| SUN Fuyin,YUAN Shuyu,TAN Jian.Calculation of dose for β point and sphere sources in soft tissue[J].Chinese Journal of Radiological Medicine and Protection,1999,19(6):396-399 |
| Calculation of dose for β point and sphere sources in soft tissue |
| Received:February 08, 1999 Revised:May 06, 1999 |
| DOI： |
| KeyWords:Radionuclide Tumor therapy Dose calculation |
| FundProject:国家自然科学基金 |
| Author Name | Affiliation | | SUN Fuyin | Institute of Radiation Medicine, Chinese Academy of Medical Sciences, Tianjin 300192, China | | YUAN Shuyu | Institute of Radiation Medicine, Chinese Academy of Medical Sciences, Tianjin 300192, China | | TAN Jian | Hospital of Tianjin Medical University, Tianjin 300052, China | | 董峰 | Hospital of Tianjin Medical University, Tianjin 300052, China |
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| Abstract:: |
| Objective To compare the results of the distribution of dose rate calculated by three typical methods for point source and sphere source of β nuclide. Methods Calculating and comparing the distributions of dose rate from 32P β point and sphere sources in soft tissue calculated by the three methods published in references,[1],[2] and [３],respectively. Results For the point source of 3.7×107Bq(1mCi),the variations of the calculation results of the three formulas are within 10% if r<=0.35 g/cm2,r being the distance from source,and larger than 10% if r>0.35 g/cm2 .For the sphere source whose volume is 50 μl and activity is 3.7×107Bq(1 mCi),the variations are wthin 10% if z<=0.15 g/cm2,z being the distance from the surface of the sphere source to a point outside the sphere. Conclusion The agreement of the distributions of the dose rate calculated by the three methods mentioned above for point and sphere β source are good if the distances from point source or the surface of sphere source to the points observed are small,and poor if they are large. |
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