放射治疗（放疗）可以提高妇科恶性肿瘤患者的总体生存率，降低复发率，增加手术机会。但肿瘤周围的健康组织不可避免地会进入电离辐射区域从而导致阴道狭窄、缩短和失去弹性，文章结合近年来国内外的放疗后阴道损伤治疗方式进行综述，总结分析治疗的优缺点，旨在为放疗后阴道损伤的临床治疗提供帮助。

       Radiotherapy can improve the overall survival rate，reduce the  recurrence  rate and increase the chance of surgery in patients with gynecological malignant tumors．However，the healthy tissue around the tumor can inevitably be included the ionizing radiation area，resulting in vaginal stenosis，shortening and loss of elasticity．This paper reviews the treatment methods of post-radiotherapy vaginal injury at home and abroad in recent years，to summarize and analyze theadvantages and disadvantages of treatment，aiming to provide help for the clinical treatment of post-radiotherapy vaginal injury．

       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．

       目的   研究核磁共振（MR）引导的海马保护技术应用于小细胞肺癌全脑放射治疗（放疗）的效果。方法  对确定行全脑放疗的30例小细胞肺癌脑转移患者，行常规放疗CT定位后以定位体位行全头颅MR平扫，将计算机断层扫描（CT）和MR的T1加权像在Monaco 5.1计划系统上进行精准融合，勾画全脑放疗及海马区域，在海马区域三维方向上分别外扩5、15 mm作为海马与计划靶区之间的剂量跌落，每一例患者在Monaco 5.1计划系统上按照不保护海马组织以及外扩5、15 mm进行保护设计3个容积旋转调强技术（VMAT）放疗计划，观察海马组织的平均及最大放疗剂量。结果  增加保护海马组织之后，3个放疗计划的D100均≥95%，每例的3个放疗计划间D100比较差异无统计学意义（P＞0.05）；设置外扩5、15 mm的剂量跌落区后，左、右海马的平均剂量、最大剂量均明显降低，而且3个放疗计划的海马平均剂量、最大剂量之间对比差异有统计学意义。结论   小细胞肺癌脑转移患者进行全脑放疗时，利用MR引导的海马保护技术并设置外扩15 mm的剂量跌落区，能够显著降低海马的剂量，达到保护目的。

       Objective  To explore the application of MR guided hippocampal avoidant whole brain radiotherapy（WBRT）for small cell lung cancer（SCLC）．Methods  Thirty SCLC patients with brain metastases who underwent WBRT were enrdled．After routine CT localization was performed，and a head MR was performed in a the same position．T1 weighted images of MR and CT images were accurately fused on the Monaco 5.1 planning system．The entire brain tissue and hippocampus region were delineated．The dose drop areas between the hippocampusand the planned target area were expanded 5mm and 15mm in the three-dimensional direction of the hippocampus，respectively．Three volumetric modulated arc therapy（VMAT）radiotherapy plans were designed for each patient on the Monaco 5.1 planning system based on whether the hippocampal tissue was avoid．The average and maximum doses of hippocampal tissue were observed．Results  After the avoidance of hippocampal tissue，the D100 of the three radiotherapy plans reached ≥95%，and there was no significant difference in D100 between the three radiotherapy plans in each case．After setting dose drop areas of 5mm and 15mm for external expansion，the average and maximum doses of the left and right hippocampus were significantly reduced，and there was a significant difference in the comparison between the average and maximum doses in the hippocampus of the three radiotherapy plans．Conclusions  MR guided hippocampal avoidant technology and the setting of a 15 mm dose drop area can significantly reduce the dose to the hippocampus in patients with SCLC undergo whole brain radiotherapy．