タイトル無し
スポンサーリンク
概要
- 論文の詳細を見る
<I>Detailed dose distributions within the tissue under the skin surface of a finger of personnel from handling a syringe filled with radioisotopes in nuclear medicine were obtained by numerical calculations. Entrance and exit dose rates at a finger phantom were compared with the experimental results of TLD measurements</I>.<BR><I>The size of cyrindrical radiation source is 12mm</I>φ×<I>9mm or 12mm</I>φ×<I>45mm and the wall thickness of plastic syringe is 1mm in thickness, so the volume of radioactive solution is lml or 5ml, each contains 1 mCi in activity. A water equivalent rectangular solid body of 30mm×20mm×100mm in size is assumed as a finger phantom, and actual measurements were performed with a MixDp phantom of the same size. A syringe containing radioisotope was placed directly on the phantom</I>.<BR><I>Absorbed dose rate of a point in the phantom was calculated by assuming that</I> γ-<I>rays from the summation of point sources of 1 mm</I><SUP>3</SUP> <I>in size attenuate by self-absorption within the source, absorption by the wall of syringe and tissue, and also by inverse square law. The scattered radiation, β-rays and bremsstrahlungs were neglected. Radionuclides used were</I> <SUP>99<I>m</I></SUP>Tc, <SUP>131</SUP>I, <SUP>203</SUP>Hg, <SUP>198</SUP>Au, and <SUP>59</SUP>Fe.<BR><I>It is possible to know the absorbed dose of the tissue at the vicinity of surface such as stratum corneum and sweat gland by dose distributions obtained in a cross section of a finger phantom about the five radionuclides</I>.<BR><I>Measured values of entrance dose rates were almost the same as that of calculated and exit dose rates in measured were higher than that in calculated from 10 to 30 per cent. The cause of this high value is considered due to scattered radiations from the phantom which is neglected in calculations</I>.
- 社団法人 日本アイソトープ協会の論文
社団法人 日本アイソトープ協会 | 論文
- Distortion of Pulse Height Spectra Due to Absorbers in the Measurement of Low-energy .BETA.-rays with a Silicon Detector.
- タイトル無し
- Estimation of Angular Distributions of the Low-Energy .BETA.-Ray Emission from a Sealed Source.
- Comparison of SPECT images with four kinds of 99nTc collimators.
- Cross Talks on to 201Tl- and 123I-Photopeak Windows with Simultaneous Administration of Them, Using of a Gamma Camera.