974 Volume 30 Issue 3 Pages Cover8-
    Published: September 30, 1974
    Released on J-STAGE: June 25, 2017
    DOIhttps://doi.org/10.6009/jjrt.KJ00003103899
    JOURNAL FREE ACCESS
    Download PDF (662K)
  • [title in Japanese]
    Article type: Appendix
    1974 Volume 30 Issue 3 Pages App3-
    Published: September 30, 1974
    Released on J-STAGE: June 25, 2017
    DOIhttps://doi.org/10.6009/jjrt.KJ00003103900
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  • [title in Japanese]
    [in Japanese]
    Article type: Article
    1974 Volume 30 Issue 3 Pages 248-249
    Published: September 30, 1974
    Released on J-STAGE: June 25, 2017
    DOIhttps://doi.org/10.6009/jjrt.KJ00003103901
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  • [title in Japanese]
    [in Japanese]
    Article type: Article
    1974 Volume 30 Issue 3 Pages 249-
    Published: September 30, 1974
    Released on J-STAGE: June 25, 2017
    DOIhttps://doi.org/10.6009/jjrt.KJ00003103902
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    Article type: Article
    1974 Volume 30 Issue 3 Pages 250-251
    Published: September 30, 1974
    Released on J-STAGE: June 25, 2017
    DOIhttps://doi.org/10.6009/jjrt.KJ00003103903
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  • [title in Japanese]
    [in Japanese]
    Article type: Article
    1974 Volume 30 Issue 3 Pages 251-
    Published: September 30, 1974
    Released on J-STAGE: June 25, 2017
    DOIhttps://doi.org/10.6009/jjrt.KJ00003103904
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  • SPINAL CORD ANGIOGRAPHY
    NOBUYUKI NOGUCHI, MISAO KAKINUMA, AKIO KATANO
    Article type: Article
    1974 Volume 30 Issue 3 Pages 252-254
    Published: September 30, 1974
    Released on J-STAGE: June 25, 2017
    DOIhttps://doi.org/10.6009/jjrt.KJ00003103905
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    Spinal cord angiography is being used as a measure for cleagnosis of damage or dease of spenal cord, caeused by traffie accidents which are becoming more and more Violent on these days. Among other similar photographing means being practiced up to non, the image of the photogrophed blood vessel is the narronest one, and it is therefone most important how to tahe a chearer picture. As the picture of blood vessel is doubled by the shadow of the spinal cord itself and thus becomes loss clear, method of Subtraction is being considered. Since it is lengthy plrotographiing. The angiography must be given further studies ceeith regard to obstacles as well as other problems.
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  • X-RAY CHARACTERISTIC FROM DLAGNOSTIC X-RAY TUBE FOR APPLIED VOLTAGE AND CURRENT WAVEFORM : (II) BASIC RECTIFIER WAVEFORM
    TAKASHI SATO
    Article type: Article
    1974 Volume 30 Issue 3 Pages 255-265
    Published: September 30, 1974
    Released on J-STAGE: June 25, 2017
    DOIhttps://doi.org/10.6009/jjrt.KJ00003103906
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    The photon energy spectra, energy fluence, photon fluence, exposure and mean energy of the diagnostic x-ray tube for comparing 4 Kinds of basic rectifier waveform, is constant potential, 12 puls, 6puls and 2puls, have been computed by based Kramer's theory and Hettinger's experimental date modified for filtration and voltage waveform. Also, the quantam and energy conversion efficency from a electron to a x-ray photon in x-ray tube are computed for given various tube voltage and waveform. Form those results, it becomes clear that relation between characteristics of primary radiation and tube operating conditions. The exposure and transminssion of radiation in aluminum are good agreement with experimental values obtained under a variety of tube voltage.
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  • MODULATION TRANSFER FUNCTION OF CLEAN-UP EFFECT OF SCATTERED RADIATION BY COLLIMATOR
    HIROSHI INATSU
    Article type: Article
    1974 Volume 30 Issue 3 Pages 266-268
    Published: September 30, 1974
    Released on J-STAGE: June 25, 2017
    DOIhttps://doi.org/10.6009/jjrt.KJ00003103907
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    In the radiographic system, scattered radiations from object make the image quality poor. As clean-up equipment, X-ray grids and collimator are generally used. The efficiency of collimator had been geometrically evaluated concerning extra focal radiation and penumbra. As to the influence of acattered radiations on the image quality some more quantiativ evaluation is necessary. In this paper, we tried to show the clean-up effect of scattered radiations of collimator by means of the technique of Modulation Transfer Function (MTF). Let MTF of systems with coimllator and without collimator be X(ω) and Y(ω) respectively. The MTF C(ω) of clean-up effect of scatterted radiations by collimator is to be obtained by the following Equation. [numerical formula] Where C(ω) is changed by radiation fields. From the Theory above mentioned, we studiet about the MTFs of clean-up effect of scattered radiations on each radiation field of 10×10cm., 20×20cm. and 30×30cm., As a phantom, we used acrilic board of 9cm. thick, and the conditions of exposure are 80kVp. and 100mA.. The experimental results are shown in Figure 3. It is proper that the improvement of image in narrow radiation field is better than in wide one. If the clean-up effect of scattered radiations is evaluated by MTF, then the difference of result by mesurement method is solved, we can evaluate the clean-up effect quantitatively. This method is useful to be the selection of the optimum combination of X-ray grid and radiation field, and these results are useful to the selection of equipments according to radiographic portions. The effective selection of equipments is useful to the reduction of patient exposures and the improvement of capability of diagnosis.
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  • FACTORS INFLUENCING ON RETAKE RATE OF X-RAY EXAMINATION
    TSUYOSHI WATANABE, KANEMICHI SHIMOMURA
    Article type: Article
    1974 Volume 30 Issue 3 Pages 269-271
    Published: September 30, 1974
    Released on J-STAGE: June 25, 2017
    DOIhttps://doi.org/10.6009/jjrt.KJ00003103908
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    Factors influencing on a retake rate of X-ray examination were analysed in 13 big hospitals in Niigata Prefecture. In the one-year period, from November of 1972 to October of 1973,331,683 films were taken in these hospitals. Of these, 7,061 or 2.12% were retaken films. The retake rate in this survey tended to be lower in hospitals with a large number of beds, of daily x-ray films, and of full-time radiologists. This may indicate that the retake rate is influenced rather by human factors related to the activity of hospital itself than only technical factors.
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  • FUNDAMENTAL STADIES OF THE TUMOR SCANNING WITH 57Co-BLEOMYCIN
    SHUN-ICHI TANOUE, SEIKI MATUKANE, MIEKO KAJIFUSA
    Article type: Article
    1974 Volume 30 Issue 3 Pages 272-275
    Published: September 30, 1974
    Released on J-STAGE: June 25, 2017
    DOIhttps://doi.org/10.6009/jjrt.KJ00003103909
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    The authours studied positive deliniation of the tumor scanning with 57Go-Bleomycin. Five hundred micro curie of 57Co-Bleomycin was injected, and the opetimum scintigraphy was taken at between 18 hours and 20 hours in the breast cancer after injection with a gamma camera. The detected minimum tumor in patients using the 4,000 hole pararell collimator attached to the delsy line system scintillation camera was 1.5cm on the face of body. The faults of the tumor scanning with 57Co-Bleomycin are followings. The activity of 57Co-Bleomycin in the tumor is a little, so it should be used in high sensitivity detector, however 57Co has ideal energy γ rays for scanning.
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  • THE REDUTION FOR THE PATIENT DOSAGE IN X-RAY EXAMINATIONS : THE THEORETICAL CONSIDERATIONS OF THE IMAGE QUALITY
    SHIGEKI UYAMA
    Article type: Article
    1974 Volume 30 Issue 3 Pages 276-287
    Published: September 30, 1974
    Released on J-STAGE: June 25, 2017
    DOIhttps://doi.org/10.6009/jjrt.KJ00003103910
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    We studied about the method of the reduction for the patient dosage, keeping the image quality at present, their contents are as follows. 1) The relationship between the resolution of the system and the efficient exposure to the Intensifying screens. 2) From the Quality Ratio of the system, find the suitable and reasonable combination of each element of the radiographic system. 3) Discussing the every kind of screen-film combination and try to find the best radiographic mottle in their combinations. 4) The variation of the image quality at the case of changing the thickness of Al-Filter.
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  • REDUCTION OF PATIENT RADIATION DOSE FROM DIAGNOSTIC RADIOGRAPHY
    TADASHI SUNAYASHIKI
    Article type: Article
    1974 Volume 30 Issue 3 Pages 288-296
    Published: September 30, 1974
    Released on J-STAGE: June 25, 2017
    DOIhttps://doi.org/10.6009/jjrt.KJ00003103911
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    This report dealt with the technical factors to reduce the patient exposure from diagnostic x-ray examination. According to hospital survey, there were possibilities of dose reduction by the use of high kVp technique, limitation of field size and the improvement of recording systems including film and intensifying screen. The further dose reduction can be achieved by the introduction of x-ray TV as recording system. The careful attention should be given to foetal and children examinations which contribute significantly to gonad dose. It was suggested that the proper work load for radiolgical technician and daily care of x-ray unit and technique to ensure the best radiographic quality were necessary for minimum patient exposure.
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  • DOSE REDUCTION IN DIAGNOSTIC RADIOLOGY : QUALITY OF ROENTGENOGRAMS AND DOSE REDUCTION
    SHIZUO MARUYAMA
    Article type: Article
    1974 Volume 30 Issue 3 Pages 297-308
    Published: September 30, 1974
    Released on J-STAGE: June 25, 2017
    DOIhttps://doi.org/10.6009/jjrt.KJ00003103912
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    The use of x-ray equipment and radioactive substances carries with its responsibility to keep down unwanted radiation to the patient and minimize radiation to the gonads. In the approach to radiation reducing design, there are certain basic principles which should be borne in mind, include the following : intensifying screens of high speed, high speed films, hgh kilovoltage, adequate filtration and accurate collimation of the beam, longer target/film distance, and the use of the image intensifier in place of the fluoroscopic screen. The factors influencing the quality of roentgenograms were studied experimentall and discussed on the standpoint of view of dose reduction to the patient. The author presented Qr (dose reduction image quality), and discussed correlation Qc (conventional image quality) and Q (total image quality). The estimation of several minimized rediation dose roentgenograms was tried by physicians for clinical use in each organ.
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  • [title in Japanese]
    [in Japanese]
    Article type: Article
    1974 Volume 30 Issue 3 Pages 309-312
    Published: September 30, 1974
    Released on J-STAGE: June 25, 2017
    DOIhttps://doi.org/10.6009/jjrt.KJ00003103913
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  • (Suquel) THE QUANTITY OF RADIOACTIVE RAYS I RECEIVED FOR 43 YEARS, AND MY HYGIENIC CONDITION
    TOMIHIRO YOSHIDA
    Article type: Article
    1974 Volume 30 Issue 3 Pages 313-316
    Published: September 30, 1974
    Released on J-STAGE: June 25, 2017
    DOIhttps://doi.org/10.6009/jjrt.KJ00003103914
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    I made a report on radioactive rays and my experience three times in the past. First, "the Quantity of Scattered Radioactive Rays I Received for 25 years, and the method of Protection, " at the 12th Japanese Radiological Technology Society, April 1956. Secondly, "The Quantity of Radioactive Rays I Received for 35 years, and my Hygienic Condition, " at the 22nd Japanese Radiological Technology Society, April 1966 (See The Japanese Radiological Technology Society Bulletin, Vol.22 No.4). Thirdly, "The Quantity of Radioactive Rays I Received for 41 years and a Half, and My Hygienic Condition, " in The Japanese Radiological Technology Society Bulletin, Vol. 29,No.1. 1973. Now that I am gong to leave the field of radiology, I classify the cases of radiograph and radiotherapy, which I handed for 43 yera (from 1931 to 1973), into two groups, i.e. the ones with partial protection and the ones with perfect protection, and I report on the quantity of radioactive rays I received and mypresent hygienic condition.
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  • [title in Japanese]
    [in Japanese]
    Article type: Article
    1974 Volume 30 Issue 3 Pages 317-332
    Published: September 30, 1974
    Released on J-STAGE: June 25, 2017
    DOIhttps://doi.org/10.6009/jjrt.KJ00003103915
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  • [title in Japanese]
    [in Japanese]
    Article type: Article
    1974 Volume 30 Issue 3 Pages 333-
    Published: September 30, 1974
    Released on J-STAGE: June 25, 2017
    DOIhttps://doi.org/10.6009/jjrt.KJ00003103916
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  • [title in Japanese]
    Article type: Appendix
    1974 Volume 30 Issue 3 Pages 334-
    Published: September 30, 1974
    Released on J-STAGE: June 25, 2017
    DOIhttps://doi.org/10.6009/jjrt.KJ00003103917
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  • [title in Japanese]
    Article type: Appendix
    1974 Volume 30 Issue 3 Pages 335-
    Published: September 30, 1974
    Released on J-STAGE: June 25, 2017
    DOIhttps://doi.org/10.6009/jjrt.KJ00003103918
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  • [title in Japanese]
    [in Japanese]
    Article type: Article
    1974 Volume 30 Issue 3 Pages 336-
    Published: September 30, 1974
    Released on J-STAGE: June 25, 2017
    DOIhttps://doi.org/10.6009/jjrt.KJ00003103919
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    Article type: Article
    1974 Volume 30 Issue 3 Pages 336-
    Published: September 30, 1974
    Released on J-STAGE: June 25, 2017
    DOIhttps://doi.org/10.6009/jjrt.KJ00003103920
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    Article type: Article
    1974 Volume 30 Issue 3 Pages 336-
    Published: September 30, 1974
    Released on J-STAGE: June 25, 2017
    DOIhttps://doi.org/10.6009/jjrt.KJ00003103921
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    Article type: Article
    1974 Volume 30 Issue 3 Pages 336-
    Published: September 30, 1974
    Released on J-STAGE: June 25, 2017
    DOIhttps://doi.org/10.6009/jjrt.KJ00003103922
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  • [title in Japanese]
    Article type: Appendix
    1974 Volume 30 Issue 3 Pages 337-339
    Published: September 30, 1974
    Released on J-STAGE: June 25, 2017
    DOIhttps://doi.org/10.6009/jjrt.KJ00003103923
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  • [title in Japanese]
    Article type: Appendix
    1974 Volume 30 Issue 3 Pages 340-341
    Published: September 30, 1974
    Released on J-STAGE: June 25, 2017
    DOIhttps://doi.org/10.6009/jjrt.KJ00003103924
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  • [title in Japanese]
    Article type: Appendix
    1974 Volume 30 Issue 3 Pages 342-
    Published: September 30, 1974
    Released on J-STAGE: June 25, 2017
    DOIhttps://doi.org/10.6009/jjrt.KJ00003103925
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  • [title in Japanese]
    Article type: Cover
    1974 Volume 30 Issue 3 Pages Cover9-
    Published: September 30, 1974
    Released on J-STAGE: June 25, 2017
    DOIhttps://doi.org/10.6009/jjrt.KJ00003103926
    JOURNAL FREE ACCESS
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