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IF 3 3区 医学 Q2 ONCOLOGY Pub Date : 2025-09-16 DOI: 10.1016/S0936-6555(25)00195-5
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引用次数: 0
RCR Meetings 软的会议
IF 3 3区 医学 Q2 ONCOLOGY Pub Date : 2025-09-16 DOI: 10.1016/S0936-6555(25)00194-3
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引用次数: 0
Oncoflash—Research Updates in a Flash! oncoflash -研究更新在一个闪光!
IF 3 3区 医学 Q2 ONCOLOGY Pub Date : 2025-09-16 DOI: 10.1016/j.clon.2025.103932
D. Shor , K. Thippu Jayaprakash
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引用次数: 0
Evaluation of Radiotherapy Plan Robustness: A Systematic Literature Review 放疗计划稳健性评价:系统文献综述。
IF 3 3区 医学 Q2 ONCOLOGY Pub Date : 2025-09-15 DOI: 10.1016/j.clon.2025.103938
S. Kim , D. Bernstein , A. Taylor

Aims

Advances in radiotherapy have led to increasingly conformal and complex treatment plans. The progressive reduction in safety margins around the target volume and the increased use of hypofractionated radiotherapy further heighten their vulnerability to systematic geometric uncertainties, which may compromise target volume coverage and increase doses to normal tissues. Evaluating treatment plan robustness, therefore, is crucial to ensuring the safe and effective delivery of radiotherapy. This systematic literature review provides a comprehensive overview of current practices for assessing treatment plan robustness across radiotherapy modalities.

Materials and Methods

A Pubmed search was conducted for studies published up to July 2025 that evaluated plan robustness.

Results

Of 287 publications, 225 met the inclusion criteria. Most studies (173 of 225) focused on proton therapy, with setup (198 studies) and range (184 studies) being the most commonly considered uncertainties. Robustness evaluation methods varied widely and were categorised as dose-volume histogram (DVH)-based, voxel-based and radiobiological metrics. The most commonly used method for evaluating plan robustness involved visualising DVHs by overlapping those from multiple uncertainty scenarios to represent all possible variations. Frequently used dosimetric parameters for clinical target volume (CTV) coverage included variations of CTV D95%, D98% and V95% and the proportion of scenarios in which CTV D98%>95%. Voxel-based metrics, such as Max-Min dose distributions and voxel-wise dose reconstructions, provided spatial information on areas susceptible to uncertainties. Radiobiological metrics assessed robustness through changes in tumour control and normal tissue complication probabilities, highlighting the clinical impact of dose variations arising from uncertainty scenarios.

Conclusion

Currently, there is no international consensus on evaluating plan robustness. We recommend combining DVH-based metrics with spatially informative voxel-based approaches. Establishing a standardised framework for robustness evaluation, along with integrating commercial robust evaluation software tools that enable the generation of these metrics, will be essential for its adoption in clinical practice.
目的:放射治疗的进步导致越来越多的适形和复杂的治疗方案。靶体积周围安全边界的逐渐减小和低分割放疗的增加使用进一步增加了它们对系统几何不确定性的脆弱性,这可能损害靶体积的覆盖范围并增加对正常组织的剂量。因此,评估治疗计划的稳健性对于确保放射治疗的安全有效递送至关重要。这一系统的文献综述提供了评估治疗计划稳健性的当前实践的全面概述。材料和方法:对2025年7月之前发表的评估计划稳健性的研究进行了Pubmed检索。结果:287篇文献中,225篇符合纳入标准。大多数研究(225项研究中的173项)集中在质子治疗上,最常见的不确定性是设置(198项研究)和范围(184项研究)。鲁棒性评估方法差异很大,分为基于剂量-体积直方图(DVH)、基于体素和放射生物学指标。评估计划鲁棒性最常用的方法是通过重叠来自多个不确定性情景的dvh来可视化dvh,以表示所有可能的变化。临床靶体积(CTV)覆盖率常用的剂量学参数包括CTV D95%、D98%和V95%的变化,以及CTV D98%和bb0 95%的情况比例。基于体素的度量,如最大-最小剂量分布和体素剂量重建,提供了易受不确定性影响区域的空间信息。放射生物学指标通过肿瘤控制和正常组织并发症概率的变化来评估稳健性,强调了不确定情景引起的剂量变化的临床影响。结论:目前国际上对计划稳健性评价尚无共识。我们建议将基于dvh的度量与基于空间信息体素的方法相结合。建立一个标准化的稳健性评估框架,以及集成商业稳健性评估软件工具,使这些指标能够生成,对于在临床实践中采用它是至关重要的。
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引用次数: 0
Magnetic Resonance Imaging Based Delineation in Head and Neck Cancers: Balancing Coverage and Toxicity 基于磁共振成像的头颈部肿瘤描述:平衡覆盖范围和毒性
IF 3 3区 医学 Q2 ONCOLOGY Pub Date : 2025-09-13 DOI: 10.1016/j.clon.2025.103941
S. Haider
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引用次数: 0
RT-HaND_C: A Multi-Source, Validated Real-world Head and Neck Cancer Dataset for Research RT-HaND_C:一个多来源,验证的真实世界头颈癌研究数据集
IF 3 3区 医学 Q2 ONCOLOGY Pub Date : 2025-09-11 DOI: 10.1016/j.clon.2025.103935
T. Young , H. Drake , V. Butterworth , W. Wulaningsih , B. Dann , A. Giemza , E. Ivy , D. Adjogatse , K. Sambasivan , I. Petkar , M. Reis Ferreira , A. Kong , M. Lei , L. Collins , A. King , D. Vilic , T.G. Urbano

Aims

Real-world data (RWD) are a valuable resource for head and neck cancer (HNC) research, offering insights into outcomes among diverse, comorbid patients who are often underrepresented in clinical trials. However, RWD pose challenges, including data quality and requires rigorous evaluation before being used to generate real-world evidence. We aimed to develop a large HNC oncology dataset containing comprehensive clinical data.

Methods

We developed RT-HaND_C, a multi-source clinical dataset integrating structured Electronic Health Record (EHR) data, unstructured EHR data extracted using a previously validated AI-driven Natural Language Processing tool, and manually curated datasets. RT-HaND_C incorporates extensive demographic, disease, laboratory, treatment, outcome (disease and toxicity) and radiotherapy dosimetry data for all HNC oncology patients seen at our centre (2010–2023). The dataset underwent rigorous evaluation for accuracy, completeness and consistency. We evaluated usability by addressing the unanswered question of long-term weight trends post-radical HNC radiotherapy.

Results

The retrospective cohort comprises 2,895 HNC patients with over 1.9 million data points across over 2000 data categories. Accuracy assessments exceeded 98% for most variables. High data completeness and consistency were observed for all key data categories. Dataset usability testing showed rapidly extractable and analysable data, with data demonstrating that HNC patients experienced statistically significant weight loss persisting at 5 years post-radical radiotherapy (even when accounting for disease recurrence), with peak weight loss observed at 6 months post-radiotherapy.

Conclusions

RT-HaND_C represents a novel, high-quality RWD resource and evaluation framework. RT-HaND_C is virtually linked to corresponding diagnostic and radiotherapy imaging data to facilitate multi-modal research. The dataset is available for research and collaboration, with ongoing work focused on enhancing completeness and incorporating prospective updates.
真实世界数据(RWD)是头颈癌(HNC)研究的宝贵资源,为临床试验中往往代表性不足的各种合并症患者的结果提供了见解。然而,RWD带来了挑战,包括数据质量,在用于生成真实世界的证据之前需要进行严格的评估。我们的目标是开发一个包含全面临床数据的大型HNC肿瘤学数据集。方法我们开发了RT-HaND_C,这是一个多源临床数据集,集成了结构化电子健康记录(EHR)数据、使用先前经过验证的人工智能驱动的自然语言处理工具提取的非结构化电子健康记录数据以及手动整理的数据集。RT-HaND_C包含了我们中心所有HNC肿瘤患者(2010-2023年)的广泛人口统计、疾病、实验室、治疗、结果(疾病和毒性)和放疗剂量学数据。对数据集的准确性、完整性和一致性进行了严格的评估。我们通过解决根治性HNC放疗后长期体重趋势的悬而未决的问题来评估可用性。结果回顾性队列包括2895例HNC患者,超过2000个数据类别的190万个数据点。大多数变量的准确率评估超过98%。所有关键数据类别的数据完整性和一致性均较高。数据集可用性测试显示了可快速提取和分析的数据,数据表明,HNC患者在根治性放疗后5年(即使考虑到疾病复发)持续出现统计学上显着的体重减轻,在放疗后6个月观察到体重减轻高峰。结论srt - hand_c是一种新颖、高质量的RWD资源和评价框架。RT-HaND_C实际上与相应的诊断和放疗成像数据相关联,以促进多模式研究。该数据集可用于研究和合作,正在进行的工作重点是提高完整性和纳入前瞻性更新。
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引用次数: 0
Optimisation of Margin Adaptation for Respiratory Motion in Lung Cancer Stereotactic Body Radiation Therapy Using Virtual Four-dimensional Volumetric Modulated Arc Therapy System Radiotherapy 利用虚拟四维体积调制弧线治疗系统优化肺癌立体定向放射治疗中呼吸运动的边缘适应。
IF 3 3区 医学 Q2 ONCOLOGY Pub Date : 2025-09-11 DOI: 10.1016/j.clon.2025.103934
D. Kawahara , H. Masuda , T. Wada , M. Kishi , T. Katsuta , N. Imano , Y. Murakami

Aim

This study applies a previously developed four-dimensional (4D) dose calculation method using virtual four-dimensional computed tomography (v4DCT) to evaluate and optimise the use of an optimal margin (OM) in lung stereotactic body radiation therapy (SBRT). Specifically, we assess the clinical feasibility of an OM derived from different prescription isodose levels and its impact on target coverage and normal tissue sparing.

Materials and Methods

Volumetric modulated arc therapy (VMAT) plans were created using a whole-body phantom with a virtual lung tumour. Treatment planning ensured that 95% of the planning target volume (PTV) was covered by the prescription isodose lines for 70%, 75%, and 80%. v4DCT images were generated assuming free breathing. The four-dimensional radiotherapy (v4DRT) dose represented the accumulated dose across all respiratory phases. The dosimetric internal margin (DIM) was defined as the maximum amplitude ensuring D100% and D99% coverage of the gross tumour volume (GTV). The OM was determined based on the average dose to the GTV and the dose to organs at risk (OARs) for the 70% to 80% isodose plans.

Results

The DIM was determined to be 2.0 to 2.6 times larger than the conventional margin accounting for respiratory motion. Implementation of the optimised margin resulted in a significant reduction of the V20Gy for normal lung tissue under respiratory motion conditions. Additionally, the maximum dose at distances of 0.5 to 2.0 cm from the PTV showed a reduction with larger amplitudes. The OM with 70% and 75% isodose plan achieved a 55% to 62% reduction compared to the conventional PTV margin with 80% isodose plan.

Conclusion

This study proposes an OM for lung SBRT with marginal prescription. This approach reduced the respiratory motion margin by 55% to 62% while maintaining target dose coverage and lowering OAR exposure.
目的:本研究应用先前开发的四维(4D)剂量计算方法,使用虚拟四维计算机断层扫描(v4DCT)来评估和优化肺立体定向全身放射治疗(SBRT)中最佳裕度(OM)的使用。具体而言,我们评估了来自不同处方等剂量水平的OM的临床可行性及其对靶覆盖和正常组织保留的影响。材料和方法:体积调制弧线治疗(VMAT)计划是使用一个带有虚拟肺肿瘤的全身幻影来创建的。治疗计划确保95%的计划目标体积(PTV)被70%、75%和80%的处方等剂量线覆盖。假设自由呼吸生成v4DCT图像。四维放射治疗(v4DRT)剂量代表所有呼吸期的累积剂量。剂量学内缘(DIM)定义为确保肿瘤总体积(GTV) D100%和D99%覆盖的最大振幅。根据70%至80%等剂量计划对GTV的平均剂量和对危险器官(OARs)的剂量确定OM。结果:考虑到呼吸运动,DIM比传统的边缘大2.0 ~ 2.6倍。在呼吸运动条件下,实现优化的边缘导致正常肺组织的V20Gy显著降低。此外,距离PTV 0.5 ~ 2.0 cm处的最大剂量下降幅度较大。70%和75%等剂量方案的OM比80%等剂量方案的常规PTV边际减少了55%至62%。结论:本研究提出了一种边缘处方肺SBRT的OM。该方法在保持目标剂量覆盖和降低桨叶暴露的同时,将呼吸运动幅度降低了55%至62%。
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引用次数: 0
Radiating Excellence: A Decade of Pioneering Radiotherapy Trials and Collaborative Leadership at Leeds Cancer Research UK Clinical Trials Unit 辐射卓越:十年的开创性放疗试验和协作领导在利兹癌症研究英国临床试验单位。
IF 3 3区 医学 Q2 ONCOLOGY Pub Date : 2025-09-10 DOI: 10.1016/j.clon.2025.103937
F. Slevin , E.M. Hudson , A. Hockaday , J. Kendall , S. Noutch , J.B. Oughton , A. Smith , J.C. Webster , D. Sebag-Montefiore , S.R. Brown
Recently, there has been considerable development in radiotherapy technologies and novel drug-radiotherapy combinations, with the potential to develop more effective and less toxic treatments for patients. There is a need to evaluate these approaches through clinical trials, and clinical trials units (CTUs) are ideally positioned to design and deliver these studies. Over the past 10 years, the Leeds Cancer Research UK CTU has developed a flagship portfolio of radiotherapy clinical trials, which encompass novel drug-radiotherapy combinations, radiotherapy technologies and optimising radiotherapy dose. Key to the success of the portfolio has been an emphasis on multidisciplinary collaborations, career development of future leaders in clinical trials, understanding the funding landscape, engagement with discovery and translational scientists, and keeping patients at the heart of our research. Moving forward, the priorities of the CTU are to build on this strong foundation with a pipeline of impactful and scientifically rich clinical trials, which will continue to shape the radiotherapy research landscape.
近年来,放射治疗技术和新型药物-放射治疗组合有了长足的发展,有可能为患者开发出更有效、毒性更小的治疗方法。有必要通过临床试验来评估这些方法,而临床试验单位(ctu)是设计和提供这些研究的理想定位。在过去的10年里,英国利兹癌症研究中心CTU已经开发了放射治疗临床试验的旗舰产品组合,其中包括新的药物-放射治疗组合,放射治疗技术和优化放射治疗剂量。该组合成功的关键是强调多学科合作、临床试验未来领导者的职业发展、了解资助情况、与发现和转化科学家的接触,以及将患者置于我们研究的核心。展望未来,CTU的首要任务是在这个坚实的基础上建立有影响力和科学丰富的临床试验管道,这将继续塑造放疗研究的前景。
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引用次数: 0
Optimization and Quality Assurance of VMAT-Driven Lattice Radiotherapy in Large Tumors Across Anatomical Sites vmat驱动的点阵放疗在大肿瘤跨解剖部位的优化和质量保证
IF 3 3区 医学 Q2 ONCOLOGY Pub Date : 2025-09-10 DOI: 10.1016/j.clon.2025.103936
A.K. Singh , S. Singh , S. Sen , A. Vijay , Dipesh , M. Bhushan , Mahipal , M. Omar

Aims

This study investigates the feasibility, dosimetric optimization, and validation of VMAT-based Lattice Radiotherapy (LRT) across head and neck, thoracic, and abdominal tumors using TrueBeam STx(Varian Medical Systems).

Materials and methods

60 patients with gross tumor volumes (GTVs) >550 cc and ≥10 lattice vertices were included. Planning CTs were acquired using a Siemens Somatom go.Sim. VMAT plans were generated in Eclipse (v15.1) with 6 MV FFF beams, using HD120 MLCs. Each spherical high-dose vertex received 20 Gy in 5 fractions. Optimization incorporated concentric dose rings (C1–C3) for valley dose control. Dosimetric parameters evaluated included D95%, Dmean, D50%, Homogeneity Index (HI), and Peak-to-Valley Dose Ratio (PVDR). Validation was performed using OSLDs in a Rando phantom and ArcCHECK gamma analysis (3%/3 mm).

Results

Abdominal tumors showed the highest spatial modulation, with axial VPDR reaching 0.62, compared to 0.47 in head and neck and thoracic sites. Abdominal sphere doses exhibited the lowest standard deviation (Dmean = 2113.8 ± 47.1 cGy). Head and neck cases required higher modulation intensity (MU/deg = 3.8) due to OAR proximity, while abdominal cases required reduced gantry speeds (1.2°/sec) for sharper dose gradients. Gamma pass rates exceeded 96% across all sites, confirming delivery accuracy.

Conclusion

VMAT-guided LRT provides robust peak-to-valley dose modulation and reproducible high-dose vertex delivery for large tumors. Anatomical location significantly affects vertex geometry, modulation requirements, and dosimetric outcomes. Abdominal plans demonstrated superior uniformity and spatial separation, whereas head and neck cases demanded more complex optimization. Standardized planning protocols and rigorous QA are essential for safe clinical translation of LRT.
目的:本研究探讨了使用TrueBeam STx(Varian Medical Systems)对头颈部、胸部和腹部肿瘤进行基于vmat的点阵放疗(LRT)的可行性、剂量学优化和验证。材料与方法入选肿瘤总体积(gtv)≥550 cc、格点≥10个的患者60例。使用西门子Somatom go.Sim获取计划ct。在Eclipse (v15.1)中使用HD120 mlc生成6 MV FFF波束的VMAT图。每个球形高剂量顶点分5次接受20 Gy。优化采用同心剂量环(C1-C3)进行谷剂量控制。评估的剂量学参数包括D95%、Dmean、D50%、均匀性指数(HI)和峰谷剂量比(PVDR)。在Rando幻影和ArcCHECK伽马分析(3%/3 mm)中使用osld进行验证。结果腹部肿瘤表现出最高的空间调节,轴向VPDR达到0.62,而头颈部和胸部的VPDR为0.47。腹部球体剂量的标准差最低(Dmean = 2113.8±47.1 cGy)。头部和颈部病例需要更高的调制强度(MU/度= 3.8),因为桨叶接近,而腹部病例需要降低龙门架速度(1.2°/秒),以获得更大的剂量梯度。所有站点的伽马通过率超过96%,确认了交付的准确性。结论vmat引导下的LRT对大肿瘤具有稳定的峰谷剂量调制和可重复的高剂量顶点递送。解剖位置显著影响顶点几何形状、调制要求和剂量学结果。腹部平面图表现出优越的均匀性和空间分隔,而头颈部病例则需要更复杂的优化。标准化的计划方案和严格的质量保证对于LRT的安全临床翻译至关重要。
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引用次数: 0
Clinical Evaluation of Stereotactic Ablative Radiotherapy for Oligometastases From Rare Primary Cancers 立体定向消融放疗治疗罕见原发肿瘤少转移的临床评价。
IF 3 3区 医学 Q2 ONCOLOGY Pub Date : 2025-08-30 DOI: 10.1016/j.clon.2025.103931
R. Talwar , J. Duong , P. Nariyangadu , P. Hoskin , A. Stewart-Lord , N. Shah , P. Ostler , M. Harrison , A. Vinayan , S. Dubash , Y. Tsang

Aims

Stereotactic ablative body radiotherapy (SABR) has emerged as a promising treatment modality for oligometastatic disease from primary breast, prostate, lung, and colorectal cancers. However, there is a paucity of information on clinical outcomes of SABR to oligometastases from rare primary cancers (RPCs). This study aimed to report the treatment outcomes and to investigate what factors are prognostic in terms of overall survival (OS) and progression-free survival (PFS) in patients receiving SABR for oligometastases from RPCs.

Methods and materials

All patients with oligometastases from any RPCs were included in this retrospective review of patients treated with SABR at one single institution. This cohort excluded breast, prostate, lung, colon, and rectum primary cancer. OS and PFS were calculated using Kaplan-Meier statistics and post-SABR toxicities were scored following the Common Terminology Criteria for Adverse Events (CTCAE) v. 4.0. An analysis of prognostic factors for OS and PFS was performed based on log-rank tests which were used for the analysis of prognostic factors for OS and PFS based on the site of primary cancer, previous radiotherapy status, previous systemic therapy status, the number of oligometastases, SABR treatment site, biological equivalent dose, total size of gross tumour volume, and planning target volume (PTV).

Results

A total of 114 patients with 126 metachronous oligometastatic lesions from RPC receiving SABR were included. The median patient age when they received SABR was 66.7 years (range: 22.3-91.8 years), with the median follow-up of the cohort being 21.7 months (range: 2.8-75.8 months). The estimated median OS was 40.1 months (95% confidence interval [CI]: 27.5-52.6 months), and the estimated median PFS was 14.2 months (95% CI: 11.0-17.5 months). The treatment was well tolerated, with the majority of patients experiencing only grade 1 fatigue as the most common acute toxicity. The previous radiotherapy status (P = 0.04) and cumulative PTV (P = 0.01) were identified as statistically significant independent predictors of OS. For PFS, SABR treatment site (P = 0.03) was the only statistically significant independent predictor.

Conclusion

There are limited studies published on the efficacy and post-treatment toxicities of using SABR in the management of oligometastases from RPC. This study confirmed that SABR was a safe, noninvasive treatment option for patients with extracranial oligometastases originated from RPC in terms of the favourable post-treatment toxicities.
目的:立体定向消融体放疗(SABR)已成为原发性乳腺癌、前列腺癌、肺癌和结直肠癌等低转移性疾病的一种有前景的治疗方式。然而,关于SABR对罕见原发癌症(rpc)低转移灶的临床结果的信息缺乏。本研究旨在报告治疗结果,并调查哪些因素对RPCs低转移性SABR患者的总生存期(OS)和无进展生存期(PFS)具有预后影响。方法和材料:在同一家机构接受SABR治疗的患者中,所有来自任何rpc的低转移患者都被纳入这项回顾性研究。该队列排除了乳腺癌、前列腺癌、肺癌、结肠癌和直肠原发癌。使用Kaplan-Meier统计计算OS和PFS,并根据不良事件通用术语标准(CTCAE) v. 4.0对sabr后毒性进行评分。基于log-rank检验对OS和PFS的预后因素进行分析,log-rank检验用于分析OS和PFS的预后因素,基于原发肿瘤部位、既往放疗状态、既往全身治疗状态、寡转移灶数量、SABR治疗部位、生物等效剂量、总肿瘤体积大小和计划靶体积(PTV)。结果:114例126例异时性少转移性RPC病变接受SABR治疗。患者接受SABR时的中位年龄为66.7岁(范围:22.3-91.8岁),队列的中位随访时间为21.7个月(范围:2.8-75.8个月)。估计中位OS为40.1个月(95%置信区间[CI]: 27.5-52.6个月),估计中位PFS为14.2个月(95% CI: 11.0-17.5个月)。治疗耐受性良好,大多数患者仅经历1级疲劳,这是最常见的急性毒性。既往放疗状态(P = 0.04)和累计PTV (P = 0.01)是OS的独立预测因子,具有统计学意义。对于PFS, SABR治疗部位(P = 0.03)是唯一具有统计学意义的独立预测因子。结论:关于使用SABR治疗RPC低转移瘤的疗效和治疗后毒性的研究有限。本研究证实,就治疗后毒性而言,SABR是一种安全、无创的治疗选择,适用于RPC源性颅外低转移患者。
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引用次数: 0
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Clinical oncology
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