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Volume 26 (1970)
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Volume 26, Issue 3
Displaying 1-19 of 19 articles from this issue
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Article type: Cover
1970 Volume 26 Issue 3 Pages Cover7-
Published: November 15, 1970
Released on J-STAGE: June 25, 2017
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Article type: Cover
1970 Volume 26 Issue 3 Pages Cover8-
Published: November 15, 1970
Released on J-STAGE: June 25, 2017
JOURNAL FREE ACCESSDownload PDF (688K) -
Article type: Appendix
1970 Volume 26 Issue 3 Pages App3-
Published: November 15, 1970
Released on J-STAGE: June 25, 2017
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[in Japanese]Article type: Article
1970 Volume 26 Issue 3 Pages 212-222
Published: November 15, 1970
Released on J-STAGE: June 25, 2017
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[in Japanese], [in Japanese], [in Japanese]Article type: Article
1970 Volume 26 Issue 3 Pages 223-235
Published: November 15, 1970
Released on J-STAGE: June 25, 2017
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[in Japanese], [in Japanese]Article type: Article
1970 Volume 26 Issue 3 Pages 236-243
Published: November 15, 1970
Released on J-STAGE: June 25, 2017
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TOHRU YASUI, TETSUO YAMA, SHIGEKI NISHIMURA, TOSIHIRO NISHIMURA, MAKIK ...Article type: Article
1970 Volume 26 Issue 3 Pages 244-256
Published: November 15, 1970
Released on J-STAGE: June 25, 2017
JOURNAL FREE ACCESSWe have studied the procedures to control the processing unit (Kodak RP X-OMAT Processor M6-N) by means of those procedures, i, e, pH Metry, Potentiometric titration in the direct control of the processing solution continuously, also the sensitometric procdure in the synthetic control. In this study, we have also checked the constancy of the mechanisms and the solutions of the processor. In addition, we made some experiments in order to study the propricty and the reliability of the various methods of control of the processing unit. The results are as follows : 1) We found satisfaction in the capacity of the 90 seconds unit. 2) It is desirable to control the solutions continuously for 6 or 12 months closely after the installation of the processing unit in order to decide the time of the renewal of the solutions and the quantity of the replenishment according to the exposure dose, sizd and number of the Roentgen films dealt with in each institution. 3) The continuons control of the solutions over 12 months is no more necessary because we can estimate the condition of the solution by the close observation of the daily X-ray film density. 4) The emphasis of the continuous control of the processing unit must be laid on the mechanical control and the cleaning of the apparatus so that we make use of the processor according to the rule based on the data of the control obtained right after the installation of the unit.View full abstractDownload PDF (1525K) -
TADASHIGE MAKINOArticle type: Article
1970 Volume 26 Issue 3 Pages 257-267
Published: November 15, 1970
Released on J-STAGE: June 25, 2017
JOURNAL FREE ACCESSThe formula is presented to obtain the absorption coefficient of the continuous X-rays for several phantoms. They are found experimentaly to have the same μ values as the portions of human body. The μ values depend on the followings ; flux area, phantom thickness, voltage, current and time. The formula is μ_2=A (λ^n+B), A=a・i_β・exp (-mx), where λ(Å) is the wave length of X-rays used, a, B, and n are the constant values for the portion of human body, i_β is the correction factor for current, and exp (-mx) is the term depends on the phantom thickness. This formula is extended from the formula reported previously. The values of these constant are obtained experimentaly and listed in the tables. Using this formula, the μ values of the portion of human body tested and I_0 (=λis) (mR) are calculated, and then, the exposure time s sec can be estimated easily. The results obtained are satisfactory for the practical cases. In this paper, the procedure to get the formula and the values of constants are reported. The formula is presented to obtain the absorption coefficient μ of the continuous X-rays for several phantoms whose μ values are the same as the portions of human body.View full abstractDownload PDF (959K) -
TAKISHI SAWADAArticle type: Article
1970 Volume 26 Issue 3 Pages 268-273
Published: November 15, 1970
Released on J-STAGE: June 25, 2017
JOURNAL FREE ACCESSIn radiotherapy it is very important the position and extent of the tumor volume. By the planning of the radiotherapy we always check the tumor localizatin and beam directin. The best method, we have found, is th check the extent of the lesion on the radiograpys. Therefore, we improved the deep x-ray therapy apparatus (Toshiba type KXO-19-7), in order to make a more accurate film of the tumor localization and its extent. The method of improvement of the apparatus and its practical use are shown.View full abstractDownload PDF (1544K) -
YUTAKA OSUMI, SIGEYUKI IKEDA, YUKIO FUKUTAArticle type: Article
1970 Volume 26 Issue 3 Pages 274-279
Published: November 15, 1970
Released on J-STAGE: June 25, 2017
JOURNAL FREE ACCESSIn order to secure a desirable position of neonates and infants during X-ray examination of the chest and abdomen, a special table has been designed. The baby is placed in supine position with his buttock in the hip-rest and his head in the head-holder, which is readily adjustable according to his sitting height. Then the head, chest and abdomen are strapped securely. The table can be held in standing position to allow A-P, oblique or lateral projection with the patient in upright position. With the table in horizontal position, it can be turned horizontally to either side as far as 90 degrees in each direction around a hinge placed at the top of the table to allow lateral projection from either side of the body.View full abstractDownload PDF (1865K) -
MASATSUNA ISHIZAKA, KOUICHI ENDOArticle type: Article
1970 Volume 26 Issue 3 Pages 280-290
Published: November 15, 1970
Released on J-STAGE: June 25, 2017
JOURNAL FREE ACCESSA questionaire survey was made in order to know actual condition of exposure and control for radiation workers (total number of 1779) in 1260 facilities including local health centers, national hospitals and sanatoria. The results can be summarized as follows : (1) Patterns of practice of X-ray radiology in health centers are similar to those in 1967 survey conducted by Ministry of Health and Weefare in general, but stomach and hipe-joint mass examinations are rinceasing to a lesser extent. (2) Instrumental improvment has been observed in the facilities for radiation protection, but control business seems insufficient. (3) Medical examination and measurment of personel exposure have been carried out almost satisfactorily, but feed back of the information to the employee seems not always satisfactorily done. (4) Fourty percent of the all cases of radiation hazard appeared within 5 years of employment. The number of cases is highest during 1950 and 1954 and it is decreasing since 1960. (5) About 30 percent of employee who showed any kind of symptoms of radiation hazard ard still working without undergoing satisfactory medical treatment.View full abstractDownload PDF (1188K) -
SHINSAKU TAKAHASHI, SHUSAKU MATSUKAWA, KEN MATSUMOTO, KYOKO ARIMA, MOT ...Article type: Article
1970 Volume 26 Issue 3 Pages 291-299
Published: November 15, 1970
Released on J-STAGE: June 25, 2017
JOURNAL FREE ACCESS(1) This apparatus was designed to automate a body contouring work for the purpose of the computerized treatment planning. (2) Patient's contour obtained by this apparatus was available to secure the reproducibility of positioning for radiotherapy. (3) Merits of this apparatus are summarized as follows. (A) Simple and Compact size (B) Low cost (C) Attachable to a simulater or treatment machine (D) High precision (E) Concideration as the input to computerView full abstractDownload PDF (2489K) -
SHINSAKU TAKAHASHI, SHUSAKU MATSUKAWA, KEN MATSUMOTO, KYOKO ARIMA, KIY ...Article type: Article
1970 Volume 26 Issue 3 Pages 300-304
Published: November 15, 1970
Released on J-STAGE: June 25, 2017
JOURNAL FREE ACCESS1 The present paper introduce a new type of immobilizer which was designed especially for pediatric service. 2 This device is a modification of the previously reported design 1 to improve the fixation of the head by application of the plastic holder to the temporal region of patient. 3 By the use of this instrument, the accuracy of treatment was remarkably improved.View full abstractDownload PDF (1027K) -
SENICHI TAKEYOSHIArticle type: Article
1970 Volume 26 Issue 3 Pages 305-317
Published: November 15, 1970
Released on J-STAGE: June 25, 2017
JOURNAL FREE ACCESSQuit a large number of researches on the controling system of the amount of X-ray in taking X-ray pictures have been conducted for as long as about 40 years throughout the world. Various studies in Japan too, have been made on the same subject for the indirect method to the stage where its practical utilization is possible. However, there still exist quite a few problems to be solved regarding the photo-timer of the direct method. The report tells us the results of the studies on the basic features of the pertinent photo-timer utilizing the ligh-taking window of the model lung. The studies covered such basic items as performance fluctuations, adjusting and conpensation methods for the density aiming at reaching the stage where the obtaining of a reproducible chest picture is possible.View full abstractDownload PDF (1443K) -
SENICHI TAKEYOSHIArticle type: Article
1970 Volume 26 Issue 3 Pages 318-323
Published: November 15, 1970
Released on J-STAGE: June 25, 2017
JOURNAL FREE ACCESSThere are many reports on the sensitivity, contrast and resolving power of medical X-ray films in the processing stage because their results would directory affect the diagonosis of a patient. However, availabe data and/or reports on the rinsing and fixing of the pertinent films are relatively limited in comparison with the aforementioned reports. Up to date, it presumably decided according to related books that the fixing time of an X-ray film is the duration twice as long as the period between the film is put into a fixing bath and the moment it becomes transparent. Urgent task to be tackled is the establishment of a scientific testing method for the X-ray film processing as an automatic X-rayed-film developing machine has been markedly prevailing recently. The mercuric chloride (corrosive sublimate) method has so far been employed as the best way for the amount-fixing-method, however, it is relatively difficult to utilize this formula both in time and technical aspects. So, as a practical substitute for the above-mentioned ways, I propose the employing of the densitymethod as well as the color-comparing method in judging the fixing time of X-rayed films as an expedient means for the daily usage. Utilizing the density-method, it is possible to process in 3.5 minutes some of the Japanese-made 6×6 indirect films that have been manufactured since this April taking the results of experiments on such films into the consideration. In addition, I would like to suggest that indirect films be identified whether they can be applicable to the automatic X-rayed-film developing machine. Finally, I am enthusiastically looking forward to an early setting-up of the JIS standards for the machine so that we can eliminate the capability and performance difierence of the various types of the machines manufactured by different makers.View full abstractDownload PDF (619K) -
TAKESHI SAWADA, OKINARI SOGAArticle type: Article
1970 Volume 26 Issue 3 Pages 324-330
Published: November 15, 1970
Released on J-STAGE: June 25, 2017
JOURNAL FREE ACCESSIn case of superficial x-ray therapy the position and size of the field is decided on the treatment-bed by radiography with supervoltage x-ray, in order to coincide it with the tumor region accurately. On the contrary it is not necessary to use this procedure in electronbeam therapy, because the tumor is usually superficial and easily palpable. But I believe, that in electron therapy also it is important to know that the localization of the tumor, the beam direction and the relation between the tumor and the neighboring sensitive organs. Therefore I consider the same technical procedure by the use of secondary radiation (Bremsstrahlen) during electron beam therapy as the localization-radiography by supervoltage x-ray. In this paper my experimental results are described.View full abstractDownload PDF (1679K) -
Article type: Appendix
1970 Volume 26 Issue 3 Pages 331-333
Published: November 15, 1970
Released on J-STAGE: June 25, 2017
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Article type: Bibliography
1970 Volume 26 Issue 3 Pages Misc1-
Published: November 15, 1970
Released on J-STAGE: June 25, 2017
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Article type: Cover
1970 Volume 26 Issue 3 Pages Cover9-
Published: November 15, 1970
Released on J-STAGE: June 25, 2017
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