Objective： The aim of the work was to compare the dosimetric results that were obtained by using two treatment planning systems （TPS） Siemens KonRad version 2.2.23, Elekta XiO version 4.4 to perform a simultaneous ...Objective： The aim of the work was to compare the dosimetric results that were obtained by using two treatment planning systems （TPS） Siemens KonRad version 2.2.23, Elekta XiO version 4.4 to perform a simultaneous integrated boost （SIB） for head and neck and central nervous system （CNS） cases in paediatric patients. Methods： The CT scan data for five paediatric patients, with head and neck and CNS tumors, were transferred into both of the TPSs. Clinical step-and-shoot intensity-modulated radiotherapy （IMRT） treatment plans were designed using 6 MV photon beam for delivery on a Siemens Oncor Accelerator with multileaf collimator MLC （82 leaf）. Plans were optimized to achieve the same clinical objectives using the same beam energy, number and direction of beams. The analysis was based on isodose distributions, the dose volume histogram （DVH） for planning target volume （PTV） and the relevant organs at risk （OARs） as well as volume receiving 2 Gy and 5 Gy, also total number of segments, MU/segment, and the number of MU/cGy had been investigated. Treatment delivery time and conformation number were two other parameters in this study. Results： The segmentation using KonRad was more efficient, resulting in fewer segments （reduction between 13.2% and 48.3%）, fewer M Us （reduction between 10.7% and 33%） and that reflected on treatment delivery times to be shorter by up to 8 rain or 46%. In most of the cases KonRad had the highest volume receiving in excess of 2 and 5 Gy, and XiO showed the lowest. Also KonRad achieved slightly better conformality （0.76 ± 0.054） than XiO （0.73 ± 0.05） while XiO presented a higher modulation factor value （3.3 MU/cGy） than KonRad （2.4 MU/cGy）. Conclusion： The KonRad treatment planning system was found to be superior to the XiO treatment planning system. This is true for the possible increase of radiation-induced secondary malignancies as well as for the local control.展开更多
目的观察不可手术的中心型非小细胞肺癌患者应用全程局部同步推量适形放射治疗的不良反应及临床疗效。方法收集2007年12月至2013年7月在河北医科大学第四医院收治的不可手术的中心型非小细胞肺癌患者44例,均经组织学或细胞学证实,采用SI...目的观察不可手术的中心型非小细胞肺癌患者应用全程局部同步推量适形放射治疗的不良反应及临床疗效。方法收集2007年12月至2013年7月在河北医科大学第四医院收治的不可手术的中心型非小细胞肺癌患者44例,均经组织学或细胞学证实,采用SIB-CR技术制定放疗计划,PTV处方剂量5 040 c Gy/28次(180 c Gy/次),肿瘤局部处方剂量6 440 c Gy/28次(单次分割230 c Gy/次),1次/日,5次/周,全程放疗时间5.5周。观察不良反应及临床疗效。结果放疗结束疗效显示:总有效率为97.70%(43/44)。全组病例1、2、3、5年生存率分别为70.9%、44.8%、31.0%、18.6%。1、2、3、5年局部控制率分别为93.8%、63.9%、58.1%、58.1%。急性放射性肺炎和放射性食管炎的发生率分别为29.6%和25%。骨髓抑制发生率为43.2%(19/44)。结论全程局部同步推量适形放射治疗不可手术的中心型非小细胞肺癌,临床有效率高,患者耐受性好。长期生存和晚期并发症有待于进一步观察。展开更多
文摘Objective： The aim of the work was to compare the dosimetric results that were obtained by using two treatment planning systems （TPS） Siemens KonRad version 2.2.23, Elekta XiO version 4.4 to perform a simultaneous integrated boost （SIB） for head and neck and central nervous system （CNS） cases in paediatric patients. Methods： The CT scan data for five paediatric patients, with head and neck and CNS tumors, were transferred into both of the TPSs. Clinical step-and-shoot intensity-modulated radiotherapy （IMRT） treatment plans were designed using 6 MV photon beam for delivery on a Siemens Oncor Accelerator with multileaf collimator MLC （82 leaf）. Plans were optimized to achieve the same clinical objectives using the same beam energy, number and direction of beams. The analysis was based on isodose distributions, the dose volume histogram （DVH） for planning target volume （PTV） and the relevant organs at risk （OARs） as well as volume receiving 2 Gy and 5 Gy, also total number of segments, MU/segment, and the number of MU/cGy had been investigated. Treatment delivery time and conformation number were two other parameters in this study. Results： The segmentation using KonRad was more efficient, resulting in fewer segments （reduction between 13.2% and 48.3%）, fewer M Us （reduction between 10.7% and 33%） and that reflected on treatment delivery times to be shorter by up to 8 rain or 46%. In most of the cases KonRad had the highest volume receiving in excess of 2 and 5 Gy, and XiO showed the lowest. Also KonRad achieved slightly better conformality （0.76 ± 0.054） than XiO （0.73 ± 0.05） while XiO presented a higher modulation factor value （3.3 MU/cGy） than KonRad （2.4 MU/cGy）. Conclusion： The KonRad treatment planning system was found to be superior to the XiO treatment planning system. This is true for the possible increase of radiation-induced secondary malignancies as well as for the local control.
文摘目的观察不可手术的中心型非小细胞肺癌患者应用全程局部同步推量适形放射治疗的不良反应及临床疗效。方法收集2007年12月至2013年7月在河北医科大学第四医院收治的不可手术的中心型非小细胞肺癌患者44例,均经组织学或细胞学证实,采用SIB-CR技术制定放疗计划,PTV处方剂量5 040 c Gy/28次(180 c Gy/次),肿瘤局部处方剂量6 440 c Gy/28次(单次分割230 c Gy/次),1次/日,5次/周,全程放疗时间5.5周。观察不良反应及临床疗效。结果放疗结束疗效显示:总有效率为97.70%(43/44)。全组病例1、2、3、5年生存率分别为70.9%、44.8%、31.0%、18.6%。1、2、3、5年局部控制率分别为93.8%、63.9%、58.1%、58.1%。急性放射性肺炎和放射性食管炎的发生率分别为29.6%和25%。骨髓抑制发生率为43.2%(19/44)。结论全程局部同步推量适形放射治疗不可手术的中心型非小细胞肺癌,临床有效率高,患者耐受性好。长期生存和晚期并发症有待于进一步观察。
