Dose-response characteristics of a ferrous-sulphate-doped gelatin system for determining radiation absorbed dose distributions by magnetic resonance imaging (Fe MRI).
Dose-response characteristics of a ferrous-sulphate-doped gelatin system for determining radiation absorbed dose distributions by magnetic resonance imaging (Fe MRI).
复制标题
硫酸亚铁掺杂明胶系统的剂量响应特性,用于通过磁共振成像 (Fe MRI) 确定辐射吸收剂量分布。
DOI:
10.1088/0031-9155/36/8/007
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发表时间:
1991
影响因子:
3.5
通讯作者:
Boyer,AL
中科院分区:
文献类型:
--
作者:
Hazle,JD;Hefner,L;Nyerick,CE;Wilson,L;Boyer,AL
The nuclear magnetic resonance (NMR) longitudinal relaxation rate R 1 dose-response characteristics of a ferrous-sulphate-doped chemical dosimeter system (Fe MRI) immobilized in a gelatin matrix were explored. Samples containing various concentrations of the FeSO 4 dosimeter were irradiated to absorbed doses of 0-150 Gy. R 1 relaxation rates were determined by imaging the samples at a field strength of 1.5 T (1 H Lamor frequency of 63.8 MHz). The response of the system was found to be approximately linear up to doses of 50 Gy for all FeSO 4 concentrations studied (0.1-2.0 mM). Changing concentrations in the range of 0.1-0.5 mM affected both the slope and intercept of the dose-response curve. For concentrations of 0.5-2.0 mM, the slope of the dose-response curves remained constant at approximately 0.0423 s-1 Gy-1 in the dose range of 0-50 Gy. However, the intercept of the curve continued to increase in that region, as expected, because of the additional paramagnetic ions. The reproducibility of the absorbed dose estimates for measurements made over a 22 cm field of view was found to be 5% in the range of 20-50 Gy (an uncertainty of 0.81 Gy on average), decreasing to approximately 10% in the dose range of 5-10 Gy.
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DOI:
--
发表时间:
1990
期刊:
影响因子:
--
作者:
M. J. Day
通讯作者:
M. J. Day
影响因子:
3.5
作者:
R J Schulz;A F deGuzman;D B Nguyen;J C Gore
通讯作者:
R J Schulz;A F deGuzman;D B Nguyen;J C Gore
影响因子:
3.5
作者:
Lars E. Olsson;J. Petersson;L. Ahlgren;S. Mattsson
通讯作者:
S. Mattsson
DOI:
--
发表时间:
1963
期刊:
影响因子:
--
作者:
J. Geisselsoder;M. J. Kingkade;J. S. Laughlin
通讯作者:
J. S. Laughlin
DOI:
--
发表时间:
1990
期刊:
Medical Physics (Lancaster)
影响因子:
--
作者:
M. Podgorsak;L. Schreiner;E. Podgoršak
通讯作者:
E. Podgoršak