弥漫性大B细胞淋巴瘤（DLBCL）是最常见的高度异质性非霍奇金淋巴瘤（NHL）,不同的疾病阶段或临床亚型预后不尽相同。放射治疗作为无交叉耐药的理想局部治疗技术,应用于DLBCL可有效改善患者预后。初治DLBCL通过放射治疗联合化学治疗、免疫治疗等综合治疗可使约60%~70%患者疾病缓解。对于不同预后影响因素,如年龄、肿瘤体积、淋巴结外侵犯等,联合放射治疗也可取得更佳疗效。在复发性/难治性DLBCL的治疗中,自体造血干细胞移植（ASCT）和嵌合抗原受体T细胞免疫治疗（CAR-T）是目前的研究热点,而放射治疗无论是作为ASCT与CAR-T术前的桥接治疗或失败后的挽救性治疗均有助改善患者预后。随着放射治疗技术的日益优化,放射治疗在综合治疗方案中扮演着越来越重要的角色。

Diffuse large B-cell lymphoma（DLBCL）is a highly heterogeneous type of non-Hodgkin lymphoma（NHL）and its prognosis is different for different disease stages or clinical subtypes．Radiation therapy（RT）is a local treatment technique that does not cause cross-resistance and can effectively improve the prognosis of patients with DLBCL．When combined with chemotherapy and immunotherapy,RT can alleviate the disease in more than 60% of patients．Furthermore,RT can achieve better results for different prognostic factors such as age,tumor volume and external nodal invasion．For treating relapsed / refractory DLBCL,autologous stem cell transplantation（ASCT）and chimeric antigen receptor T cell immunotherapy（CAR-T）are currently being researched,while RT can help as bridging therapy before ASCT and CAR-T or salvage therapy after failure．With the increasing optimization of technology,radiotherapy plays an increasingly important role in combined treatment options．

目的 利用高精确的外照射治疗技术,即图像引导放射治疗/容积旋转调强放疗(IGRT/VMAT) 时,使用千伏锥形束CT (kV-CBCT)定位来获得最佳的宫颈癌治疗获益。方法 205例接受IGRT/VMAT治疗的宫颈癌患者纳入实验组。每周做一次kV-CBCT定位后,将这些图像与计划CT扫描图像匹配后记录摆位误差。总共研究了1 025个kV-CBCT图像。采取同时期常规X片定位的90例宫颈癌患者作为对照组。根据定位中的摆位误差计算计划靶区(PTV)的边界。结果 实验组前后、上下和左右方向的摆位误差分别为(1.8±1.1)mm、(2.8±2.2)mm和(1.7±1.4)mm,对照组分别为(2.8±2.1)mm、(3.9±2.2)mm和(2.7±2.4)mm,两组差异具有统计学意义(P<0.05)。实验组前后、上下和左右方向的CTV-PTV边界分别为5.27 mm、8.54 mm和5.23 mm,对照组分别为8.47 mm、11.29 mm和8.43 mm。结论 在采用高精度技术治疗宫颈癌时,每周kV-CBCT是一种令人满意的精确定位方法,有助于减少CTV-PTV边界。

Objective To obtain the best cervical cancer treatment benefit through kilovoltage cone-beam CT (kV-CBCT) positioning, by using high-precision external beam therapy technology, that is, image-guided radiation therapy/volumetric modulated arc therapy (IGRT/VMAT). Methods Two hundred and five patients with cervical cancer treated with IGRT/VMAT were included in the experimental group. After kV-CBCT positioning once a week, these images were matched with the planned CT scan images and the setup errors were recorded. A total of 1 025 kV-CBCT images were studied. Ninety patients with cervical cancer positioned by conventional X-ray during the same period were selected as the control group. The boundary of the planned target volume (PTV) was calculated based on the setup errors. Results In the experimental group, the setup errors in the anteroposterior, superoinferior and mediolateral direction were (1.8±1.1) mm, (2.8±2.2) mm, and (1.7±1.4) mm, respectively. And in the control group, the setup errors were (2.8±2.1) mm, (3.9±2.2) mm, and (2.7±2.4) mm, respectively. The differences between the two groups were statistically significant (P<0.05). In the experimental group, the CTV-PTV boundaries in the anteroposterior, superoinferior and mediolateral direction were 5.27 mm, 8.54 mm, and 5.23 mm, respectively. And in the control group, the CTV-PTV boundaries were 8.47 mm, 11.29 mm, and 8.43 mm, respectively. Conclusion When using high-precision technology to treat cervical cancer, weekly kV-CBCT is a satisfactory and accurate positioning method, which helps to reduce the CTV-PTV boundary.

目的 研究PF诱导化疗联合调强放疗及二维放疗对鼻咽癌近远期疗效影响的回顾性分析。方法 回顾性分析2008年1月—2008年12月中山大学附属肿瘤医院收治的101例鼻咽癌患者治疗情况,按照治疗方案技术分为调强组(n=42)和二维组(n=59)。比较两组患者临床疗效,近期毒副反应及生存情况。结果 放疗结束时调强组患者总缓解率92.86%与二维组77.97%比较差异有统计学意义(P<0.05)。调强组Ⅲ-Ⅳ级胃肠道反应26.19%及黏膜炎14.29%发生率与二维组比较显著较少,差异有统计学意义(P<0.05)。两组患者远期毒副反应及生存率比较无显著差异(P>0.05)。结论 PF诱导化疗联合调强放疗治疗鼻咽癌患者,近远期临床疗效好,毒副反应少。

Objective To study the effects of PF induced chemotherapy combined with intensity modulated radiation therapy and two-dimensional radiotherapy on the short and long term curative effects in nasopharyngeal carcinoma. Methods The treatment condition of 101 cases of patients with nasopharyngeal carcinoma who were treated in the Tumor Hospital Affiliated to San Yat-sen University between January and December 2008 were retrospectively analyzed. According to different treatments, the cases were divided into the intensity modulated group and the two-dimensional group. The clinical curative effects, short-term toxic and side effects and survival status were compared between the two groups. Results At the end of radiotherapy, the total remission rate in the intensity modulated group was 92.86% while in the two-dimensional group was 77.97% (P<0.05). In the intensity modulated group, the incidence rates of grade Ⅲ-Ⅳgastrointestinal tract reactions (26.19%) and mucositis (14.29%) were significantly lower than those in the two-dimensional group (P<0.05). There was no significant difference in long-term side effects and survival rate between the two groups (P>0.05). Conclusion PF induced chemotherapy combined with intensity modulated radiation therapy in the treatment of patients with nasopharyngeal carcinoma has good short and long-term curative effects and few toxic and side effects.

目的 分析立体定向体部放射治疗(SBRJ)应用于孤立性肺肿瘤的疗效,探讨其临床价值。方法 采用拓能(TOPSLANE)全身X线立体定向放射治疗系统治疗15例孤立性肺肿瘤患者,其中I期非小细胞肺癌患者8例,单个肺转移瘤患者7例。单次剂量为5~8Gy／次,每天1次,每周3次,共8~10次,总剂量50~64Gy,生物有效剂量(BED)75~115Gy。分析治疗的近期疗效、急性放射损伤和局部控制率。结果 3例患者完全缓解(20.0%),10例患者部分缓解(66.7%),2例患者病灶稳定(13.3%),没有疾病进展的患者。15例患者总有效率为86.7%(13/15)。BED<90Gy的患者有效率为33.3%,而BED>90Gy的患者有效率为100%,差异有统计学意义(P＜0.05)。3例患者出现2级急性放射损伤,未见3级以上毒副反应。1年和2年局控率分别为92.3%和81.2%。结论 SBRT治疗孤立性肺肿瘤可获得较好的近期疗效和局部控制率,急性放射损伤较轻。

Objective To analyze the efficacy of stereotactic body radiation therapy(SBRT) onsolitary pulmonary tumor and explore its clinical value. Methods TOPSLANE X-ray stereotactic body radiation therapy system was used for treatment of fifteen patients with solitary pulmonary tumor, including eight patients with stage I non-small cell lung cancer and seven patients with single lung metastasis. Fraction dose of 5 to 8Gy was prescribed once a day, three times a week, totally 8 to 10 times to a total dose of 50 to 64 Gy and biological effective dose(BED) of 75 to 115Gy. Short-term efficacy, acute radiation injury and local control rate were analyzed. Results After treatment, there were three patients with complete response (CR) (20.0%), ten patients with partial response (PR) (66.7%), tow patients with stable disease (SD) (13.3%), and no patients with progressive disease (PD). The total response rate was 86.7% (13/15). The response rate was 33.3% in patients with BED <90 Gy, while it was 100% in patients with BED> 90 Gy, and the difference was statistically significant (P<0.05). Grade 2 acute radiation injuries were observed in three patients, and no toxicity greater than grade 3 was observed. The 1-year and 2-year local control rate was 92.3% and 81.2%, respectively. Conclusion SBRT on solitary pulmonary tumor has good short-term efficacy and local control rate with mild acute radiation injury.

目的 探索复发性卵巢癌放射治疗临床的效果和副作用。方法 采用回顾性分析中山大学肿瘤防治中心放射治疗中心2002年1月—2014年9月收治的复发性卵巢癌采用放射治疗的临床资料和治疗结果。结果 23例患者5年生存率为48.6%,中位生存期为54,局部无瘤生存期中位数为11.9。结论 对于局限性复发性卵巢癌放射治疗有较好的疗效和较少的副作用。

Objective To explore the clinical efficacy and side effects of radiation therapy for recurrent ovarian cancer. Methods We performed a retrospective analysis of clinical data and treatment outcomes from recurrent ovarian cancer patients who received radiation therapy from January 1999 to December 2012 at radiation treatment center of Sun Yat-sen university Cancer Center. Results Among 23 patients, the five-year survival rate was 48.6%, the median survival time was 54, and the local median disease-free survival was 11.9. Conclusion Radiation therapy has better efficacy and less side effects for non-metastatic recurrent ovarian cancer.

       目的   探讨与分析实时图像引导系统对乳腺癌保乳术后放射治疗（放疗）摆位误差的影响。方法   选取安阳市肿瘤医院2021年9月—2023年12月收治的乳腺癌保乳术后108例患者为研究对象，按照随机信封抽签法把108例患者分为实时组54例与对照组54例。两组的放疗观察时间均为3个月，对照组给予热塑体模定位，实时组给予实时图像引导系统定位，记录两组的摆位误差与放疗不良反应发生情况。结果   实时组X轴、Y轴、Z轴方向的配准结果误差发生率分别为1.85%、7.41%、1.85%，均低于对照组的14.81%、22.22%、16.67%（χ ² =5.939，P=0.015；χ ² =4.696，P=0.030；χ ² =7.053，P=0.008）。实时组摆位纠正前X轴、Y轴、Z轴误差大于对照组（t分别为38.888、28.106、50.102，P＜0.05），摆位纠正后两组摆位误差对比差异无统计学意义（P＞0.05）。实时组放疗3个月期间的心脏平均受量、肺脏平均受量均少于对照组（t分别为49.942、13.996，P＜0.001）。实时组放疗3个月期间的急性放射性皮肤反应发生率为3.70%，对照组为16.67%，实时组低于对照组（χ ² =4.960，P＜0.05）。结论   实时图像引导系统在乳腺癌保乳术后放疗的应用可减少摆位误差，也能减少患者的心脏平均受量、肺脏平均受量，降低急性放射性皮肤反应发生率。

       Objective  To investigate and analysis the effects of image-guided radiation therapy on the positioning error of radiotherapy after breast conserving surgery for breast cancer．Methods  from September 2021 to December 2023，108 patients with breast cancer after breast conserving surgery in Anyang Cancer Hospital were selected as the study subjects．According to the principle of random envelope drawing，108 patients were divided into the real-time group of 54 patients and the control group of 54 patients．The observation time for radiotherapy in both groups was 3 months．The control group was given thermoplastic phantom positioning，while the real-time group was given image-guided radiation therapy positioning．The positioning errors and incidence of radiotherapy adverse reactions were recorded in both groups．Results  The error rates of registration results in the X-axis，Y-axis，and Z-axis directions of the real-time group were 1.85%，7.41% and 1.85%，respectively，which were significantly lower than the control group（14.81%，22.22% and 16.67%；χ ² =5.939，P=0.015；χ ² =4.696，P=0.030；χ ² =7.053，P=0.008）．The errors in the X-axis，Y-axis and Z-axis before the pendulum correction were greater than that in the control group（t=38.888，28.106，50.102，P＜0.05），and there were no statistically significant difference in positioning errors compared between the two groups after positioning correction（P＞0.05）．The average cardiac and lung uptake during the 3-month period of real-time radiotherapy in the group were significantly lower than those in the control group（t=49.942，13.996，P＜0.001）．The incidence of acute radiation-induced skin reactions during the 3-month period of real-time group radiotherapy was 3.70%，compared to 16.67% in the control group，the real-time group showed a significant decrease（χ ² =4.960，P=0.026＜0.05）．Conclusions  The application of image-guided  radiation therapy in radiotherapy after breast conserving surgery for breast cancer can reduce the positioning error，the average cardiac and pulmonary dose，and the incidence of acute radiation skin reaction．