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Article type: Cover
1976 Volume 32 Issue 4 Pages
Cover10-
Published: November 01, 1976
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Article type: Cover
1976 Volume 32 Issue 4 Pages
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Published: November 01, 1976
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Article type: Appendix
1976 Volume 32 Issue 4 Pages
i-iv
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SETSUO SASAKI
Article type: Article
1976 Volume 32 Issue 4 Pages
361-367
Published: November 01, 1976
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Purpose : In performing bone scanning at regular intervals for the purpose of evaluating the course of bone disease, all the scintigrams must be made under the same scanning conditions. This is because, on scintiphoto, the activity of bone tissue is expressed in black of different shades, which are dependent on scanning conditions. Even if all scintigrams are taken under the same scaning conditions, any change in disease activity cannot be visualized unless the change it expressed as a difference in the shade of darkening. Moreover, the difference is recorded qualitatively only. These problems all arise from the fact that photographic records are used in the follow-up of disease course. The authors thought it might be possible to make proper quantitative comparisons of scintigrams if such records are kept on the basis of counts input into a collimator without any previous processing. Method : Input from a whole-body scanner is stored in a matrix memory of a minicomputer. As necessary, the image of the area around the lesion is displayed on a cathode ray tube together with the input count, and the scanning counditions are also corrected as needed. Results : By this method, scanning can be performed under optimal conditions because no restrictions are imposed on them, and changes in disease condition can be evaluated quantitatively since disease activity is expressed in terms of count.
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YUKIO UCHIYAMA, KAZUHIRO TAKAHASHI, TOSHIO UEDA
Article type: Article
1976 Volume 32 Issue 4 Pages
368-374
Published: November 01, 1976
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Quimby system or Paterson-Parker system have been applied in clinical use as a reliable guide for the dose evaluation of intracavitary implantation of radium sources. Since the sources in the patient are never exactly as prescribed geometries, it is better that the calculation of dose distribution should be based upon the arrangement of the sources in the individual patient. Several computer methods for these dose estimations have been developed, and for the calculation, the methods of accurate approximations have been reported for these fifteen years. In this report, the program and the method of approximations to compute the dose distribution for actual implantation at the routine work with mini-computer were discussed. Conversational mode was applicated to obtain the input data, so the input errors could be easily found out and could be quickly corrected by the key board. The formulas of approximation reported by 4 authors were combined and compared each other, to find out the suitable computation. The images magnified on localization films were corrected to actual length of the sources automatically. Simpson's numerical integral was applied in case of the approximation for the absorption of Pt-filter and for water-air-ratio. The calculation was carried out regarding the line source as five-point sources. The doses were measured in a polystyrene cube phantom with insertion of 10 mg radium tube, and the calculated value agreed well with the experimental value. The dose distribution can be obtained on any desired plane. The area, which was printed out dose distribution, can be easily selected, therefore, the time is saved.
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KAZUTAMI TORIZUMI, MAKIKO OKAMOTO, SETHUKO KASHIWAGI, RYOSUKE NEGORO, ...
Article type: Article
1976 Volume 32 Issue 4 Pages
375-381
Published: November 01, 1976
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The Sample Oxidizer automatically prepares samples for liquid scintillation counting containing singlelabel tritium (^3H), single-label carbon-14 (^<14>C) or both nuclides in double-label. Double-label samples of tritium and carbon-14 are chemically separated during preparation. Recovery of tritium was about 90% with 0.2 gram of most materials. Recovery of carbon-14 was about 85%. Memory effect for tritium and carbon-14 was less than 0.6% with most samples. But Sample Oxidizer was not suitable for fatty samples. We adopt the "Sample Oxidizer Method" as to tissues, the "Hyamine 10X Method" as to fatty samples and the "Direct Method" as to serum.
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[in Japanese]
Article type: Article
1976 Volume 32 Issue 4 Pages
382-383
Published: November 01, 1976
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HISAO SHIDA, KOSUKE SASAKI, HIDEO ISAGO, KAZUNORI TOKI, TADAYUKI SAKAI
Article type: Article
1976 Volume 32 Issue 4 Pages
384-394
Published: November 01, 1976
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Radioisotope dynamic study is usefull fororgan functions but there are several problerms in the high speed dynamic study, for example, dead time correction for countloss, correction of random fluctation, dynamic cecrve analysis and quantitative measurement. It is better femoral vein injection than antecubital vein injection for well maintainning of the isotope bolus. The time interval of the serial scintigram must be 0.1 sec for measurement of the left ventricle ejection fluction and representation of the shunt curve. Two compartment analysis, height over area methode and intial slope methode are suitible for the clearance curve analysis.
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KIYOTAKA ASAHINA, MAKOTO KAKEGAWA, HIROSHI FUJIKI, KENJI SUZUKI
Article type: Article
1976 Volume 32 Issue 4 Pages
395-404
Published: November 01, 1976
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The dynamic function study which is performed by injecting radiopharmaceutical to the human body and detecting the time variation of the volume of the radioisotope (Hereinafter referred to as RI.) at the various internal organs from outside the body is provided with such eminent characteristics as being safer, more accurate and afflicting less pain to the patient as compared with other methods of study (i.e. dye dilution and insertion of catheter. Systems for studying dynamic functions have made a plain and simple development as compared with the RI imaging equipment represented by gammacamera but recently dynamic functions are studied extensively by using gammacamera. CT scanner also came to be used in since last year and therefore it became necessary to reevaluate RI imaging and dynamic function study.
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YOSHIMI KUSUMI, MAKOTO HAYASHI, YASUMITU KAWAGOE, MITSURU KOMIZU, YOSH ...
Article type: Article
1976 Volume 32 Issue 4 Pages
405-414
Published: November 01, 1976
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Recently, the Anger-cameras with their accessory systems were developed for RI dynamic studies. The accessory system consists of RI data processing devices and recording attachments such as polaroid camera, time lapse camera, multiformat camera, VTR recorder, pen recorder etc.. Main technical problems of the Anger-cammera in the dynamic studies are uniformity, linearity, resoluing performance and dead-time loss. For the improvement of these problems and the accurate data collection, we developed software system such as correction of uniformity and dead-time loss in the RI data processor (minicomputer). In conclusion, these processings using the digital computer system are useful for quantitative dynamic study and available for routine work.
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KOUICHI SATO
Article type: Article
1976 Volume 32 Issue 4 Pages
415-423
Published: November 01, 1976
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Following three technical problems on RI angiocardiograrhy (RI-ACG) were examined with combined use of an Anger scinticamera and VTR : 1) method and technic of RI-ACG examination by means of R-wave on ECG as a trigger. 2) applicability of an Anger scinticamera and VTR to dynamic study in terms of sensitivity, resolution, dead time and soon. 3) several problems on analysing data to estimate the left ventricular volume and the ejection fraction. This RI-ACG method is non-invasive and can be safely and repeatedly performed in severely ill patients and can give the comparable volues for SV, and EF as the cineangiographic method. Scinticamera as an apparatus on the dynamic study is expected much of good performance such as high sensitivity, resolution and short deadtime, and the computer analysis is also necessary for the dynamic study.
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YOSHIKAZU SAWAI, IZEICHI ISHII, MITUMASA KOMURA, KAZUEI TAKAHASHI, NOB ...
Article type: Article
1976 Volume 32 Issue 4 Pages
424-432
Published: November 01, 1976
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A small computer (HITAC-10 8 K words) was interfaced to a 4 channel renogram unit and time activity curve was analyzed to get functional. From a radiocardiogram, cardiac output was determined. The value obtained by a computer method was comparable to that by manual calculation. From a renogram, effective renal plasum flow was determined. In such a procedure, it was important to measure radioactivity of administered dosage and obtained plasma precisely. We have also applied this method to analyze radioisotope penogram. Radioisotope penogram was used to differentiate functional and organic impotence. The blood volume of erected penis was calculated with ^<99m>Tc labelled autologus red blood cell. When the blood volume reached 30ml erection was obserbed.
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Article type: Appendix
1976 Volume 32 Issue 4 Pages
433-438
Published: November 01, 1976
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Article type: Appendix
1976 Volume 32 Issue 4 Pages
439-442
Published: November 01, 1976
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[in Japanese], [in Japanese], [in Japanese], [in Japanese]
Article type: Article
1976 Volume 32 Issue 4 Pages
443-
Published: November 01, 1976
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[in Japanese], [in Japanese], [in Japanese]
Article type: Article
1976 Volume 32 Issue 4 Pages
443-
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[in Japanese], [in Japanese]
Article type: Article
1976 Volume 32 Issue 4 Pages
443-
Published: November 01, 1976
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[in Japanese], [in Japanese]
Article type: Article
1976 Volume 32 Issue 4 Pages
443-
Published: November 01, 1976
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[in Japanese], [in Japanese], [in Japanese], [in Japanese], [in Japane ...
Article type: Article
1976 Volume 32 Issue 4 Pages
443-444
Published: November 01, 1976
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[in Japanese], [in Japanese]
Article type: Article
1976 Volume 32 Issue 4 Pages
444-
Published: November 01, 1976
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[in Japanese], [in Japanese], [in Japanese], [in Japanese], [in Japane ...
Article type: Article
1976 Volume 32 Issue 4 Pages
444-
Published: November 01, 1976
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[in Japanese]
Article type: Article
1976 Volume 32 Issue 4 Pages
444-
Published: November 01, 1976
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[in Japanese], [in Japanese], [in Japanese], [in Japanese]
Article type: Article
1976 Volume 32 Issue 4 Pages
444-
Published: November 01, 1976
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[in Japanese], [in Japanese], [in Japanese], [in Japanese], [in Japane ...
Article type: Article
1976 Volume 32 Issue 4 Pages
444-445
Published: November 01, 1976
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[in Japanese], [in Japanese], [in Japanese], [in Japanese]
Article type: Article
1976 Volume 32 Issue 4 Pages
445-
Published: November 01, 1976
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[in Japanese], [in Japanese], [in Japanese], [in Japanese]
Article type: Article
1976 Volume 32 Issue 4 Pages
445-
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[in Japanese], [in Japanese], [in Japanese], [in Japanese], [in Japane ...
Article type: Article
1976 Volume 32 Issue 4 Pages
445-446
Published: November 01, 1976
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[in Japanese], [in Japanese], [in Japanese], [in Japanese]
Article type: Article
1976 Volume 32 Issue 4 Pages
446-
Published: November 01, 1976
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Article type: Article
1976 Volume 32 Issue 4 Pages
446-
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[in Japanese]
Article type: Article
1976 Volume 32 Issue 4 Pages
446-
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[in Japanese]
Article type: Article
1976 Volume 32 Issue 4 Pages
446-447
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[in Japanese]
Article type: Article
1976 Volume 32 Issue 4 Pages
447-
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Article type: Article
1976 Volume 32 Issue 4 Pages
447-
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Article type: Article
1976 Volume 32 Issue 4 Pages
447-448
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[in Japanese]
Article type: Article
1976 Volume 32 Issue 4 Pages
448-
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[in Japanese]
Article type: Article
1976 Volume 32 Issue 4 Pages
448-
Published: November 01, 1976
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[in Japanese], [in Japanese], [in Japanese], [in Japanese], [in Japane ...
Article type: Article
1976 Volume 32 Issue 4 Pages
448-
Published: November 01, 1976
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Article type: Article
1976 Volume 32 Issue 4 Pages
449-
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[in Japanese]
Article type: Article
1976 Volume 32 Issue 4 Pages
449-
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[in Japanese], [in Japanese], [in Japanese], [in Japanese], [in Japane ...
Article type: Article
1976 Volume 32 Issue 4 Pages
449-
Published: November 01, 1976
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[in Japanese], [in Japanese], [in Japanese]
Article type: Article
1976 Volume 32 Issue 4 Pages
449-
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[in Japanese]
Article type: Article
1976 Volume 32 Issue 4 Pages
449-
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[in Japanese]
Article type: Article
1976 Volume 32 Issue 4 Pages
449-450
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Article type: Article
1976 Volume 32 Issue 4 Pages
450-
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Article type: Appendix
1976 Volume 32 Issue 4 Pages
451-452
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Article type: Appendix
1976 Volume 32 Issue 4 Pages
453-456
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Article type: Appendix
1976 Volume 32 Issue 4 Pages
457-
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Article type: Cover
1976 Volume 32 Issue 4 Pages
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Published: November 01, 1976
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