| Wang Jin,Yang Chunyong,Zhou Yuanyuan,et al.Dosimetric verification on intensity modulated radiotherapy in Jiangsu province[J].Chinese Journal of Radiological Medicine and Protection,2018,38(2):121-124 |
| Dosimetric verification on intensity modulated radiotherapy in Jiangsu province |
| Received:July 26, 2017 |
| DOI：10.3760/cma.j.issn.0254-5098.2018.02.008 |
| KeyWords:Intensity modulated radiotherapy Dose verification Thermoluminescent dosimeter Film |
| FundProject:IAEA资助项目（17821/CRP）；江苏省流行病学重点学科（ZDXK A2016008）；江苏省医学创新团队（CXTD A2017029） |
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| Abstract:: |
| Objective To explore the dosimetric verification method for absorbed dose and two-dimensional dose distribution generated through multi-leaf collimator in radiotherapy. Methods A total of 8 medical accelerators were selected in Jiangsu province. Under 6 MV X-rays with a 5 cm×5 cm field, the thermoluminescent dosimeter (TLD) and EBT3 radiochromic film (RCF) were used to audit the values calculated by treatment planning system (TPS). RCF was used to verify two-dimensional dose distribution under the 6 MV MLC beams for intensity modulated radiation therapy (IMRT). Results The relative dose deviation was from -1.4% to 6.8% for TLD and from -1.8% to 7.8% for RCF, with 7 accelerators meeting with the IAEA deviation requirement of ±5%. The passing rates of two-dimensional dose distribution were between 73.7% and 97.0%, with 7 accelerators greater than 90%. Conclusions TLD and RCF are feasible and suitable for large-scale verification of IMRT TPS absorbed dose and two-dimensional dose distribution. |
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