Online ISSN : 1884-4111
Print ISSN : 0033-8303
ISSN-L : 0033-8303
Volume 60 , Issue 8
Showing 1-8 articles out of 8 articles from the selected issue
  • Keitaro TANOI, Takayuki SAITO, Naoko IWATA, Yoshimi OHMAE, Atsushi HIR ...
    2011 Volume 60 Issue 8 Pages 299-304
    Published: 2011
    Released: August 29, 2011
    We present the preparation of 28Mg to study Mg uptake manner by rice root. Since there is no convenient Mg tracer, we prepared 28Mg from a pure Al target irradiated by an α-particle beam. As a result, approximately 1MBq of carrier-free and salt-free 28Mg was purified. Mg uptake velocity of rice was analyzed using seedlings at the third-, fourth- and seventh-leaf stages. Prepared 28Mg was applied to the rice root for a short term (15 to 30min) with low (0.1mM) or high (5.0mM) concentration of Mg in a solution. After sample was washed with cold water, 28Mg distribution was detected by an imaging plate. From the analysis, the Mg uptake rate of the root in the 5.0mM Mg was approximately 6 to 7-fold higher than that in the 0.1mM. To confirm the result more in detail, the uptake analysis was also performed with various concentrations of Mg. The results indicate that Mg uptake systems concentrate Mg when the Mg concentration in the external solution is low, which suggests the high contribution of active Mg transport system in root.
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  • Subcommittee for Radionuclide Imaging and Nuclear Medicine Technology ...
    2011 Volume 60 Issue 8 Pages 339-362
    Published: 2011
    Released: August 29, 2011
    A questionnaire survey on safety of nuclear medicine studies was conducted under the subcommittee for radionuclide imaging and nuclear medicine technology of Japan Radioisotope Association to promote patient safety. Questionnaires sheets were sent to 1288 hospitals and 14 clinical laboratories in Japan with valid responses from 1016 facilities (78.0%).
    The number of accidents and incidents decreased to 53.3% of those of 2001, due mainly to the decrease in the number of incidents. Incidents due to errors in handling of the imaging apparatus was markedly decreased compared with the last survey. Accidents and incidents due to bump/contact by cameras decreased markedly. About a half of the accidents was attributable to incorrect handling of the patients. The number of system malfunction and break of cameras decreased to 39.2% of those in 2004. The results may indicate that 70% of incidents and accidents is prevented by concise explanation, meticulous care of patients and re-education of safety precautions to workers in nuclear medicine facilities. Improvement in the fixation device of patients and preparation of safety manual were regarded as important for promoting safety in nuclear medicine practice.
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