摘要
目的比较3种体位固定术在盆腔肿瘤患者放疗中的摆位误差,探讨盆腔肿瘤患者放疗的理想体位,为临床提供参考。方法选取2013-09-01-2014-03-31山东省肿瘤医院放疗科收治的需要进行精确放疗的盆腔肿瘤患者45例,根据固定技术不同分为真空垫、低温热塑体膜和碳纤维腹板3组,每组各15例,每组患者均行放疗前的锥形束CT(cone beam computed tomography,CBCT)扫描,进行CBCT与计划CT图像在线配准,获取摆位误差,收集数据,采用SPSS19.0软件进行统计分析。结果真空垫组患者摆位误差依次为X(2.9±1.64)mm,Y(3.1±1.73)mm,Z(4.5±1.60)mm;热塑体膜组依次为X(3.4±2.10)mm,Y(3.3±2.32)mm,Z(1.8±1.08)mm;碳纤维腹板组依次为X(2.3±1.33)mm,Y(1.6±0.83)mm,Z(2.1±1.30)mm。经过单项方差分析和LSD方法多重比较发现,X方向,3组比较差异均无统计学意义,P值均>0.05;Y方向,真空垫组和低温热塑体膜组差异无统计学意义,但两者均大于碳纤维腹板组,P值均<0.05;Z方向,低温热塑体膜组和碳纤维腹板组差异无统计学意义,但两者均小于真空垫组,P值均<0.05。结论 3种体位固定方式在盆腔肿瘤的放疗中尽管都能起到一定的固定作用,但从摆位误差结果分析来看,碳纤维腹板的固定效果最好,低温热塑体膜次之。
OBJECTIVE To compare the setup errors of the three positioning methods in tumor of pelvis radiotherapy and research the ideal position for pelvic tumor patients in radiotherapy,to provide certain reference value for clinicians.METHODS Totally 45 cases of pelvic tumor patients who need precise radiotherapy in Shandong Cancer Hospital radiotherapy department from 2013-09-01 to 2014-03-31 were divided into three groups in a fixed way according to the different fixation techniques,agroup of 15 cases with negative pressure vacuum bags,another group of 15 with low-temperature thermoplastic sheets,the other group of 15 cases with carbon fiber belly boards.Patients in each group were performed CBCT scanning before radiotherapy.The CBCT and planning CT images were matching online,and then the positioning errors were measured and analyzed.Statistical analysis was performed using SPSS 19 software.RESULTS The set-up errors（mm）of the vacuum bag,namely the systemic±random errors were X（2.9±1.64）,Y（3.1±1.73）,Z（4.5±1.60）.Thermoplastic sheet group were X（3.4±2.10）,Y（3.3±2.32）,Z（1.8±1.08）.Belly board group were X（2.3±1.33）,Y（1.6±0.83）,Z（2.1±1.30）.The single variance analysis and LSD multiple comparison method showed,X：3groups had no significant difference;Y：There was no significant difference between the vacuum bag and sheet,but the two were greater than the belly board（P〈0.05）;Z：There was no significant difference between sheet and belly board,but two of them were less than vacuum bag（P〈0.05）.CONCLUSIONS The three positioning methods have advantages and disadvantages respectively in tumor of pelvis radiotherapy.But from the setup errors of the results,the fixed effect of carbon fiber belly board is the best,and thermoplastic sheet is the second.
出处
《中华肿瘤防治杂志》
CAS
北大核心
2015年第12期974-977,983,共5页
Chinese Journal of Cancer Prevention and Treatment
关键词
盆腔肿瘤
放射治疗
真空垫
热塑体膜
碳纤维腹板
pelvis neoplasms
radiotherapy
negative pressure vacuum bag
thermoplastic sheet
carbon fiber belly board
