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1.
三维适形放射治疗局部复发鼻咽癌疗效观察 总被引:9,自引:2,他引:9
目的:观察三维适形放疗治疗局部复发鼻咽癌的近期疗效及放射损伤的发生率。方法:对42例局部复发鼻咽癌病例采用三维统计计划系统放射治疗计划,以剂量体积直方图评价和优化放射治疗计划,头部固定装置及多叶光栅技术实施适形放射治疗。计划靶区为临床所见肿瘤区外放7-10mm,计划靶区体积(PTV)中位体积为47.6cm^2(27.9-61.8cm^3),时间-剂量-分次采用:(5-5.5周)-(60-70Gy)-(24-28次),结果:三维适形放疗后,肿瘤局部控制率85.7%(36/42),2年生存率73.8%(31/42),放射损伤包括听力丧失7.1(3/42),张口困难35.7%(15/42),吞咽困难7.1%(3/42),慢性副鼻窦炎28.6%(12/42),脑神经损伤21.4%(9/42),结论:三维适形放疗治疗鼻咽放疗后鼻咽部局部复发有较好的近期疗效,而放射损伤较低,远期疗效尚待进一步观察。 相似文献
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局部复发鼻咽癌三维适形放疗近期疗效分析 总被引:1,自引:0,他引:1
目的 探讨三维适形放疗技术在局部复发鼻咽癌再程放疗中的应用。方法 2001年1月~2002年3月,采用常规放疗结合三维适形放疗治疗局部复发鼻咽癌24例,常规外照射40Gy/20次/4周后进行适形放疗,治疗剂量为28Gy/7次/15d。结果 随访期内肿瘤局部控制率91.7%(22/24)。3例病人死亡,其中2例死于远处转移,1例死于全身衰竭。5例伴有神经损伤。再程放疗所致急性放射反应轻。结论 鼻咽癌局部复发患者采用适形放疗取得满意的局部控制率,放射反应较轻.远期疗效及放射损伤尚待进一步观察。 相似文献
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目的观察适形放疗提高鼻咽癌局部复发治疗效果。方法1996.5—2003.10共收治86例鼻咽癌局部复发惠者。从1996.5—2000.10共收治52例,采用常规超分割放疗。DT60—66GY。2000.10—2003.10共收治34例,采用3-D超分割放疗DT59,8GY。结果3-D适形超分割放疗急性放射性粘膜炎,张口困难与常规超分割组相似,常规超分割放疗组出现21%(11/52)后组颅神经损伤,6%(2/52),3-D适形超分割放疗组无鼻咽粘膜坏死、视神经损伤。两组治疗有效率达90%。结论鼻咽癌局部复发采用超分割适形放疗取得满意近期疗效。常规超分割不宜采用。 相似文献
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三维适形放疗治疗局部复发性鼻咽癌疗效分析 总被引:1,自引:0,他引:1
柏建安 《山东医学高等专科学校学报》2007,29(4):273-275
目的观察三维适形放射治疗(3D-CRT)局部复发鼻咽癌的临床疗效及副作用。方法对26例局部复发鼻咽癌患者采用常规分割法,进行三维适形放射治疗,总剂量为60~70 Gy。结果2年生存率和无瘤生存率各为65.4%和53.8%,近期有效率为92.3%,且无明显副作用和合并症。结论三维适形放疗是治疗局部复发鼻咽癌的理想方法。 相似文献
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鼻咽癌调强适形放射治疗初步临床研究 总被引:3,自引:0,他引:3
目的:观察鼻咽癌调强适形放射治疗(IMRT)剂量分布及近期疗效.方法:16例病理确诊鼻咽癌初治患者,全身情况卡氏评分(KPS)≥80分,实施单纯根治性IMRT.采用同期加速推量放疗方法分割照射;处方剂量:鼻咽大体肿瘤体积(GTVnx)68~70Gy,颈部转移淋巴结(GTVnd)60~64Gy,临床靶体积1(CTVnx)60~62Gy,临床靶体积2(CTVnd)50~54Gy.利用剂量体积直方图评价靶体积和敏感器官受照剂量,用RTOG/EORTC标准评价急性放射损伤.结果:95%肿瘤灶靶区体积(Dv95GTV)剂量≥70Gy,95%临床靶区体积(Dv95CTV)剂量≥62Gy,中位均匀指数1.14;危险组织器官(OAR)平均剂量均值:脑干(25.5±2.6)Gy;脊髓(24.6±3.1)Gy;视交叉(43.3±1.8)Gy;视神经:(45.0±2.1)Gy(左),(39.0±2.21)Gy(右);腮腺:(39.53±1.6)Gy(健侧),(40.0±2.4)Gy(患侧);晶体:(6.1±0.6)Gy(左),(5.2±0.4)Gy(右);多数患者为1~2级急性反应;肿瘤完全消失占87.5%(14/16),总有效率100%.结论:调强适形放射治疗鼻咽癌可获得理想剂量分布,周围正常组织及敏感器官低剂量,放疗急性反应小,肿瘤消退理想. 相似文献
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目的 :评价立体定向放射治疗对鼻咽癌放疗后复发或残存病变的疗效。方法 :对 1 3例鼻咽癌放疗后复发或残存的患者进行了立体定向放射治疗。按 1 992年福州会议分期标准 , 期 0 % , 期 1 3% , 期 74.6% , 期 1 2 .4% ,外照射鼻咽部 DT66~ 80 Gy/7~ 8周 ,中位剂量 73Gy。对经足量外照射后 2~ 4周鼻咽部及咽旁间隙仍有肿瘤残存的或治疗半年后复发的各期鼻咽癌患者 ,且无远处转移者行立体定向放射治疗。设备采用 siemens6m V- X线直线加速器及 Brain LAB头部立体定向放射治疗系统。以 80 %等剂量曲线包绕靶区 ,周边单次剂量为 6~ 8Gy/次 ,3次 /周 ,共 3~ 4次完成。结果 :肿瘤完全消失占 77% ( 1 0 /1 3) ,明显缩小占 1 5 % ( 2 /1 3) ,缩小占 8% ( 1 /1 3)。结论 :立体定向放射治疗是治疗鼻咽癌放疗后复发或残存病变的有效方法 相似文献
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目的探讨三维适形放射治疗(3D CRT)肺部恶性肿瘤的近期疗效。方法对34例不能行手术切除的肺部恶性肿瘤患者采用三维适形放射治疗,观察近期疗效及生存率。结果肿瘤局部缓解率91.2%(31/34),1、2、3年生存率分别是88.2%(30/34)、35.3%(12/34)、26.5%(9/34)。结论3D CRT治疗肺部恶性肿瘤有较好的近期疗效,远期疗效尚待进一步观察。 相似文献
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食管癌三维适形放射治疗疗效观察 总被引:8,自引:0,他引:8
目的:探讨三维适形放射治疗(3DCRT)食管癌的近期疗效及放射治疗反应。方法:75例经病理证实的食管癌患者,分为常规放疗组(CF组)和三维适形放射治疗组(3DCRT组)。其中CF组40例,3DCRT组35例。CF组:2GY/次,5次/周,总剂量60-66Gy.7周内完成;3DCRT组:先常规放疗20GY,方法同CF组.然后改用三维适形放疗,2Gy/次,5次/周,总剂量60-66Gy,7周内完成。以放疗结束时临床症状及放疗结束后3个月的食管钡餐片作为评价依据。结果:CF组和3DCRT组的有效率(CR+PR)分别为85%、100N,两组比较差异有统计学意义(x2=3.85,P<0.05)。两组比较放射性食管炎发生率差异无统计学意义(x2=3.40,P>0.05),两组比较放射性气管炎发生率差异无统计学意义(X2=3.24,P>0.05)。结论:三维适形放射治疗能明显提高食管癌的近期疗效,放射性毒性可耐受。 相似文献
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^18FDG PET在鼻咽癌放疗后鼻咽部复发或残留再程三维适形放疗中的临床价值 总被引:1,自引:0,他引:1
目的 探讨^18氟-脱氧葡萄糖正电子发射断层扫描仪(^18FDG PET)在鼻咽癌放射治疗后鼻咽部复发或残留再程三维适形放射治疗(3DCRT)中的临床应用价值。方法 对36例首程放射治疗后鼻咽部复发或残留的鼻咽癌患者.采用CT模拟定位,结合^18FDG PET确定靶区范围,应用三维适形放射治疗,观察CT与^18FDG PET确定靶区大小的差异、疗效和并发症。结果 36例患者中,^18FD GPET较CT而言,大体肿瘤体积大小无变化的占36.1%(13/36)、增加的占16.7%(6/36)、缩小的占47.2%(17/36)。1、2、3年局部控制率分别为97.2%、75.0%、58.3%;1、2、3年生存率分别为94.4%、86.1%、72.0%;1、2、3年无瘤生存率分别为85.7%、76.6%、56.1%。急性放射反应主要是急性放射性口咽、鼻咽粘膜炎和口干,多为Ⅰ~Ⅱ级。晚期放射损伤包括听力丧失5.6%(2/36)、张口困难25.0%(9/36)、吞咽困难8.3%(3/36)、慢性副鼻窦炎33.3%(12/36)、脑神经损伤13.9%(5/36)。结论 三维适形放射治疗结合^18FDG PET确定靶区范围在鼻咽癌放射治疗后鼻咽部局部复发或残留中有较好的疗效,同时由于靶区缩小而使放射损伤发生率降低。 相似文献
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Post-radiation CT changes and recurrent nasopharyngeal carcinoma 总被引:3,自引:0,他引:3
Background Nasopharyngeal carcinoma (NPC) is endemic in Southern Asia. Radiation therapy remains the mainstay of treatment strategies for NPC. Although approximately 19%-56% of patients develop a recurrent disease 5 years after their primary treatment, recognition of post-radiation changes and early detection of relapse are important in improving the outcome of NPC. Our aim was to analyze the post-radiation changes and recurrent diseases related to NPC using computed tomography (CT) scans and to investigate their relationship.
Methods CT scans of 510 pathologically proven NPC patients who have been followed up for more than 2 years after radiation were reviewed. The tumor's response to the radiation therapy and its relevance to recurrence were evaluated.
Results For patients who were followed up for more than 2 years, their CT scans-obtained within 3 months, during the 4th to the 6th month, and beyond 7 months after radiation therapy, showed a normal nasopharyngeal cavity with a slight thickening in the wall in 93.5%, 95.0% and 84.8% of the patients respectively. The degree of tumor regression had no significant relevance to the risk of recurrence within the initial 3 months (P=0.094). During this term, the relapse rates in the cases in which the nasopharyngeal walls were displayed as normal, slightly or moderately thickening, or with obvious residual masses on CT scans were 7.1%, 11.7%, 23.5% and 23.1% respectively. The degree of tumor regression beyond 3 months after radiation therapy had a considerable reverse relevance to the risk of recurrence (P=-0.000). The relapse rates were 13.2%, 14.1%, 10.2% and 2.1%, respectively, in the cases with a normal and a slightly thickening nasopharyngeal wall during the 4th to the 6th month, the 7th to the 12th month, the 13th to the 24th month, and beyond 25 months after radiation. In contrast, the percents in cases with moderate or more aggressive thickening walls in the corresponding periods were 62.5%, 88.9%, 100% and 100%. Within 6 months after rad 相似文献
Methods CT scans of 510 pathologically proven NPC patients who have been followed up for more than 2 years after radiation were reviewed. The tumor's response to the radiation therapy and its relevance to recurrence were evaluated.
Results For patients who were followed up for more than 2 years, their CT scans-obtained within 3 months, during the 4th to the 6th month, and beyond 7 months after radiation therapy, showed a normal nasopharyngeal cavity with a slight thickening in the wall in 93.5%, 95.0% and 84.8% of the patients respectively. The degree of tumor regression had no significant relevance to the risk of recurrence within the initial 3 months (P=0.094). During this term, the relapse rates in the cases in which the nasopharyngeal walls were displayed as normal, slightly or moderately thickening, or with obvious residual masses on CT scans were 7.1%, 11.7%, 23.5% and 23.1% respectively. The degree of tumor regression beyond 3 months after radiation therapy had a considerable reverse relevance to the risk of recurrence (P=-0.000). The relapse rates were 13.2%, 14.1%, 10.2% and 2.1%, respectively, in the cases with a normal and a slightly thickening nasopharyngeal wall during the 4th to the 6th month, the 7th to the 12th month, the 13th to the 24th month, and beyond 25 months after radiation. In contrast, the percents in cases with moderate or more aggressive thickening walls in the corresponding periods were 62.5%, 88.9%, 100% and 100%. Within 6 months after rad 相似文献
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目的观察逐步递量加速超分割放射治疗复发性鼻咽癌的近期疗效及毒副反应。方法46例复发性鼻咽癌随机分为常规分割放疗组(对照组)及逐步递量加速超分割放疗组(研究组),每组各23例。对照组:常规照射,2Gy/次,1次/d,5次/周,鼻咽部复发灶总剂量DT60—66Gy/6.0~6.6周;研究组:第1、2、3、4、5周剂量分别为1.1、1.2、1.3、1.4、1.5Gy/次,每天2次,两次间隔时间〉6h,每周5次,鼻咽部复发灶总剂量DT65Gy/5周。结果放疗结束后3个月,研究组和对照组鼻咽复发灶完全缓解(CR)、部分缓解(PR)率分别为82.6%、17.4%和52.2%、47.8%(P〈0.05),两组比较差异有统计学意义。研究组口咽急性放射性反应高于对照组(P〈0.05),但是可以耐受。结论逐步递量加速超分割放疗能提高复发性鼻咽癌的近期疗效,急性放射性反应患者可以耐受,远期疗效和后期放射损伤有待进一步随诊观察。 相似文献
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目的观察不同放疗方式对患者颞颌关节损伤的影响,为不同条件的患者制定个体化的放疗计划提供参考。方法回顾性分析71例初治鼻咽癌患者,三维适形放疗(3D-CRT)组39例,适形调强放疗(IMRT)组32例,以门齿距及LENT SOMA标准为评价指标,比较两组之间疗效及性价比。结果 3D-CRT组近期局部控制率与IMRT组无差异(P=0.878);3D-CRT组的颞颌关节受量高于IMRT组(平均57.06 Gy和40.90 Gy,P<0.001);比较两组放疗后1年与放疗前门齿距差值,3D-CRT组缩小较明显,具有统计学意义(P<0.05);两组患者颞颌关节损伤按SOMA分级标准比较,无统计学差异(P>0.05)。结论相对于IMRT技术来说,3D-CRT技术具有很好的经济优势,颞颌关节的损伤可耐受,3D-CRT技术对于经济条件较差的患者仍是性价比较好的治疗选择。 相似文献
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目的: 比较容积旋转调强(VMAT)、固定野调强(IMRT)和三维适形(3D-CRT)放疗技术在局部复发鼻咽癌患者治疗中的剂量学参数,分析3种治疗计划的剂量学特性。方法:选择12例局部复发的鼻咽癌患者,采用Pinnacle 9.2和eciseplan 2.03治疗计划系统,每例患者均设计VMAT﹑IMRT和3D-CRT ,比较3组计划的剂量分布及危及器官受量等。结果: MAT及IMRT组适形度指数(CI)相似,但均优于3D-CRT组,组间比较差异有统计学意义(P<0.05)。3组计划的靶区不均匀指数(HI)相近,组间比较差异无统计学意义(P>0.05)。3D-CRT组机器跳数(MU)及出束时间优于其他2组,VMAT组优于IMRT组,组间比较差异均有统计学意义(P<0.05)。危及器官受量,3组计划脑干及晶体受量比较差异无统计学意义(P>0.05);VMAT组和IMRT组脊髓、视神经、视交叉和大脑颞叶的受量明显优于3D-CRT组,组间比较差异有统计学意义(P<0.05),但VMAT组与IMRT组比较差异无统计学意义(P>0.05)。 结论: 3种放疗技术的治疗计划剂量分布有差异,VMAT与IMRT计划均能较好覆盖靶区,并减少周围正常组织受量,满足临床需求。VMAT计划的靶区适形度、MU和出束时间优于IMRT计划。3D-CRT仅在MU和治疗时间上有优势。 相似文献
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Objectives:To evaluate the role of adjuvant radiation therapy in patients with locoregionally recurrent (rpT4/N1b) papillary thyroid carcinoma (PTC).Methods:The medical records of patients with rpT4/N1b PTC who were treated between January 2001 and December 2016 were reviewed. A total of 57 patients were analyzed, of which 24 patients were treated with adjuvant radiation therapy, and 33 patients did not receive adjuvant radiation therapy. Survival outcomes were compared between the 2 treatment groups. The primary endpoint was locoregional recurrence-free survival rate.Results:The median follow-up period for all patients was 10.3 years (range, 2.8-19.2 years). The 15-year locoregional recurrence-free survival rate was 80.5% for those who received adjuvant radiation therapy and 28.1% for those who did not (p<0.001). The 15-year distant metastasis-free survival rate was 48.8% for those who received adjuvant radiation therapy and 33.4% for those who did not (p=0.906). The 15-year overall survival rate was 69.7% for those who received adjuvant radiation therapy and 53.1% for those who did not (p=0.921).Conclusions:Adjuvant radiation therapy ensured favorable locoregional recurrence-free survival in patients with rT4/N1b PTC and might contribute to improving patients’ quality of life by reducing the need for additional salvage surgery and the economic burden of other salvage treatments, such as surgery or radioactive iodine therapy. 相似文献
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杨晓蓉 《中国现代医学杂志》2012,22(21):80-82
目的探讨鼻咽癌放射治疗对甲状腺的影响。方法收集43例接受放射治疗的鼻咽癌患者资料,观察其甲状腺体积及激素水平变化,记录引起甲状腺损伤时的放疗剂量。结果患者放疗后甲状腺体积缩小,FT3及FT4水平降低,较放疗前具有统计学意义(P<0.05);随访发现FT3及FT4水平降低,于放疗后12个月开始具有统计学意义(P<0.05),后有所回升,TSH则持续升高,具有统计学意义(P<0.05);引起FT3及FT4水平变化的放疗剂量为4 500 cGy,引起TSH水平变化的放疗剂量为5 500 cGy。结论鼻咽癌患者放射治疗可对甲状腺造成损伤,放疗剂量阈值在4 500~5 500 cGy左右。 相似文献
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目的探讨奈达铂联合后程三维适形放疗(3D-CRT)治疗局部晚期鼻咽癌的疗效及毒副反应。方法入组109例局部晚期鼻咽癌患者随机分为两组,其中观察组59例接受常规放疗、后程3D-CRT联合同步周剂量奈达铂化疗;对照组50例仅接受常规放疗、后程3D-CRT。结果观察组有效率为84.75%,高于对照组的66.00%(P<0.05)。观察组白细胞减少、血小板减少、口腔黏膜炎及过敏反应发生率高于对照组(P<0.05),但两组患者毒副反应经对症处理后均可缓解,未影响治疗的顺利进行。结论奈达铂联合后程3D-CRT治疗鼻咽癌疗效较好,毒副反应可耐受。 相似文献
19.
徐昌 《中国现代医学杂志》2013,23(19)
目的 对比研究调强放疗(intensity modulated radiation therapy,IMRT)及三维适形放疗(three-dimensional conformal radiation therapy,3D-CRT)治疗前列腺癌,评价两种放疗方法的优缺点.方法 对39例采用IMRT的前列腺患者及33例采用3D-CRT的前列腺患者的放疗剂量、放疗前后血清前列腺癌特异性抗原(prostate specific antigen,PSA)水平、复发率、转移率、不良反应发生率及死亡率进行统计分析,分析生化复发与远处转移的相关性.结果 IMRT组的放疗剂量小于3D-CRT的放疗剂量,差异具有显著性(t=-4.153,P=0.042);放疗前,IMRT组及3D-CRT组血清PSA水平差异无显著性(t=-3.826,P=0.069);放疗后,IMRT组血清PSA水平小于3D-CRT组血清PSA水平,差异具有显著性(=-7.202,P=0.021);IMRT组患者发生生化复发的时间及远处转移的时间均大于3D-CRT组,差异均具显著性(t=5.103,P=0.035;t =4.711,P=0.039).IMRT患者的发生生化复发率为10.26%,远处转移率为10.26%,泌尿系统副反应发生率10.26%,直肠副反应发生率12.82%,死亡率6.06%,3D-CRT患者的发生生化复发率为21.21%,远处转移率为18.18%,泌尿系统副反应发生率12.12%,直肠副反应发生率18.18%,死亡率10.26%.发生远处转移的时间与发生生化复发的时间呈直线正相关(r=0.773,P =0.009).结论 IMRT在剂量、疗效及不良反应方面均优于3D-CRT,而费用高于3D-CRT. 相似文献