RADIOISOTOPES
Online ISSN : 1884-4111
Print ISSN : 0033-8303
ISSN-L : 0033-8303
Volume 28 , Issue 9
Showing 1-14 articles out of 14 articles from the selected issue
  • Shuzo UEHARA, Tetsuji CHO, Atsushi YOSHIMURA, Haruma YOSHINAGA, Keisuk ...
    1979 Volume 28 Issue 9 Pages 537-541
    Published: September 15, 1979
    Released: September 07, 2010
    JOURNALS FREE ACCESS
    Microdosimetry of in-flight π- beams was performed at the Ti channel of National Laboratory for High Energy Physics (KEK), Tsukuba, Japan. Distributions of lineal energy (y) in-flight π- beams having six momentum values from 120 Me V/c to 1000 Me V/c were measured with an LET counter which simulates 2μm sphere of soft tissue filled with the methane base tissue equivalent gas. Frequency spectra were obtained in the range of 1.6<y<430 keV/pm. Fractional dose y·d (y), cumulative dose D (y), and mean lineal energy were calculated from these spectra; then momentum dependences were investigated. These absolute values have little physical application because of the lack of data for y<1.6 keV/rim. However, the general trends of y distribution in momentum dependence were found, qualitatively. As the momentum becomes smaller, the rate of high y component in the dose increased.
    Download PDF (542K)
  • Hironobu KAWABATA, Tadashi YANAGI, Teruhiko TABUCHI, Mutsuaki SHINAGAW ...
    1979 Volume 28 Issue 9 Pages 542-545
    Published: September 15, 1979
    Released: September 07, 2010
    JOURNALS FREE ACCESS
    Some fundamental studies on removal of tritium from gaseous streams by a small column of copper oxide were carried out. An about 10 cm length of column packed with 100 g of copper oxide was examined on the conversion ratios of hydrogen and tritium into water. The experiment with hydrogen o f 0.1 per cent in argon showed that the logarithmic plot of remaining ratio of hydrogen by passing through the column is proportional to the reciprocal of gas flow rate and to the length of oxide column. The oxide column was also used for treating tritium-bearing waste gas from an evacuating system of a D-T neutron generator. It was observed that at column temperatures lower than 450°C the conversion ratio of tritium in the waste gas into water is considerably smaller than that of hydrogen of 0.1 per cent in argon.
    Download PDF (432K)
  • Shyuji KOJIMA, Masami YAMAMOTO, Mitsue ODATE, Akiko KUBODERA
    1979 Volume 28 Issue 9 Pages 546-550
    Published: September 15, 1979
    Released: September 07, 2010
    JOURNALS FREE ACCESS
    In previous papers we reported that the earlier peak time (PT) in radiorespirometry during feeding with 3'-methyl-4- (dimethylamino) azobenzene (3'-Me-DAB) is due to activation of the hexose monophosphate (HMP) pathway together with hepatic cell proliferation reflecting the toxic effects of this carcinogen. In this study, we investigated the correlation between the results of radiorespirometry and the levels of enzyme activities of HMP pathway in regenera-ting rat liver in connection with hepatic cell proliferation.
    [3H] Thymidine incorporation into rat liver DNA and the activities of hexokinase (HK) and glucose-6-phosphate dehydrogenase (G-6-PD) reached a maximum at the 3rd day after partial hepatectomy. On radiorespirometry using [U-14C] glucose, the peak time (FT) was much earlier at the 2nd to 3rd day after partial hepatectomy. The peak height (PH) decre-ased to less than 1/2 of the initial level at the 2nd, but began to recover from the 3rd day. The yield value (YV) remained below the initial level for 4 days after the operation.
    Download PDF (511K)
  • Takami KAKUDA, Motoaki ONO, Kazuyoshi YAMASHITA, Hideaki ITO, Yumi SAW ...
    1979 Volume 28 Issue 9 Pages 551-557
    Published: September 15, 1979
    Released: September 07, 2010
    JOURNALS FREE ACCESS
    Using 99mTc-labeled macroaggregated albumin (99mTc-MAA), we made an examination of the cerebral blood flow distribution with various kinds of cerebrovascular diseases in 151 cases. The particle size of MAA used in this study ranged from 10 to 100 μm. Scan was performed after injection of 3 mGi of 99mTc-MAA into common carotid artery. No side effects were observed except for one case with headache.
    Distribution of 99mTc-MAA was found to be homogeneous in normal cerebral hemisphere but not in the lesion. Most lesion was shown as nonradioactive area. Meningioma with hy-pervascularity was represented as hot area. By this method cerebral infarct could be easily represented not only in main artery but also in such a very small artery as hardly detected by GAG. This method is therefore useful for detecting cerebral infarct, sequela of cerebral apoplexy, head injury and others.
    The dose of 99mTc-MAA used in this method is much lower compared with those of common brain scan, its excretion is speedy, and therefore internal radiation exposure is diminished.
    Download PDF (4172K)
  • Hidetoshi KOBAYASHI, Tsuneo SASAKI, Kohei SENDA, Hiroshi SAITO, Kazuhi ...
    1979 Volume 28 Issue 9 Pages 558-561
    Published: September 15, 1979
    Released: September 07, 2010
    JOURNALS FREE ACCESS
    The clinical usefulness of 67Ga-citrate whole body scanning is evaluated in 178 cases of the various diseases in a period of 1976-1978.
    The cases are 59 cases of thoracic lesions, 41 cases of head and neck lesions, 35 cases of abdominal, bone, and soft tissue lesions, and 43 cases of benign and malignant lymphoma.
    The clinical results and detectability of various known lesions are shown in tables 1, 2, 3 and 4.
    The detectability of unknown lesions of malignant lymphoma is shown in table 5.
    The study demonstrates the particular clinical values of 67Ga-citrate scan in detectability of unknown lesions to be in cases of malignant lymphoma.
    Download PDF (2445K)
  • Michimasa MATSUO, Keiji USHIO, Shoji NISHIYAMA, Michio KONO, Yoshiki T ...
    1979 Volume 28 Issue 9 Pages 562-567
    Published: September 15, 1979
    Released: September 07, 2010
    JOURNALS FREE ACCESS
    A routine examination of pulmonary hilar and mediastinal lymphoscintigraphy is tried in this study in order to visualize pulmonary hilar and mediastinal lymphnodes routinely.
    A method is as follows; 30-50μCi of 198Au-colloid (0.3-0.5 ml of total volume) is injected through the needle of flexible bronchofiberscope into the mucosal membrane or submucosal membrane of the bilateral B8 or B9bronchi.
    This method was applied to 11 cases of suspected pulmonary carcinoma and gave good results.
    In case of bronchitis, lung abscess and chronic pneumonia, carinal lymphnodes (which are expected to be as the inferior tracheo-bronchial lymphnodes) and one or more right mediastinal lymphnodes (which are expected to be as the right superior tracheo-bronchial or right paratra-cheal lymphnodes) were clearly visualized from 24 to 72 hours after the injection. In these cases the pulmonary hilar and mediastinal lymphnodes were expected to be intact on X-rays and CT findings.
    Among cases of pulmonary carcinoma or lymphangitis carcinomatosa, on the contrary, right mediastinal lymphnodes were not visualized in case with the right hilar lymphnodes involvement, and furthermore neither carinal nor right mediastinal lymphnodes were visualized in case with carinal lymphnodes involvements on X-rays, CT, operation or autopsy findings. From these results, the pulmonary hilar and mediastinal lymphoscintigraphy may give the useful information for the treatment planning, and follow up study of the cases of pulmonary and mediastinal malignant tumors.
    Download PDF (4248K)
  • Kazuhiko KOJIMA, Tatsunosuke HIRAKI, Kichiro KOSHIDA, Ryuichi MAEKAWA, ...
    1979 Volume 28 Issue 9 Pages 568-571
    Published: September 15, 1979
    Released: September 07, 2010
    JOURNALS FREE ACCESS
    Images are very useful to obtain diagnostic informations in medical fields. Also by super-imposing two or three images obtained from the same patient, various informations, for example a degree of overlapping and anatomical land mark, which can not be found in only one image, can be often found. In this paper characteristics of our trial color television system for the purpose of superimposing X-ray images and/or radionuclide images are described.
    This color television system; superimposing two images in each different color consists of two monochromatic vidicon cameras and 20 inches conventional color television in which only two simple video amplifier circuits are added. Signals from vidicon cameras are amplified about 40 dB and are directly applied to cathode terminals of color CRT in the television. This system is very simple and economical color displays, and enhance a degree of overlapping and displacement between images. As one of typical clinical applications, pancreas images were superimposed in color by this method. As a result, size and position of pancreas was en-hanced. Also X-ray image and radionuclide image were superimposed to find exactly the position of tumors. Furthermore this system was very useful for color display of multi-nuclides scintigraphy.
    Download PDF (1937K)
  • Yukio MORI, Toshiro NIWA, Kazumi TOYOSHI
    1979 Volume 28 Issue 9 Pages 572-574
    Published: September 15, 1979
    Released: July 21, 2010
    JOURNALS FREE ACCESS
    Download PDF (259K)
  • Atsuo NAGATA, Tatsuya MIYAMAE
    1979 Volume 28 Issue 9 Pages 575-577
    Published: September 15, 1979
    Released: July 21, 2010
    JOURNALS FREE ACCESS
    Download PDF (3888K)
  • Takeo HASEGAWA, Hiroshi HASHIBA, Kiyoshi AKAGI, Akitoshi KOBAYASHI, Ma ...
    1979 Volume 28 Issue 9 Pages 578-580
    Published: September 15, 1979
    Released: July 21, 2010
    JOURNALS FREE ACCESS
    Download PDF (301K)
  • Osamu SASAKI, Hiroshi SHIONOIRI, Yumiko IKEDA, Shigekazu SEKINE, Morim ...
    1979 Volume 28 Issue 9 Pages 581-583
    Published: September 15, 1979
    Released: July 21, 2010
    JOURNALS FREE ACCESS
    Download PDF (282K)
  • Yoneho TABATA, Seiichi TAGAWA, Yosuke KATSUMURA
    1979 Volume 28 Issue 9 Pages 584-593
    Published: September 15, 1979
    Released: July 21, 2010
    JOURNALS FREE ACCESS
    Download PDF (1424K)
  • Naotake MORIKAWA
    1979 Volume 28 Issue 9 Pages 594-601
    Published: September 15, 1979
    Released: July 21, 2010
    JOURNALS FREE ACCESS
    Download PDF (1034K)
  • 1979 Volume 28 Issue 9 Pages A1953-A16
    Published: September 15, 1979
    Released: July 21, 2010
    JOURNALS FREE ACCESS
    Download PDF (3880K)
feedback
Top