肺癌脑转移瘤同期加量调强放疗与序贯加量放疗的对比研究

摘 要：［目的］ 比较肺癌脑转移瘤同期加量调强放疗与序贯加量放疗的疗效及不良反应。［方法］ 选择2018年1月至2019年7月收治的肺癌脑转移患者44例作为研究对象,随机分为同期加量调强放疗组(SIB-IMRT)23例和适形序贯加量放疗组(WBRT+3D-CRT)21例,SIB-IMRT组全脑5-7野IMRT(40Gy/20f)+瘤床SIB(50Gy/20f);WBRT+3D-CRT组首先WBRT (40Gy/20f),紧接着缩野至瘤床P-GTV(18.4Gy/8f)。比较两组患者临床疗效、急性不良反应及住院治疗时间。［结果］ 客观缓解率在SIB-IMRT组和WBRT+3D-CRT组分别为82.6%和52.4%(P=0.03)。SIB-IMRT组和WBRT +3D-CRT组疾病控制率分别为91.3%和71.4%(P=0.09)。SIB-IMRT组和WBRT +3D-CRT组患者的中位生存时间分别为12.5个月和8.2个月,SIB-IMRT组1、2年生存率分别为53.8%、29.6%;WBRT+3D-CRT组为36.5%、10.9%,SIB-IMRT组的总生存时间明显优于WBRT+3D-CRT组(P=0.03)。两组患者均未出现Ⅲ级以上急性神经系统不良反应以及Ⅲ级以上骨髓抑制,SIB-IMRT组放射诱发的脑水肿发生率为17.4％(4/23),WBRT+3D-CRT组为23.8％(5/21)(P=0.60);两组Ⅰ~Ⅱ级急性骨髓抑制发生率分别为30.4％(7/23)、23.8％(5/21)(P=0.62)。两组患者完成脑转移瘤住院治疗时间有显著性差异(P<0.01)。［结论］ 同期加量调强放疗肺癌脑转移瘤较适形序贯加量放疗疗效好,未增加急性不良反应,缩短了总治疗时间,节省了医疗资源。     

全脑放疗联合旋转式伽马刀治疗肺癌脑转移疗效观察

目的:探讨全脑放疗联合旋转式伽马刀治疗肺癌脑转移瘤患者的近期疗效和毒副作用。方法:2001年1月至2008年12月,对52例经原发病灶病理诊断证实的肺癌脑转移初治患者,采用全脑放疗加旋转式伽马刀治疗,全脑照射(30Gy/10f/2w或者40Gy/20f/4w)后,采用旋转式伽马刀治疗针对脑转移灶局部加量。结果:52例患者按计划完成治疗,总有效率[完全缓解(CR)+部分缓解(PR)]98.1%(51/52)。结论:全脑放疗加旋转式伽马刀治疗肺癌脑转移瘤近期疗效显著,患者耐受良好。     

全脑放疗同步瘤床推量治疗肺癌脑转移瘤临床疗效及预后分析

目的 比较合并1~4个脑转移灶的肺癌患者采用图像引导适形调强放射治疗（image-guided intensity-modulated radiotherapy, IG-IMRT）技术行全脑放疗（wholebrain radiotherapy, WBRT）同步瘤床推量及序贯瘤床推量治疗的近期临床疗效及安全性,探讨肺癌脑转移患者最佳放疗方案。方法 回顾性分析绵阳市第三人民医院2014年5月至2017年5月确诊为肺癌脑转移患者共98例,选取接受WBRT+同步瘤床推量放疗的49例患者为观察组,另选取同时接受WBRT后序贯瘤床推量放疗的49例患者为对照组,比较两组患者的临床疗效及安全性。两组患者均采用IG-IMRT,治疗过程中每天行锥形束CT（cone beam CT, CBCT）校对摆位误差。结果 观察组的放疗总有效率、肿瘤局部控制率和1年生存率分别为87.80%（43/49）、95.92%（47/49）、65.31%（32/49）高于对照组的61.20%（30/49）、81.60%（40/49）、44.90%（22/49）,差异有统计学意义（均P<0.05）,中位生存期观察组（15月）高于对照组（12月）。安全性评价：无3、4级急性及晚期不良反应,主要不良反应为脱发、恶心、呕吐、认知功能障碍、记忆力损伤。结论 图像引导下适形调强全脑放疗同步瘤床推量可能是临床治疗肺癌脑转移瘤一种安全、有效的治疗方式。     

非小细胞肺癌脑转移调强放射治疗13例

 目的　通过观察调强放射疗法（IMRT）治疗非小细胞肺癌（NSCLC）脑转移疗效,探讨其临床意义。方法　2008年5月至2009年11月采用共面5野同步补量（SIB）IMRT治疗13例NSCLC脑转移患者,全脑剂量[计划靶区（PTV）-临床靶区（CTV）]2 Gy／次,DT 40 Gy,脑转移灶[PTV-肿瘤靶区（GTV）]2.5～2.8 Gy／次,DT 50～56 Gy,均为5次／周,共20次。同步结束,95 %的等剂量曲线包括靶区,放疗结束后行脑部CT或MRI评价疗效。结果　CR为4例,PR为8例,SD为1例。治疗有效率92.3 %（12／13）。结论　全脑及脑转移灶IMRT治疗NSCLC脑转移有较高的局控率,不良反应轻,值得推广应用。     

容积旋转调强放疗行同期推量治疗脑转移瘤的疗效分析

目的:分析采用容积旋转调强技术同期推量（SIB-VMAT）治疗合并1~4个脑转移瘤患者的疗效及不良反应。方法:65例脑转移瘤患者随机分为同期推量组(34例)及序贯组（31例）,同期推量组PGTV 50 Gy/20 f;序贯组PTV 40 Gy/20 f,全脑放疗结束后给予PGTV加量,10 Gy/5 f。比较两组的有效率、不良反应及1年生存率。结果:本研究显示,同期推量组有效率为88.2%,明显高于序贯组,且放疗不良反应两组间无差异,患者可耐受。结论:同期推量放疗是治疗1~4个脑转移瘤的有效手段。     

非小细胞肺癌脑转移不同放疗方式疗效分析

为了比较不同放疗方式对非小细胞肺癌(NSCLC)脑转移的疗效及预后影响因素,回顾性分析97例NSCLC脑转移患者的临床资料.23例接受全脑放疗2周30 Gy/10次(A组);45例接受全脑放疗4周40 Gy/20次(B组);29例接受全脑放疗4周40 Gy/20次,然后局部缩野加量1周10 Gy/5次(C组).A组中住生存时间8.7个月,1年局部控制率为23%;B组中位生存时间8.8个月,1年局部控制率为63%;C组中位生存时间9.2个月,1年局部控制率为84%.3组中位生存时间差异均无统计学意义(P>0.05),但C组1年局部控制率明显高于A组.单因素分析表明,颅外转移及脑转移瘤个数是预后的危险因素;多因素Cox模型分析表明,颅外部位转移是预后的独立危险因素.初步研究结果提示,NSCLC脑转移的预后与颅外转移及脑转移瘤个数有关,颅外转移是影响预后的独立因素.     

伽玛刀加体外照射治疗脑转移瘤疗效观察

 目的　观察脑转移瘤采用伽玛刀加体外照射 (SRS +R)及单纯放疗 (R)的临床效果。方法　 1995年 5月～ 2 0 0 0年 12月 ,38例脑转移瘤患者行SRS +R治疗 ,中心剂量 5 0～ 6 0Gy ,周边剂量 2 0～ 2 5Gy ,全脑外照射 30～ 4 0Gy/ 3～ 4周。 4 6例R治疗 ,全脑照射同前 ,缩野追加至 4 0～ 6 0Gy。 结果　中位生存期、1年生存率、肿瘤局部控制率 ,SRS +R组分别为 10月、6 0 .5 %及 92 .1% ;R组分别为 5 .3月、17.4 %及 2 1.7% (P <0 .0 1)。结论　SRS +R治疗脑转移瘤在延长患者生存期及肿瘤局部控制率明显优于R组。     

早期乳腺癌保乳术后全乳大分割照射同步瘤床加量的临床分析

目的：观察早期乳腺癌保乳术后全乳大分割照射同步瘤床加量的短期疗效与不良反应。方法64例早期乳腺癌患者保乳术后行两野切线全乳照射,全乳腺照射40．5 Gy／15 f,单次剂量2．7 Gy／f,同步瘤床推量至48 Gy／15 f,单次剂量3．2 Gy／f,总疗程3周,观察分析患者局部复发情况、美容效果及不良反应。结果中位随访时间17月,随访率为100％,无局部复发情况发生。3例患者表现乳腺中度胀痛;Ⅰ、Ⅱ、Ⅲ级急性皮肤反应发生率分别为17．2％、4．7％、1．6％;Ⅰ级血小板下降发生率与Ⅰ～Ⅱ级中性粒细胞减少发生率分别为1．6％、4．7％;放疗完成后4、7月美容优良率分别为90．6％、87．5％。结论早期乳腺癌保乳术后全乳放疗同步瘤床加量的短期疗效与以往常规放疗方式相似,缩短放疗时间,不会增加皮肤不良反应及降低美容效果。     

全脑放疗联合立体定向分割放疗治疗脑转移瘤30例

[目的]探讨全脑放疗加立体定向分割放疗治疗脑转移瘤患者的疗效。[方法]30例1～4个脑转移瘤患者接受全脑放疗30~36Gy/（15~30f·3~3.5w）后加立体定向分割放疗25Gy/（5f·1周）（WBRT＋SRT组）。30例1～4个脑转移瘤患者接受单纯全脑放疗30Gy/（10f·2周）（WBRT组）。分析两组患者的1年局控率和1年生存率。[结果]WBRT＋SRT组和WBRT组1年局控率分别为76.3%、23.5%（P〈0.01）,1年生存率分别为46.7%、13.3%（P〈0.05）。两组均未出现严重毒副反应。[结论]全脑放疗加立体定向分割放疗（WBRT＋SRT）治疗脑转移瘤患者安全有效,可提高1～4个脑转移瘤病灶患者的1年局控率和1年生存率。     

放疗为主的综合方案治疗脑膜转移瘤Ⅱ期临床研究

目的 前瞻性分析脑膜转移瘤以放疗为主的综合治疗方案的有效性及安全性。方法 纳入2014-2017年中国医学科学院肿瘤医院收治的93例脑膜转移瘤患者,接受螺旋断层放疗技术实施的全脑放疗、局部推量和/或全脊髓照射为基础的综合治疗,记录临床症状、磁共振检查、脑脊液细胞学、液体活检变化情况及不良反应。主要研究终点为总生存(OS),次要研究终点为局部控制(LC)、颅内无进展生存(IPFS)及脑转移专项生存(BMSS)及不良反应。结果 主要原发病为非小细胞肺癌。全组接受全脑放疗±局部推量(中位剂量分别为40Gy分20次、60Gy分20次)或全脑、全脊髓照射(中位剂量分别为40Gy分20次或50Gy分25次、36Gy分20次)。20例找到肿瘤细胞并行鞘注化疗;63例接受靶向治疗。中位随访时间33.8个月,1年OS、LC及IPFS分别为62%、77%及53%。中位生存时间15.9个月,中位BMSS时间42.2个月。3-4级不良反应少见,仅观察到8例3级血液学不良反应。结论 精准放疗结合鞘注化疗或靶向治疗的综合治疗方法,可有效延长脑膜转移瘤患者的生存时间,且不良反应可耐受。     

Initial evaluation of treatment-related pneumonitis in advanced-stage non-small-cell lung cancer patients treated with concurrent chemotherapy and intensity-modulated radiotherapy

PURPOSE: To investigate the rate of high-grade treatment-related pneumonitis (TRP) in patients with advanced non-small-cell lung cancer (NSCLC) treated with concurrent chemotherapy and intensity-modulated radiotherapy (IMRT). METHODS AND MATERIALS: From August 2002 to August 2005, 151 NSCLC patients were treated with IMRT. We excluded patients who did not receive concurrent chemotherapy or who had early-stage cancers, a history of major lung surgery, prior chest RT, a dose <50 Gy, or IMRT combined with three-dimensional conformal RT (3D-CRT). Toxicities were graded by Common Terminology Criteria for Adverse Events version 3.0. Grade > or = 3 TRP for 68 eligible IMRT patients was compared with TRP among 222 similar patients treated with 3D-CRT. RESULTS: The median follow-up durations for the IMRT and 3D-CRT patients were 8 months (range, 0-27 months) and 9 months (range, 0-56 months), respectively. The median IMRT and 3D-CRT doses were 63 Gy. The median gross tumor volume was 194 mL (range, 21-911 mL) for IMRT, compared with 142 mL (range, 1.5-1,186 mL) for 3D-CRT (p = 0.002). Despite the IMRT group's larger gross tumor volume, the rate of Grade > or = 3 TRP at 12 months was 8% (95% confidence interval 4%-19%), compared with 32% (95% confidence interval 26%-40%) for 3D-CRT (p = 0.002). CONCLUSIONS: In advanced NSCLC patients treated with chemoradiation, IMRT resulted in significantly lower levels of Grade > or = 3 TRP compared with 3D-CRT. Clinical, dosimetric, and patient selection factors that may have influenced rates of TRP require continuing investigation. A randomized trial comparing IMRT with 3D-CRT has been initiated.     

Incidence of late rectal and urinary toxicities after three-dimensional conformal radiotherapy and intensity-modulated radiotherapy for localized prostate cancer

PURPOSE: To report the incidence and predictors of treatment-related toxicity at 10 years after three-dimensional conformal radiotherapy (3D-CRT) and intensity-modulated radiotherapy (IMRT) for localized prostate cancer. METHODS AND MATERIALS: Between 1988 and 2000, 1571 patients with stages T1-T3 prostate cancer were treated with 3D-CRT/IMRT with doses ranging from 66 to 81 Gy. The median follow-up was 10 years. Posttreatment toxicities were all graded according to the National Cancer Institute's Common Terminology Criteria for Adverse Events. RESULTS: The actuarial likelihood at 10 years for the development of Grade>or=2 GI toxicities was 9%. The use of IMRT significantly reduced the risk of gastrointestinal (GI) toxicities compared with patients treated with conventional 3D-CRT (13% to 5%; p<0.001). Among patients who experienced acute symptoms the 10-year incidence of late toxicity was 42%, compared with 9% for those who did not experience acute symptoms (p<0.0001). The 10-year incidence of late Grade>or=2 genitourinary (GU) toxicity was 15%. Patients treated with 81 Gy (IMRT) had a 20% incidence of GU symptoms at 10 years, compared with a 12% for patient treated to lower doses (p=0.01). Among patients who had developed acute symptoms during treatment, the incidence of late toxicity at 10 years was 35%, compared with 12% (p<0.001). The incidence of Grade 3 GI and GU toxicities was 1% and 3%, respectively. CONCLUSIONS: Serious late toxicity was unusual despite the delivery of high radiation dose levels in these patients. Higher doses were associated with increased GI and GU Grade 2 toxicities, but the risk of proctitis was significantly reduced with IMRT. Acute symptoms were a precursor of late toxicities in these patients.     

低位直肠癌术前调强放疗同步加量并同步口服卡培他滨化疗的初步研究

目的探讨低位直肠癌调强放射治疗（IMRT）同步加量并同步口服卡培他滨化疗的毒副作用,并初步分析其疗效。方法回顾性分析16例接受术前IMRT同步加量放疗同时口服希罗达化疗,临床诊断为T_（2～4）和/或N_（1～2）的低位直肠腺癌患者,放射治疗采用5野IMRT技术,共25次5周,全盆腔45～50Gy,肿瘤及其周围2cm范围同步加量至55～60Gy。同时口服卡培他滨625mg/m~2,每日2次,应用2周后休息1周,再继续口服至放疗结束。手术于放疗结束后8～10周进行。记录分析所有病例的毒副作用及远近期疗效。结果所有病例顺利完成治疗,无治疗中断者。有11例患者（68.8%）出现Ⅲ度皮肤反应,无Ⅲ度以上腹泻、血液学及泌尿系统毒副作用,仅1例患者（6.3%）出现晚期Ⅱ度胃肠道毒副作用。放疗后评估临床完全缓解7例（43.8%）,部分缓解8例（50%）。12例（75%）患者保肛,其中手术并保肛7例,肿物消失拒绝手术5例。2年总生存率85.7%,无病生存率76.6%,局部复发率6.3%。结论低位直肠癌调强放射治疗（IMRT）同步加量并同步口服卡培他滨化疗有一定效果且患者耐受良好,值得进一步探索研究。     

立体定向放射治疗肺癌脑转移疗效分析

目的探讨不同放射治疗方法对肺癌脑转移的疗效.方法176例由病理学证实的肺癌脑转移患者分为4组:单纯全脑放疗(WBRT)组、全脑放疗加立体定向放射外科(WBRT SRS)组、单纯立体定向放射治疗(SRT)组、全脑放疗加立体定向放射治疗(WBRT SRT)组.SRS治疗单次靶区平均周边剂量8～20Gy,总剂量20～32Gy;SRT治疗单次靶区平均周边剂量2～5Gy,总剂量25～60Gy;WBRT1.8～2Gy/次,总剂量30～40Gy.结果四组的局部控制率分别为47.0%、87.7%、86.5%和78.0%;中位生存期分别为5.0,11.0,11.5和10.0个月;局部无进展生存期分别为3.33,8.33,9.33和7.67个月;颅脑无新病灶生存期分别为4.11,8.57,9.03和6.12个月.在死因分析中,WBRT组死于脑转移的比率为57.6%,较其他三组高.而WBRT SRS组的晚期放射反应的发生率为12.2%,较其他组高.结论肺癌单发脑转移瘤患者的最佳治疗方式是单纯立体定向放射治疗,治疗失败后再行挽救性全脑照射或立体定向放疗.对于多发脑转移,全脑放疗加立体定向放射治疗(WBRT SRT)在提高生存率以及减少并发症方面优于其他治疗方法.     

Intensity-modulated radiotherapy with concurrent chemotherapy for previously irradiated, recurrent head and neck cancer

PURPOSE: Primary treatment fails in >70% of locally advanced head and neck cancer patients. Salvage therapy has a 30-40% response rate, but few long-term survivors. Intensity-modulated radiotherapy (IMRT) has recently emerged as a new modality for salvage therapy. This retrospective study evaluated our experience using every-other-week IMRT with concurrent chemotherapy. METHODS AND MATERIALS: Between 2001 and 2006, 41 patients underwent IMRT as repeat RT with concurrent chemotherapy. All but 6 patients received 60 Gy at 2 Gy/fraction. RT was delivered on an alternating week schedule. RESULTS: With a median follow-up time of 14 months, the overall response rate was 75.6%, with a complete response and partial response rate of 58.5% and 17.1%, respectively. The Kaplan-Meier estimate of overall survival, disease-free survival, and progression-free survival at 24 months was 48.7%, 48.1%, and 38%, respectively. Patients who underwent surgery as a part of their salvage therapy had a mean estimated survival of 30.9 months compared with 22.8 months for patients who received only chemoradiotherapy (p = 0.126). Grade 3 or 4 acute toxicities occurred in 31.7% of patients, but all had resolved within 2 months of therapy completion. No deaths occurred during treatment, except for 1 patient, who died shortly after discontinuing treatment early because of previously undiagnosed metastatic disease; 6 patients had long-term complications. CONCLUSIONS: Concurrent chemotherapy with repeat radiotherapy with IMRT given every other week appears to be both well tolerated and feasible in patients treated with previous radiotherapy for recurrent head and neck cancer. IMRT represents a reasonable modality for reducing treatment-related toxicities in a repeat RT setting.     

同时性双侧乳腺癌保乳术后放疗技术和近期疗效分析

目的 探讨同时性双侧乳腺癌整体等中心切线野混合调强技术的剂量特点及疗效。方法 纳入14例同时性双侧乳腺癌保乳术后双侧全乳±瘤床加量放疗患者。采用等中心切线野混合调强技术进行双乳整体放疗(50Gy分25次或43.5Gy分15次)。分析计划的覆盖度、均匀性及临床近期疗效。结果 全组患者放疗计划总野数为8~11个,其中调强野为4~7个。全乳计划靶区均达95%,平均瘤床覆盖度在X线同步补量组分别为(95.54±1.33)%(左)及(94.19±1.03)%(右),在电子线序贯补量组为(90.25±8.79)%(左)及(85.28±8.35)%(右)。平均双肺V20为(16.69±3.90)%,平均心脏Dmean为5.48Gy。全组3例出现2级急性皮肤反应,无≥2级的放射性肺炎发生。中位随访至30.1个月时,11例美容效果为优,无一复发。结论 双乳腺癌保乳术后采用整体等中心切线野混合调强技术安全可靠。     

IMRT同步剂量补偿高剂量率后装治疗大体积宫颈癌的疗效分析

目的 探讨IMRT同步剂量补偿高剂量率后装治疗方法在局部晚期宫颈癌治疗中的价值。方法 2010-2015年四川省肿瘤医院病理诊断明确的120例肿瘤最大径≥6 cm或最大径≥5 cm且肿瘤呈偏心性生长的宫颈癌患者接受盆腔外放疗,之后予以后装联合同步IMRT剂量补偿同步顺铂化疗。IMRT 45 Gy分25次,后装联合同步IMRT剂量补偿HR-CTV 7 Gy/次、IR-CTV 5~6 Gy/次,共5次;危及器官勾画直肠、乙状结肠、膀胱及毗邻小肠。所有入组患者均接受以顺铂75 mg/m² ,每3周1次为基础同步化疗。结果 全组患者随访14~96个月(中位数46个月)。5年局部控制、无进展生存、总生存率分别为92.8%、76.6%、81.0%。胃肠道、泌尿生殖系统急性1-2级早期不良反应分别为57.8%、14.6%,3级分别为8.1%、2.9%;晚期1-2级不良反应分别为8.4%、5.3%,3级分别为0.97%、1.3%。结论 IMRT联合同步剂量补偿HDR-ICBT方法治疗局部晚期宫颈癌严重不良反应发生率低,且具有较好的局部控制率和总生存率,是肿瘤体积较大的局部晚期宫颈癌患者综合治疗的有效方法。     

Concurrent chemotherapy (carboplatin, paclitaxel, etoposide) and involved-field radiotherapy in limited stage small cell lung cancer: a Dutch multicenter phase II study

To improve the prognosis of limited stage small cell lung cancer (LS-SCLC) the addition of concurrent thoracic radiotherapy to a platinum-containing regimen is important. In the Netherlands, we initiated a multicenter, phase II study, of the combination of four cycles of carboplatin (AUC 5), paclitaxel (200 mg m(-2)) and etoposide (2 x 50 mg orally for 5 days) combined with 45 Gy (daily fractions of 1.8 Gy). The radiation was given to the involved field and concurrently with the second and third chemotherapy cycle. Patients with a partial or complete response received prophylactic cranial irradiation to a dose of 30 Gy. From January 1999 to December 2001, 37 of the 38 patients with LS-SCLC entered were eligible for toxicity analysis and response. Grade 3 and 4 haematological toxicity occurred in 57% (21/37) with febrile neutropenia in 24% (9/37). There were no treatment-related deaths or other grade 4 toxicity. Grade 3 toxicities were oesophagitis (27%), radiation pneumonitis (6%), anorexia (14%), nausea (16%), dyspnea (19%) and lethargy (22%). The objective response rate was 92% (95% confidence interval (CI) 80-98%) with a median survival time of 19.5 months (95% CI 12.8-29.2). The 1-, 2- and 5-year survival rate was 70, 47 and 27%, respectively. In field local recurrences occurred in six patients. Distant metastases were observed in 19 patients of which 13 in the brain. This study indicates that combination chemotherapy with concurrent involved-field radiation therapy is an effective treatment for LS-SCLC. Despite PCI, the brain remained the most important site of recurrence.     

98例老年前列腺癌根治术后调强技术放疗结果分析

目的 回顾分析老年前列腺癌患者根治术后接受调强技术放疗疗效和不良反应。 方法 2007-2017年收治 98例接受术后放疗的前列腺癌患者,中位年龄 68岁。全组患者中低危 10例、中危 21例、高危 67例。2例患者存在寡转移(均为骨盆骨转移),64例患者联合了内分泌治疗。全组患者中 43例接受辅助放疗,55例接受挽救放疗。放疗均采用了调强技术(55例调强放疗、43例容积调强弧形治疗),前列腺瘤床中位剂量72 Gy。共 29例接受了盆腔淋巴结区域照射,中位放疗剂量50 Gy。 结果 中位随访40个月,全组 5年总生存率、无生化复发生存率、局部控制率分别为90%、76%、100%。辅助放疗和挽救放疗的总生存率、无生化复发生存率、局部控制率均相近[89%和91%(P=0.94)、76%和71%(P=0.79)、100%和100%(P=0.32)]。不良反应方面 1-2级晚期直肠反应发生率为24.1%,1-2级晚期膀胱反应发生率为29.9%,3级为3.4%。 结论 前列腺癌根治术后采用调强技术放疗可以获得很好的疗效,晚期不良反应轻微。