RADIOISOTOPES
Online ISSN : 1884-4111
Print ISSN : 0033-8303
ISSN-L : 0033-8303
Search
Advanced search
OR
Browse
Search
Volume 57, Issue 10
Displaying 1-3 of 3 articles from this issue
Show all abstracts
    • |<
    • <
    • 1
    • >
    • >|
Articles
  • Development of a Miniaturized Watch-type Dosimeter Using a Silicon Printed-circuit Board
    Takeshi ISHIKURA, Tsuyoshi SAKAMAKI, Iwao MATSUMOTO, Kei AOYAMA, Takas ...
    Article type: Articles
    2008 Volume 57 Issue 10 Pages 597-603
    Published: 2008
    Released on J-STAGE: October 29, 2008
    DOIhttps://doi.org/10.3769/radioisotopes.57.597
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    The electrical personal dosimeter using a silicon semiconductor sensor has the advantage of real time response and alarm function, which can prevent unexpected over-exposure. We tried to develop a miniaturized watch-type dosimeter by incorporating the silicon semiconductor sensor on a silicon printed-circuit board. Thin film resistors, capacitors and wiring patterns are formed on a downsized printed-circuit board. Electronic parts including transistors are mounted by soldering on the silicon printed-circuit board. The dosimeter is further miniaturized by downsizing the amplifier circuit, the semiconductor radiation sensor, the power supply circuit, setting parts and alarm part. The performance of the developed dosimeter was evaluated with respect to the gamma-ray spectra, angular dependence and linearity to dose equivalent rate, and it was confirmed that this dosimeter has the performance equivalent to a commercially available electrical personal dosimeter.
    View full abstract
    Download PDF (1200K)
  • Shielding Calculation of Bremsstrahlung Induced by Beta-rays from Reference Radioisotopes
    Shigeo FUKANO
    Article type: Articles
    2008 Volume 57 Issue 10 Pages 605-616
    Published: 2008
    Released on J-STAGE: October 29, 2008
    DOIhttps://doi.org/10.3769/radioisotopes.57.605
    JOURNAL FREE ACCESS
    Supplementary material
    Show abstractHide abstract
    The effective dose constants due to the bremsstrahlung from beta-rays of 13 important radionuclides (3H, 63Ni, 14C, 35S, 147Pm, 33P, 45Ca, 90Sr, 85Kr, 36Cl, 89Sr, 32P, 90Y) were calculated. The targets were raw-materials with the atomic numbers 1 through 82, water, concrete, acrylic fiber, and four kinds of glasses (lead glass, Pyrex glass, potash glass, soda-lime glass). In addition, the effective dose attenuation data of these bremsstrahlung for water, concrete, aluminum, iron, tungsten and lead were obtained.
    View full abstract
    Download PDF (1192K)
Materials(Data)
  • A Summary Report on the 29th Quality Control Survey for Immunoassays in Japan, 2007
    Subcommittee for Radioisotope in vitro Test, Medical Science and Pharm ...
    Article type: Materials(Data)
    2008 Volume 57 Issue 10 Pages 617-668
    Published: 2008
    Released on J-STAGE: October 29, 2008
    DOIhttps://doi.org/10.3769/radioisotopes.57.617
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    The results of the 29th nationwide control survey for immunoassay were reported. A total of 34 analytes for hormones, tumor markers and pharmaceutical drugs were investigated in participated 114 facilities. The four kinds of commercial control sera were used as survey materials, and simultaneously pooled human sera were also investigated for comparing with results using the control sera in selected 22 facilities. Minimum satisfactory results in intra-kit as well as inter-kit variations were obtained. Intra-kit variation less than 10% was achieved in 76% of analytes. When the pooled sera were used, apparent improvement of variation was observed in some analytes. These results indicate that the conventional survey results using the commercial control sera might need to be reevaluated at least in some analytes.
    View full abstract
    Download PDF (1627K)
    • |<
    • <
    • 1
    • >
    • >|
feedback
 Top