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Article type: Cover
1983 Volume 39 Issue 3 Pages
Cover7-
Published: May 01, 1983
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Article type: Cover
1983 Volume 39 Issue 3 Pages
Cover8-
Published: May 01, 1983
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Article type: Index
1983 Volume 39 Issue 3 Pages
Toc3-
Published: May 01, 1983
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Article type: Appendix
1983 Volume 39 Issue 3 Pages
i-iii
Published: May 01, 1983
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KOICHI YOKOYAMA, HISAYOSHI SAWAYANAGI, TOMOYOSHI FUKUDA, SHIGEO HASHIM ...
Article type: Article
1983 Volume 39 Issue 3 Pages
224-233
Published: May 01, 1983
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It is now evident that a considerable amount of photoneutrons are produced in a medical electron linac ranging from 10-15 MeV which is commonly used in our country. We have measured the thermal and fast neutron dose in both 10 and 15MV photon modes using the indium foil activation method and the etch pit method employing a CR-39 plastic track recorder. Leakage radiation dose levels outside the treatment room have also been measured with a remcounter and a photon survey meter. In this paper, the results of the measurements are presented and the feasibility of these methods is discussed. In view of the advantageous characteristics of the CR-39 detector such as sensitivity to low energy neutrons, photon insensitivity, flat response and almost no fading, and the fact that only simple setups and measuring techniques are required, the etch pit method using the CR-39 was found to be a practical means for measuring fast neutrons accompanying an X-ray beam of a medical accelerator.
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TETSUO OKUDA, MASAKATSU HATAGAWA
Article type: Article
1983 Volume 39 Issue 3 Pages
234-239
Published: May 01, 1983
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In is troublesome to calculate the exposure factor for each equipment, in case when lots of X-ray equipment are used. We made a test piece, and obtained the difference of the X-ray output of each equipment from the deinsity of the test piece image. Using this output difference, the exposure factor of one piece of equipment can be calculated from the data obtained in the test equipment. Furthermore, if the X-ray output changes, the exposure factor can be easily corrected using this method. As a result of the dispersion analysis, this method was found to be satisfactorily reliable in general use.
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[in Japanese]
Article type: Article
1983 Volume 39 Issue 3 Pages
240-270
Published: May 01, 1983
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ISAO KANAMORI, TOKUJI KIMURA, HIDEO ICHIKAWA, HATUO TURUTA, SADAO TATS ...
Article type: Article
1983 Volume 39 Issue 3 Pages
271-275
Published: May 01, 1983
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The concept and system of emergency medicine have changed remarkably in recent years. Although the life preserving system on the part of those who give medical treatments differs in conception from socalled emergency cases on the part of those who undergo medical treatments, these two can not be separated from each other when the emergency system is discussed. The accomplishment of emergency medicine needs the cooperation and harmony among medical departments and diagnostic laboratories, not excepting the department of radio-nuclear mePicine. It is also needed to cope with emergency cases of infinite variety. As a of course, these give rise to a great deal of problems. The development of apparatuses exclusive for life preserving medicine and the training of special techniques are essential to solve the problems. In addition, it seems necessary to reconsider the education of radiotechnology in Japan with renewing our understanding of emergency medicine. It appears to be one of the most urgent needs to improve the present situation that depedds mostly on the philanthropism and selfsacrificing spirit of doctors, nurses, radiotechnologists and other medicine in the wide sense of the word including so-called emergency cases in paralled with changes of social conditions.
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TOMONORI HISADA, KAZUO UCHIMA, TETSU SAKUGAWA, ZENYU SHIMABUKURO
Article type: Article
1983 Volume 39 Issue 3 Pages
276-278
Published: May 01, 1983
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The medical field is becoming more sophisticated with more specialization into every branch of medicine. Currently, doctors and nurses are carring out reseach on medical treatment after their normal working hours at the emergency center. The radiologic technologists at this hospital must perform many different types of medical tasks, which includes X-ray examinations, CT, RI and angiographies. We are required to have expert knowledge of the radiology fields, for we are a members of the emergency medical staff. However, we are lacking the require number of proffessional people, training periods, proper defects in facilities, improvement in labor conditions, etc. These are the problems we are facing in this field.
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MICHIKO KOJIMA, MASARU THUKADA, YUTAKA YAMAGISHI, SATORU OGASAWARA, KA ...
Article type: Article
1983 Volume 39 Issue 3 Pages
279-283
Published: May 01, 1983
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In recent years, the incidence of traffic accidents, falls, public nuisances and mental disorders has increased due to the progress in motorization and the changes in the environment of city life. However the population of aged persons is dramatically increasing year after year. It is because of these problem that we must rationalize the emergency medical system to comply with the recent social demands. The purpose of this paper is to consider the roles of our radiological technologists as regards emergency medical treatment.
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MASAHARU HIROSE, TOSHIO ENDO, TOMIO AOKI
Article type: Article
1983 Volume 39 Issue 3 Pages
284-287
Published: May 01, 1983
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This is a report of the basic idea on imaging system focussing on a necessary X-ray system for high-level emergencies which was worked out due to the establishment of the independent emergency medical institute specialized in the tertiary lifesaving and emergency, and of examinations on satisfactory results we gained for about three years of usage.
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KATSUMI NAGASAWA, HITOSHI YAMAGISHI, KATSUYASU SATO
Article type: Article
1983 Volume 39 Issue 3 Pages
288-290
Published: May 01, 1983
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We use ORBIX for radiographic study of optic cannal study of optic canal as routine procedure. In emergency cases it is much needed that we have clear and prompt radiograph of the patient. Recently we have made an experimental study on radiograph of optic canal with ordinary head phantom and our own experimental one. The result showed that the length of optic canal affects the clearness of the radiograph and we were able to find a proper way to adjust α angle and β angle of ORBIX. We also report the frequency in use of ORBIX in emergency cases at our hospital in the last year.
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KIYOSHI OGAWA
Article type: Article
1983 Volume 39 Issue 3 Pages
291-295
Published: May 01, 1983
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Scintigraphy is just right for diagnosing emergency cases due to its noninvasive and simple method, but emergency radionuclide studies have not become practical as a result of difficulty problems. Recetly, nuclear medical devices have become easier to use in operations. It is become of this, that I have submitted this report regarding the problems of radionuclide studies in emergency cases. There were 101 cases (1.4%) out of 7,310 cases for the year period. (1981.9〜1982.8) The studies consisted of 12 brain imaging cases, 9 plumonary imaging cases, 22 cardiac study cases (8 cardioangiography cases, 12 99m-Tc-PYP myocardium imaging cases, 2 201-Tl myocardium imaging cases), 12 renal study cases, 11 G.I. blood loss cases, 35 peripheral angiography cases. In the near future, we will have to be ready to perform emergency radionuclide studies if the need arises.
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TOSHIAKI KAWACHI, HIDEO ICHIKAWA, MINORU HIKITA, TOKUJI KIMURA, HATSUO ...
Article type: Article
1983 Volume 39 Issue 3 Pages
296-299
Published: May 01, 1983
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Computed Tomography (CT) was performed on 786 patients and ultrasonography (US) on 83 at patients the emergency medical attendance after normal working. We experienced a lot of problems awaiting solution. As a result of this study, we think that the man who treat the emergency examination is necessary to receive the emergency training and practice in addition to the various image.
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KAZUO UCHIMA, TETSU SAKUGAWA, TOMONORI HISADA
Article type: Article
1983 Volume 39 Issue 3 Pages
300-304
Published: May 01, 1983
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Recently an increasing number of facial injuries are due to traffic accidents. Zygomatic bone fracture is one of the most common facial injuries. However, it is difficult to find and diagnose, as a result of the swelling due to the impact of the traffic accident. In fact, Water's view is the most popular technique for projection the zygomatic bone. The best way of diagnosing is Water's 3-angle ways projection method. It is the result of our experiment in the classification of malar fracture, by Knigth and North. Likewise, we have reported on the evaluation of facial injuries using C.T.
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MAKIO OKA, CHIBA NOBUYUKI, TETSUO MIYAGI
Article type: Article
1983 Volume 39 Issue 3 Pages
305-310
Published: May 01, 1983
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An acute abdomen is one of the main topics among emergency practice for children. We have experiencing about 300 acute abdomen cases per year at our Children's Hospital since 1970. We radiological technologists provide a 24-hour emergency service using special knowledge and techniques in our radiological investigation. In the noenatal period esophageal atresia should be diagnosed by plain up-right film with a coiled-up rubber tube, and a contrast examination is contraindicated to prevent severe aspiration pneumonia. In the cases with intestinal atresia, the contrast examination is rot neccessary again, because the findings of plain film such as the distribution of air-filled intestinal loops, dilated bowel with air-fluid level gives us enough information for the diagnosis of these congenital anomalies. On the contrary, barium enema is useful and harmless for the neonatal age group. It is practical for diagnosing Hirschsprung's disease, midgut malrotation with volvulus, ileal and colonic atresia and necrotizing enterocolitis. An imperforate anus should be classified into the high and low type in the neonatal period to define the treatment. Invertogram is an only way for the differentiation of a baby without external fistula, and we have established the tcehnique for this. The level is diagnosed by the relationship between the gas-filled rectal pouch and ischiac bone. In the infant group intussusception is the most common and urgent acute abdomen. We use a special device to fix the bady, dilute the barium with warm saline (to avoid water intoxication), limit the water pressure to within one meter, and avoid abdominal manipulation and longtime exposure. The successful reduction rate that our team has obtained is almost 85%.
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[in Japanese]
Article type: Article
1983 Volume 39 Issue 3 Pages
311-313
Published: May 01, 1983
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HISAO YAMADA, MITSURU YAMAGUCHI, TAKASHI GOTO, MITSUO SAITO, TAKENORI ...
Article type: Article
1983 Volume 39 Issue 3 Pages
314-317
Published: May 01, 1983
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In stereography, 5 factors should be considered in the reconstruction of a three-dimensional image. 1. Focal interval of the rediographical system. 2. Pupil-pupil distance of the observer. 3. Focus-film distance of the radiographical system. 4. Film-pupil distance of the viewing system. 5. Film arangement of the stereographical system. We have investigated stereographical image distortion caused by exposure at various focal distances.
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YASUSHI OZAWA, HAJIME TAKEMOTO, TAKASHI NAKAHORI
Article type: Article
1983 Volume 39 Issue 3 Pages
318-321
Published: May 01, 1983
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This paper describes a method for observing a magnified stereoscopic X-ray image without any distortion. By attaching a kind of telescope to the eyepiece of a stero-viewer, the observer can see a magnified image 1.6 time larger. The three-dimensional structure of very thin vessels could be observed a lot better than without any optical magnification.
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KATSUHEI HORITA, KEIICHI HASEGAWA, MITSUTOSHI NAITOH, TADAO ABE, MAMOR ...
Article type: Article
1983 Volume 39 Issue 3 Pages
322-325
Published: May 01, 1983
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Serial stereoscopic magnification radiography was easily performed due to the development of a device which has a microfocus rotating within the same X-ray tube housing. Comparied with contact stereoscopic radiography, there are some advantages in this technique, such as an increase in detail recognition, higher quality images anda decrease in the exposure of patients to radiation. In this study, we evaluated the followings using the X-ray tube for serial stereoscopic magnification radiography. 1. Modulation for the microfocal spot size.While the focusing voltage or the tube current was appropriately changed, the focal spot became smaller almost being reduced to the nominal spot size. 2. Comparison of the discrimination between in the stereoscopic magnification technique and the contact stereoscopic technique. The former's focal spot separation was 25mm or 50mm, and the latter was 100mm. 3. Stereoscopic image using our originaal charts and scales.
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KENSUKE ITO, KOUZI SHIMA, NORITAKE AKAIWA, HIROSHI MATUURA
Article type: Article
1983 Volume 39 Issue 3 Pages
326-329
Published: May 01, 1983
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The stereo macroradiography was conducted using two methods : one is to rotate the object and the other is to shift the object. We studied stereoscopic magnification radiography with four-fold, eight-fold, twelve-fold and sixteen-fold magnification. When we rotated the object at six-degrees, we obtained a very good stereoscopic magnification radiography at all magnification ratio. In the shifting method, when the object was shifted 20 mm during four-fold and eight-fold magnification, we obtained a very good stereoscopic magnification radiography.
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HIDEAKI TOGI, YASUNOBU MATUI, TOSHIYA SANO, TAKASHI WAKAMATSU
Article type: Article
1983 Volume 39 Issue 3 Pages
330-332
Published: May 01, 1983
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Because of the different inter-focal shifting distances, the macrostereoangiographic X-ray tubes developed recently by various makers, naturally have differences in depth, for example, in case of observations and differ in steric effect according to the observating condition, as well. Studies made of these issues revealed that the angle of deviation for X-ray tube was optimum for 2° to 3° and the magnification (M) was proportional to 1/M^<1.5>.
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NOBUO INABA, KATSUHIKO UEDA, SHUICHI YAMAUCHI, SADATO TANAKA, HIDEAKI ...
Article type: Article
1983 Volume 39 Issue 3 Pages
333-336
Published: May 01, 1983
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Magnified stereoscopic radiography using the C-arm system was applied for the skull. Simplification of the positioning by this system gave markedly reproductive roentgenographs of the head having complicated structures. Stereoscopy facilitated recognition of the anatomical relationship and extent of involvement of the head.
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TOMOYOSHI MIHARU, SHOZO NAKANISHI
Article type: Article
1983 Volume 39 Issue 3 Pages
337-340
Published: May 01, 1983
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Stereoscpic radiography of a plain skull and chest were examined. The relationship between the visibility of a stereoscopic image and contrast, and between the former and the shape of the object ware studied. The relationship between the visibility of a stereoscopic image and the sliding direction of the X-ray tube was also examined. Skull and chest phantoms are used in this study. In the case of A-P skull view, we can get the stereoscopic view very easily, when the beam was titled cranially with 45°of the base line. It was very easy to see the chest radiography when the X-ray tube was slid with the direction of 45°oblique to the axis. When the contrast of the image was 0.05 or less, it was difficult to get any stereoscopic images.
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NOBUHIRO ODA, OSAMI YASUI
Article type: Article
1983 Volume 39 Issue 3 Pages
341-344
Published: May 01, 1983
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The optimal magnification factor, the effective method to decrease the scattered X-ray and advantage of a compensation filter in magnification radiography were evaluated. The results are as follows : 1) Optimal magnification factor was decided by the MTF of the recording system and the focal spot. 2) Amount of the scattered X-ray was influenced by the quality of the screen and material of the front compression plate of the film changer. 3) Use of the compensation filter is more effective than the use of the grid, to avoid an excessive load on the equipment and to eliminate the foging.
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YASUNORI ISHII, TOSHIO YAMAMURA, TAKESHI MURAKI, KOHSAKU NISHIO, YUKIO ...
Article type: Article
1983 Volume 39 Issue 3 Pages
345-349
Published: May 01, 1983
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Heavy duty -500 kHU TOTANODE- X-ray systems are useful for stereo angiography with an increase in the magnification Each X-ray tube has a 125mm diameter heavy duty target disc, metal envelope, high emissivity cathode, and a high-speed revolving mechanism (10,800rpm). DRX-W625HD-SA has twin 0.2 mm foci (11 kW) and 1.2 mm focus (100kW). Twin foci can be instantaneously switched alternately by an electronic control unit using switching tubes. This X-ray tube is suitable for magnification stereo angiography and also suits for general and magnification angiography. DRX-W135HD-SA has twin 1.0 mm foci (80kW) and 0.2 mm focus (11 kW). It is suitable for contact stereo angiography. DRX-5526HD-SA and DRX-5546HD-SA have a high power variable size focuses (0.2-0.1 mm) and large focuses. DRX-5536HD has 0.2 mm focus and 1.0 mm focus. They are suit able for general and magnification angiography. The components were also designed to accomplish the above purposes. For example, the new stereo collimator has four shield wings which move independently and changes two light field synchronized with a change fin the focuces.
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HIROHUMI HIGASHIMARU, KYOSUKE YASUKOHCHI, HITOSHI BABA, EISYUH SHINKAI ...
Article type: Article
1983 Volume 39 Issue 3 Pages
350-353
Published: May 01, 1983
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Focal MTF and resolution on the pendulm shift of the X-ray focal system was evaluated and measured as regards vibration and noise on a 17,000 round per minit (rpm) tube and compared with those on the 10,000 rpm one. Also, the refomation of collimation and the AOT system, etc. are describead.
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YUJI KAGA, KIN-ICHI YAMADA, SATOSHI SUZUKI, SHIGEO KINAI
Article type: Article
1983 Volume 39 Issue 3 Pages
354-358
Published: May 01, 1983
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We have introduced some technical improvements in cerebral stereoscopic magnification angiography to obtain a higher contrast image of the small vessels, The results are as followe. (1) Increased the tube current in the twin focus tube. (2) Used of a specially designed diaphragm and compensatory filters without a grid. (3) Employment of more X-ray translucent materials (carbon-fiber reinforced plastic) for the patient's table and front plate of the film changer. (4) Slight prolongation of exposure time and injection period of contrast material.
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TAKASHI HATAYAMA, YASUO WATANABE, RYOJI KAMADA, HATSUO MIURA
Article type: Article
1983 Volume 39 Issue 3 Pages
359-361
Published: May 01, 1983
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The quality of stereomagnified serial angiogram was improved as follows. 1) The current of the twin focal X-ray tube was increased from 60 to 70mA. 2) Scattered radiation was efficiently absorbed by several exposed X-ray films positioned on the PUCK instead of the absorbing grid. 3) Exposure time of the PUCK was extended from 0.1 sec to 0.13 sec. Thus, the number of mAs was increased from 6.0 to 9.1.
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TOSHIYA SANO, ISAO TANAKA, TAKASHI WAKAMATSU
Article type: Article
1983 Volume 39 Issue 3 Pages
362-365
Published: May 01, 1983
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Cardiac disorders due to myocardial infarction, coronary arterial disease and other causes are increasing year by year. Thus there is a keen demand for improvements in diagnostic ability of the cardiovascular roentgenographic system. We took macrograph using a tube for high performance cine-radiography (focus : 0.6×0.6 mm) and obtained good results on both MTF and scattered rays. The compilation of cine-films stereographed with an I. I. tube-moving technique and the observation of the films using a PLZT electron shutter made the stereopicture of animal body viewable.
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KAZUO AWAI, HIDEAKI TOGI, TAKASHI WAKAMATSU
Article type: Article
1983 Volume 39 Issue 3 Pages
366-369
Published: May 01, 1983
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DSA images by I. I-TV system remain unfinished due to some factors such as performances of the equipment, leaving room for improvements. Therefore, improvements were made in image quality by macrography. A number of special issues were also presented, and stereography was applied as a means of making up its faults.
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[in Japanese]
Article type: Article
1983 Volume 39 Issue 3 Pages
370-371
Published: May 01, 1983
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[in Japanese], [in Japanese], [in Japanese], [in Japanese], [in Japane ...
Article type: Article
1983 Volume 39 Issue 3 Pages
372-384
Published: May 01, 1983
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Harrison RM
Article type: Article
1983 Volume 39 Issue 3 Pages
385-
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Dencker L
Article type: Article
1983 Volume 39 Issue 3 Pages
385-386
Published: May 01, 1983
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Wheldon TE
Article type: Article
1983 Volume 39 Issue 3 Pages
386-
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Article type: Appendix
1983 Volume 39 Issue 3 Pages
387-388
Published: May 01, 1983
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[in Japanese]
Article type: Article
1983 Volume 39 Issue 3 Pages
389-
Published: May 01, 1983
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[in Japanese], [in Japanese], [in Japanese], [in Japanese]
Article type: Article
1983 Volume 39 Issue 3 Pages
389-
Published: May 01, 1983
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[in Japanese]
Article type: Article
1983 Volume 39 Issue 3 Pages
389-390
Published: May 01, 1983
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[in Japanese], [in Japanese], [in Japanese]
Article type: Article
1983 Volume 39 Issue 3 Pages
390-
Published: May 01, 1983
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[in Japanese], [in Japanese], [in Japanese], [in Japanese]
Article type: Article
1983 Volume 39 Issue 3 Pages
390-391
Published: May 01, 1983
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[in Japanese], [in Japanese], [in Japanese], [in Japanese]
Article type: Article
1983 Volume 39 Issue 3 Pages
391-
Published: May 01, 1983
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[in Japanese], [in Japanese], [in Japanese], [in Japanese]
Article type: Article
1983 Volume 39 Issue 3 Pages
391-
Published: May 01, 1983
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[in Japanese], [in Japanese], [in Japanese], [in Japanese]
Article type: Article
1983 Volume 39 Issue 3 Pages
391-
Published: May 01, 1983
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[in Japanese], [in Japanese], [in Japanese], [in Japanese]
Article type: Article
1983 Volume 39 Issue 3 Pages
391-392
Published: May 01, 1983
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[in Japanese]
Article type: Article
1983 Volume 39 Issue 3 Pages
392-
Published: May 01, 1983
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[in Japanese], [in Japanese], [in Japanese], [in Japanese]
Article type: Article
1983 Volume 39 Issue 3 Pages
392-
Published: May 01, 1983
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[in Japanese], [in Japanese], [in Japanese], [in Japanese], [in Japane ...
Article type: Article
1983 Volume 39 Issue 3 Pages
392-
Published: May 01, 1983
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[in Japanese], [in Japanese], [in Japanese], [in Japanese]
Article type: Article
1983 Volume 39 Issue 3 Pages
392-
Published: May 01, 1983
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