Dose distribution of 125 I source in the liver tissues
AN Menglin
QIANG Yonggang
LIAO Yonghua
XIANG Xiang
Abstract：Objective To investigate the dose distribution characteristics of radioactive 125 I particle source in liver tis-sues and provide a reference for the brachytherapy dose calculations.Methods We applied the method of thermolumines-cence dosimetry and used"M"glyph space to implant LiF ( Mg, Cu, P) .The relationships between the exposure dose ( X) of the thermoluminescence dose element and the measured data ( Y) were analyzed.Then, we measured and calculat-ed the radiation absorbed dose changes and field distribution of 125 I radioactive particle sources in the liver tissues of the ax-ial, radial and the four-point directions of the line.Results The reading of thermoluminescent dosimeter ( Y) had linear relationship with the exposure dose (X).The linear regression equation was Y=0.134 2X-0.014 7 (R2 =0.999, P<0.01).With the increase of the distance from the source, the dose of 125I particle source in axial, radial and middle line showed a rapid decreasing tendency.According to different angles, the absorbed dose of equidistance locus were different, the radial dose >dose in middle line direction >the axial dose.Conclusion The dose distribution of 125 I particle source in liver tissues was uneven, and the dose distribution is similar to the"apple"shape with dose sag area and dose bump area distribution characteristics.
Keywords：125 I particle sourcethermoluminescent dosimeterliver tissuesdose and field distribution
Publication Date：2016-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 9-12 )