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Evaluation of in vivo detection properties of 22Na, 65Zn, 86Rb, 109Cd and 137Cs in plant tissues using real-time radioisotope imaging system.
Sugita, Ryohei; Kobayashi, Natsuko I; Hirose, Atsushi; Tanoi, Keitaro; Nakanishi, Tomoko M.
Afiliación
  • Sugita R; Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan.
Phys Med Biol ; 59(4): 837-51, 2014 Feb 21.
Article en En | MEDLINE | ID: mdl-24487508
In plant research, radioisotope imaging provides useful information about physiological activities in various tissues and elemental transport between plant organs. To expand the usage of imaging techniques, a new system was developed to visualize beta particles, x-rays and gamma-rays emitted from plant bodies. This real-time radioisotope imaging system (RRIS) visualizes radioactivity after conversion into light with a CsI(Tl) scintillator plate. Herein, the RRIS detection properties of the gamma-ray emitters (22)Na, (65)Zn, (86)Rb, (109)Cd and (137)Cs were evaluated in comparison with those of radioluminography (RLG) using an imaging plate. The lower quantitative detection limit (Bq mm(-2)) during a 15 min period ranged from 0.1 to 4, depending on the nuclide, similar to that of RLG. When the quantitative ability to detect radiation from various Arabidopsis tissues was analyzed, the quantitative capability in silique and the thick internode tended to be low. In an EGS5 simulation, beta particles were the greatest contributors to RRIS imaging of (22)Na, (86)Rb and (137)Cs, and low-energy x-rays contributed significantly to (65)Zn and (109)Cd detection. Thus, both self-absorption and air space between the sample and scintillator surface could impair quantitative RRIS imaging. Despite these issues, RRIS is suggested for quantitative time-course measurements of radionuclide motion within plants.
Asunto(s)

Texto completo: 1 Bases de datos: MEDLINE Asunto principal: Radioisótopos / Cintigrafía / Arabidopsis Tipo de estudio: Diagnostic_studies / Evaluation_studies Idioma: En Revista: Phys Med Biol Año: 2014 Tipo del documento: Article País de afiliación: Japón

Texto completo: 1 Bases de datos: MEDLINE Asunto principal: Radioisótopos / Cintigrafía / Arabidopsis Tipo de estudio: Diagnostic_studies / Evaluation_studies Idioma: En Revista: Phys Med Biol Año: 2014 Tipo del documento: Article País de afiliación: Japón