RADIOISOTOPES
Online ISSN : 1884-4111
Print ISSN : 0033-8303
ISSN-L : 0033-8303
Volume 36 , Issue 11
Showing 1-13 articles out of 13 articles from the selected issue
  • Yasuhito IGARASHI, Atsushi YAMAKAWA, Nagao IKEDA
    1987 Volume 36 Issue 11 Pages 563-567
    Published: November 15, 1987
    Released: September 07, 2010
    JOURNALS FREE ACCESS
    Urannium and calcium contents in human bones (skull, rib and femur) were determined by the fission track method and the inductively coupled plasma-atomic emission spectroscopic method (ICP-AES), respectively. The U/Ca concentrtion ratio in the bones was found to decrease in the order of rib>femur>skull, which is in accordance with the decreasing order of the mean annual replacement percentage of bone components. Several femur bones were cut into several longitudinal segmenrs, and uranium and calcium contents in each segment were determined. Among these, the U/Ca ratio in the epiphysis was higher than those in the diaphysis.
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  • Hideo MURAHASHI, Hiromi WAKAO, Hiroyuki IKUTA, Takako KOGAWA, Yoshinor ...
    1987 Volume 36 Issue 11 Pages 568-574
    Published: November 15, 1987
    Released: September 07, 2010
    JOURNALS FREE ACCESS
    It is well known that the mechanism of 67Ga accumulation into tumor cells is mediated with transf errin receptor as well as iron.
    The present study was designed to explore the difference between the mechanism of gallium accumulation and that of iron by using mouse leukemic cell line L5178Y.
    When monensin which inhibit the recycle of transferrin receptor was added to the incubated system, accumulation of 59Fe and 67Ga was clearly diminished compared with that of control. However, inhibition of 59Fe accumulation was more remarkable than that of 67Ga. Furthermore, monensin has a action of Na+ ionophore which decrease Na+ gradient between the inside and the outside of the plasma membrane. Following administration of monensin, 67Ga accumulation was diminished according to the loss of the Na+ gradient.
    On the other hand, following administration of valinomycin, 67Ga accumulation was not affected by the loss of the K+ gradient.
    From these results, it was suggested that the mechanism of 67Ga accumulation into tumor cells differed from that of 59Fe and transferrin receptor and Na+ gradient of tumor cells played an important role on 67Ga accumulation into tumor cells.
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  • Shigeo UCHIDA, Misako SUMIYA, Setsuko YOKOSUKA, Yoichiro OHMOMO
    1987 Volume 36 Issue 11 Pages 575-580
    Published: November 15, 1987
    Released: September 07, 2010
    JOURNALS FREE ACCESS
    Cesium-137 and strontium-90 are important radionuclides for dose assessment in accidental and/or routine release of radionuclides from nuclear facilities including ground disposal facilities to the environments. Because both nuclides have relatively long half lives (30 years and 28.8 years, respectively) and relatively higher quantity in the fission product.
    This study was carried out to estimate the amount of these nuclides transferred from culture solution to crop plants, particularly the edible parts of the plants. Rice plant (Oryza sativa L, cv. koshihikari), spinach (Spinacea oleracea L.), soybeans (Glycine max Merr.), and the other four kinds of crop plant were transplanted in culture solution containing 137CsCl and 85SrCl2, and the transfer rates of 137Cs and 85Sr were obtained. The transfer rate is defined by the following equation; Transfer rate=the activity of plant sample/day/the mean activity of culture solution
    The differences by the nuclides, by the organs of each plant and by plant species were discussed in this paper. And temporal critical crop plants for 137Cs and 90Sr were also selected.
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  • Minoru TAKADA, Asaya KOBASHI, Jun SATO, Nobufusa SAITO
    1987 Volume 36 Issue 11 Pages 581-583
    Published: November 15, 1987
    Released: September 07, 2010
    JOURNALS FREE ACCESS
    The concentrations of 238U, 234U, 226Ra and 210Pb in 4 crystalline apatlte samples from different localities were determined by means of nondestraetive γ-ray spectrometry and α-ray spectrometry. The data obtained indicate that 234U and 226Ra are in radioactive equilibrium with the parent 238U The 210Pb/238U activity ratios are clearly smaller than unity. Release of 222Rn from apatites after crystallization was shown to be responsible for the 238U-210Pb disequilibrium.
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  • Masakazu YASUI, Hikaru SETO, Syuichi TONAMI, Tetsuya KAMEI, Masao KAKI ...
    1987 Volume 36 Issue 11 Pages 584-586
    Published: November 15, 1987
    Released: September 07, 2010
    JOURNALS FREE ACCESS
    Transmission scanning was proposed to be a useful adjunct to conventional emission scanning for accurately keying radionuclide deposition to radiographic anatomy. After introduction of a scintillation camera, transmission whole-body scintigraphy using a flood source has been performed in a patient with differentiated thyroid carcinoma. In recent immunoscintigraphy with radiolabeled monoclonal anti-tumor antibodies has become popular and transmission whole-body scintigraphy have been re-evaluated to make diagnosis for laterality of metastases.
    However, there are several problems to handle a flood source for preparation and shielding. We developed a special line source for transmission whole-body scintigraphy. The lane source is composed of a plastic tube (inner diameter: 3 mm) with three-way stop in a U-shaped metal.
    There are several advantages to use this line source as compared to a flood one; (1) a small volume of radioactive solution (less than 5 ml), (2) easy preparation and setting, and (3) less radiation. Moreover good quality of transmission image is obtained using this line source.
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  • Akio KOMATANI, Yukio SUGAI, Koichi YAMAGUCHI
    1987 Volume 36 Issue 11 Pages 587-589
    Published: November 15, 1987
    Released: September 07, 2010
    JOURNALS FREE ACCESS
    As a new parametric image of cerebral lesions, a map of the ratio between regional cerebral blood flow (rCBF) and the 2nd image of a series of dynamic images was proposed and tested.
    Three classes (poor, mild and well) were defined based on the degree of coupling between the rCBF and the new parametric image of the affected lesion. In 16 patients with cerebral infarction, those in the acute stage (within 1 week after onset) were found to belong to the poor coupling group, and the subacute group (1 to 4 weeks) showed mild coupling. In the chronic group (over 4 weeks), well coupling was observed. All patients of TIA fell into the mild coupling group. In a stimulation study with 5% CO2 mixed air, all of the well or mild-coupled lesions changed to uncoupled. These clinical findings demonstrate the characteristics of the new proposed image.
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  • Masato YAMASHITA, Hiroshi YAMAGISHI, Mitsuoki HASHIBA, Mihoko NAKATA, ...
    1987 Volume 36 Issue 11 Pages 590-593
    Published: November 15, 1987
    Released: September 07, 2010
    JOURNALS FREE ACCESS
    We developed an automatic kidney detection procedure designed to do away with extraneous margins such as the liver or spleen while leaving the kidney margins intact using Laplacian operations and concurrence calculations. We evaluated the delectability of kidneys using our procedures and found that the renal margins were successfully detected in 84 cases of 100 subjects (84%) including 176 kidneys out of a total of 198 kidneys (89%) . It was shown that as the renal function decreased the detectability of the renal margin decreased. In eight cases (16 kidneys) out of 9 patients who later resultantly received hemodialysis even manual settings of the renal ROI were very difficult. After excluding these 8 cases the detectability was 92% for all the cases and 95% for the kidneys. It was our conclusion that this method is sufficient for clinical application.
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  • Hirofumi AIBATA, Kazutami TORIZUMI, Takashi OKADA, Shigeyuki KIJI, Ryu ...
    1987 Volume 36 Issue 11 Pages 594-596
    Published: November 15, 1987
    Released: September 07, 2010
    JOURNALS FREE ACCESS
    In order to evaluate the gastric emptying and postprandial mixing of bile with food, the scintigraphies of hepatobiliary and gastrointestinal tracts by using three different kinds of radioisotopes were performed simultaneously (99mTe-E·HIDA for hepatobiliary scintigraphy, 111In-DTPA containing orange juice and 131I-albumin containing scrambled egg for gastrointestinal scintigraphy) . This method was available for observation of gastric emptying of liquid and solid foods and also examination of the mixing effect of bile and food quantitatively.
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  • Toshio KAJI, Kenji UTSUNOMIYA, Shinji SUGIHARA, Noriyuki MOMOSHIMA, Su ...
    1987 Volume 36 Issue 11 Pages 597-600
    Published: November 15, 1987
    Released: September 07, 2010
    JOURNALS FREE ACCESS
    Activity measurements of 3H and 14C in several environmental samples around the incinerator for radioactive liquid scintillator waste at the Radioisotope Center, Kyushu University were carried out to estimate their levels. It was indicated that 3H and 14C concentrations in the atmosphere at 1 m from the outlet were about 0.2% of those estimated at the outlet, respectively. At 6 m away from the outlet, 3H concentration decreased to about one twentieth of that at 1 m and 14C concentration to background level. For soils and plants, 14C concentrations showed negligibly low values. The existence of these nuclides in particle form was not confirmed.
    It is considered that the result of the higher 3H concentrations as compared to 14C concentrations reflects not only the difference of the waste amounts of their nuclides, but also the discharge of 3H as moisture as well as water vapor.
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  • Atsushi TATARA, Yoshu YOSHIBA, Hikoyuki YAMAGUCHI
    1987 Volume 36 Issue 11 Pages 601-602
    Published: November 15, 1987
    Released: July 21, 2010
    JOURNALS FREE ACCESS
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  • Takeo KOYAMA
    1987 Volume 36 Issue 11 Pages 603-611
    Published: November 15, 1987
    Released: July 21, 2010
    JOURNALS FREE ACCESS
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  • Hiroyuki SETO, Isao MIYAZAKI
    1987 Volume 36 Issue 11 Pages 612-622
    Published: November 15, 1987
    Released: July 21, 2010
    JOURNALS FREE ACCESS
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  • 1987 Volume 36 Issue 11 Pages A81P-A114M
    Published: November 15, 1987
    Released: July 21, 2010
    JOURNALS FREE ACCESS
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