RADIOISOTOPES
Online ISSN : 1884-4111
Print ISSN : 0033-8303
ISSN-L : 0033-8303
Volume 20 , Issue 11
Showing 1-14 articles out of 14 articles from the selected issue
  • Takami KOYANAGI, Kazuo AIDA
    1971 Volume 20 Issue 11 Pages 573-578
    Published: November 15, 1971
    Released: September 07, 2010
    JOURNALS FREE ACCESS
    Overall response function of the thickness gauging system composed of a radiation source and a ionization chamber is calculated theoretically on the simple principle known as “the rectilinear propagation of light”. This function can be calculated from the response functions of each element of the system. In this system the source is of some extent, and the object is interposed between the source and the chamber, casting a blurred shadow on the chamber greater than itself.
    The response function of ionization chamber or radiation source is experimentally obtained from the Fourier-transform of the differential of the transient response measured by scanning a shelter plate close to the surface of the subject.
    The response functions of cylindrical and spherical chambers with circular, square and rohmbic windows and a radiation source (90Sr) are obtained theoretically and experimentally. These two results are in good agreement.
    As to the overall response function, the theoretical values disagree with the experimental values. This must be caused by the effects of scattered β-rays.
    The amount and the response function of the scattered rays are remained unknown and left as the next problem to be studied.
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  • 1971 Volume 20 Issue 11 Pages 577
    Published: 1971
    Released: July 21, 2010
    JOURNALS FREE ACCESS
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  • Takeshi TOMINAGA, Masao ISHII, Nobufusa SAITO
    1971 Volume 20 Issue 11 Pages 579-581
    Published: November 15, 1971
    Released: September 07, 2010
    JOURNALS FREE ACCESS
    Eight cobaltammine bromides, [Co (NH3) 5X] Br2, 3 (X=NH3, H2O, halogens, etc.) were irradiated with thermal neutrons at dry ice temperature in a TRIGA reactor. The chemical distribution of 82Br atoms arising from 81Br (n, γ) 82Br and 81Br (n, γ) 82mBr (IT) 82Br transformations was determined by means of ion exchange method. Since the 82Br ligand yields (the percentages of total produced 82Br complexed with cobalt) obtained experimentally were the overall yields from the composite effects of the above transformations, the 82Br ligand yields from 82mBr (IT) 82Br recoil reactions alone were estimated by making adequate assumptions. The estimated 82Br ligand yields from 82mBr (IT) 82Br reaction were found to vary with the kind of ligand, X, in the target complexes. The correlation appears to be similar to that observed with 80mBr (IT) 80Br reaction.
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  • Naoya IWASAKI, Shigeru SHIBATA, Yoichi KASAI, Yoshiro MITO
    1971 Volume 20 Issue 11 Pages 582-587
    Published: November 15, 1971
    Released: September 07, 2010
    JOURNALS FREE ACCESS
    To get an available liver scintigram in diagnosis, we endeavored to select a nuclide for use (a radioparmaceutical) and to improve a scanner as well as the scanning technique itself.
    This time, we made the examination on liver scintigrams of 100 cases using 113mIn-colloid, and obtained the following results. Seventy to ninty per cent of 113mIn-colloid is accumulated in liver and the remainder is distributed in spleen, bone-marrow and so on. The short half-life of 113mIn (1.73 h) makes it possible to perform the mass dosage, thereby reducing the required time for scanning.
    Furthermore, the scintigram thus obtained is fine enough.
    Reciprocal comparison of the detective ability among the results obtained by the use of 99mTc-colloid, 198Au-colloid and by the use of 113mIn-colloid was made also. From above data, it was proved that against 99mTc-colloid is available for the detection of a shallow space occupying lesion, 198Au-colloid is useful for the detection of a deep space occupying lesion. 99mTc-colloid showed both of those two merits. lii addition, as well as in the case of 99mTc-colloid, we can easily obtain the spleen figure using 113mIn-colloid.
    Neither any pyrexia nor histaminia as a side effect was observed in 104 cases under the experiments with 113mIn-colloid.
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  • Akira OGISO, Rie YOSHIDA, Kazuo UMENO, Toshiharu AKUTSU, Kozo MATSUMOT ...
    1971 Volume 20 Issue 11 Pages 588-596
    Published: November 15, 1971
    Released: July 21, 2010
    JOURNALS FREE ACCESS
    99mTc and 113mIn are much harmless to the patients than the other radioisotopes, such as 198Au, 131I, 203Hg, etc., since their half lives are shorter. So that they can be given in much more doses and used broadly in scanning the brain, lung, liver, spleen, kidney, placenta, bone marrow, cardiac pool, etc. 113mIn is produced from 113Sn-113mIn generator by milking and due to its short half life, the generator can be eluted several times a day, and can be used for a long time, even more than 6 months, because the half life of 113Sn is 118 days long.
    The simplified preparation of reliable scanning agents is made possible by use of a closed generator system and pre-sterilized vials containing the appropriate chemicals to make the specific radio pharmaceuticals.
    Liver scanning with 113mIn (OH) 3-colloids was tried on 41 cases, such as hepatitis, cirrhosis, tumors, etc.
    In this way diagnostically available images were obtained in all cases.
    The liver uptake of injected 113mIn (OH) 3-colloids intravenously was 85% on an average in normal cases, and liver radiation dose from 2 mCi 113mIn (OH) 3-colloids was about 0.85 rads.
    Contamination of 113Sn in 113mIn was identified with hematoxylin method, and it was less than 0.003% in concentration.
    Therefore 113mIn is very available isotope for liver scanning. (Received July 10, 1971)
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  • Katsushi WATANABE, Masataka INAKURA, Kenjiro KAWAHIRA, Chikashi NAKAYA ...
    1971 Volume 20 Issue 11 Pages 597-602
    Published: November 15, 1971
    Released: September 07, 2010
    JOURNALS FREE ACCESS
    We reported the results of brain scintigraphy in 48 cases using 113mIn-DTPA kit that can be prepared at only one step operation.
    In 48 cases, brain tumors was confirmed in 19 cases, non-tumorous intracranial diseases was 7 cases, normal and unconfirmed was 22 cases.
    The ratio of detection was seemed not to differ fromer reports.
    As the side effect cannot be recognized at any case and the complicated operation of fromer 113mIn-DTPA preparation is not needed, this kit is a very convenience preparation method in routine test.
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  • Shigeo KOBAYASHI, Kikuo YATABE
    1971 Volume 20 Issue 11 Pages 603-606
    Published: November 15, 1971
    Released: July 21, 2010
    JOURNALS FREE ACCESS
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  • Kenzo TAGUCHI, Taiji SCHIMIZU
    1971 Volume 20 Issue 11 Pages 607-609
    Published: November 15, 1971
    Released: July 21, 2010
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  • Osamu YURA
    1971 Volume 20 Issue 11 Pages 610-611
    Published: November 15, 1971
    Released: July 21, 2010
    JOURNALS FREE ACCESS
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  • Vincent P. GUINN
    1971 Volume 20 Issue 11 Pages 612-619
    Published: November 15, 1971
    Released: July 21, 2010
    JOURNALS FREE ACCESS
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  • Minoru OKADA
    1971 Volume 20 Issue 11 Pages 620-630
    Published: November 15, 1971
    Released: July 21, 2010
    JOURNALS FREE ACCESS
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  • Tomotaro SATO
    1971 Volume 20 Issue 11 Pages 631-637
    Published: November 15, 1971
    Released: July 21, 2010
    JOURNALS FREE ACCESS
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  • Hidero UEYANAGI
    1971 Volume 20 Issue 11 Pages 638-647
    Published: November 15, 1971
    Released: July 21, 2010
    JOURNALS FREE ACCESS
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  • 1971 Volume 20 Issue 11 Pages A1195-A748
    Published: November 15, 1971
    Released: July 21, 2010
    JOURNALS FREE ACCESS
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