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Low versus high dose of postoperative radiotherapy for locally advanced esophageal squamous cell carcinoma: a propensity score‐matched analysis 局部晚期食管鳞状细胞癌术后低剂量与高剂量放疗的倾向评分匹配分析
Q4 Medicine Pub Date : 2023-04-19 DOI: 10.1002/pro6.1192
Qiwei Yao, Hongying Zheng, Shuyun Huang, M. Lin, Jun Yang, Jiancheng Li
This study aimed to investigate the effect of different postoperative radiotherapy doses on the prognosis of patients with esophageal squamous cell carcinoma (ESCC).
本研究旨在探讨不同放疗剂量对食管鳞状细胞癌(ESCC)患者术后预后的影响。
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引用次数: 0
Application of radiomics in lung immuno‐oncology 放射组学在肺部免疫肿瘤学中的应用
Q4 Medicine Pub Date : 2023-04-04 DOI: 10.1002/pro6.1191
Weisi Yan, C. Quan, Mourad Waleed, Jianda Yuan, Zheng Shi, Jun Yang, Qiuxia Lu, J Zhang
Radiomics is a rapidly evolving field of research that extracts and analyzes quantitative features within medical images. Those features are termed as radiomic features that can characterize a tumor in a comprehensive and quantitative manner with regard to its internal structure and heterogeneity. Radiomic features can be used, alone or in combination with demographic, histological, genomic, or proteomic data, for predicting prognosis or treatment response. Immunotherapy, or immune‐oncology, is the study of cancer treatment by taking advantage of the body's immune system to prevent, control, and eliminate cancer. In this review, we first provide a brief introduction to both radiomics and immune‐oncology in lung cancer. Then, we discuss the need for developing immune‐oncology biomarkers, and the advantages of radiomics in identifying biomarkers related to immunotherapy. We also discuss potential areas in and out of tumors, such as the intra‐tumoral hypoxic region and tumor microenvironment, where radiomic markers might be extracted, as well as a potential application of radiomic biomarkers in clinical lung cancer management. Finally, we present radiation and immune modulation in non‐small cell lung cancer, clinical trials and their design to incorporate radiomic biomarkers, and radiomics‐guided precision radiation therapy.
放射组学是一个快速发展的研究领域,提取和分析医学图像中的定量特征。这些特征被称为放射学特征,它可以对肿瘤的内部结构和异质性进行全面和定量的描述。放射组学特征可以单独使用,也可以与人口统计学、组织学、基因组学或蛋白质组学数据结合使用,用于预测预后或治疗反应。免疫疗法,或免疫肿瘤学,是一门利用人体免疫系统来预防、控制和消除癌症的癌症治疗研究。在这篇综述中,我们首先简要介绍了放射组学和免疫肿瘤学在肺癌中的应用。然后,我们讨论了开发免疫肿瘤学生物标志物的必要性,以及放射组学在识别与免疫治疗相关的生物标志物方面的优势。我们还讨论了肿瘤内外的潜在区域,如肿瘤内缺氧区和肿瘤微环境,放射组学标志物可能被提取,以及放射组学生物标志物在临床肺癌管理中的潜在应用。最后,我们介绍了非小细胞肺癌的放射和免疫调节,临床试验及其设计,以纳入放射组学生物标志物,以及放射组学指导的精确放射治疗。
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引用次数: 1
Evaluating bone marrow dosimetry with the addition of bone marrow structures to the medical internal radiation dose phantom 在医用内部辐射剂量体模中添加骨髓结构评估骨髓剂量测定
Q4 Medicine Pub Date : 2023-03-01 DOI: 10.1002/pro6.1189
K. Ferrone, C. Willis, F. Guan, Jingfei Ma, Leif E. Peterson, S. Kry
Reliable estimates of radiation dose to bone marrow are critical to understanding the risk of radiation‐induced cancers. Although the medical internal radiation dose phantom is routinely used for dose estimation, bone marrow is not defined in the phantom. Consequently, methods of indirectly estimating bone marrow dose have been implemented based on dose to surrogate volumes or average dose to soft tissue.
对骨髓辐射剂量的可靠估计对于了解辐射诱发癌症的风险至关重要。虽然医学内辐射剂量幻象通常用于剂量估计,但骨髓在幻象中没有定义。因此,间接估计骨髓剂量的方法已经实施基于剂量到替代体积或平均剂量到软组织。
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引用次数: 1
Definitive chemoradiotherapy in elderly patients with esophageal cancer: Safety and outcome 老年癌症食管癌最终放化疗的安全性和疗效
Q4 Medicine Pub Date : 2023-03-01 DOI: 10.1002/pro6.1190
I. Kiladze, Lika Chkhaidze, A. Iovashvili, E. Natelauri, B. Sokurashvili, E. Mariamidze, N. Kacheishvili, B. Jeremic
Objective: The efficacy and safety of definitive chemoradiotherapy (dCRT) for elderly patients with unresectable esophageal cancer (EC) are not yet fully understood. We conducted this study to evaluate the outcome and toxicity in elder patients (65 years and over) of unresectable EC treated with dCRT.
目的:明确放化疗(dCRT)治疗老年不可切除食管癌(EC)的疗效和安全性尚不完全清楚。我们进行了这项研究,以评估老年患者(65岁及以上)接受dCRT治疗的不可切除EC的预后和毒性。
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引用次数: 0
Dosimetric response of Gafchromic EBT-XD film to therapeutic protons. Gafchromic的剂量反应™ EBT‐XD薄膜治疗质子
Q4 Medicine Pub Date : 2023-03-01 Epub Date: 2023-03-02 DOI: 10.1002/pro6.1187
Fada Guan, Xiaochun Wang, Ming Yang, Emily Draeger, Dae Han, Kiminori Iga, Fanqing Guo, Luis Perles, Yuting Li, Narayan Sahoo, Radhe Mohan, Zhe Chen

EBT-XD model of Gafchromic films has a broader optimal dynamic dose range, up to 40 Gy, compared to its predecessor models. This characteristic has made EBT-XD films suitable for high-dose applications such as stereotactic body radiotherapy and stereotactic radiosurgery, as well as ultra-high dose rate FLASH radiotherapy. The purpose of the current study was to characterize the dependence of EBT-XD film response on linear energy transfer (LET) and dose rate of therapeutic protons from a synchrotron. A clinical spot-scanning proton beam was used to study LET dependence at three dose-averaged LET (LETd) values of 1.0 keV/µm, 3.6 keV/µm, and 7.6 keV/µm. A research proton beamline was used to study dose rate dependence at 150 Gy/second in the FLASH mode and 0.3 Gy/second in the non-FLASH mode. Film response data from LETd values of 0.9 keV/µm and 9.0 keV/µm of the proton FLASH beam were also compared. Film response data from a clinical 6 MV photon beam were used as a reference. Both gray value method and optical density (OD) method were used in film calibration. Calibration results using a specific OD calculation method and a generic OD calculation method were compared. The four-parameter NIH Rodbard function and three-parameter rational function were compared in fitting the calibration curves. Experimental results showed that the response of EBT-XD film is proton LET dependent but independent of dose rate. Goodness-of-fit analysis showed that using the NIH Rodbard function is superior for both protons and photons. Using the "specific OD + NIH Rodbard function" method for EBT-XD film calibration is recommended.

Gafchromic的EBT‐XD模型™ 与之前的模型相比,薄膜具有更宽的最佳动态剂量范围,最高可达40Gy。这一特性使EBT‐XD胶片适用于高剂量应用,如立体定向身体放射治疗和立体定向放射外科,以及超高剂量率FLASH放射治疗。本研究的目的是表征EBT‐XD膜响应对同步加速器治疗质子的线性能量转移(LET)和剂量率的依赖性。临床点扫描质子束用于研究三个剂量平均LET值为1.0 keV/μm、3.6 keV/微米和7.6 keV/微克时的LET依赖性。研究质子束线用于研究FLASH模式中150 Gy/s和非FLASH模式下0.3 Gy/s的剂量率依赖性。还比较了质子FLASH束0.9 keV/μm和9.0 keV/微米的剂量平均LET值的薄膜响应数据。临床6MV光子束的胶片响应数据用作参考。胶片校准采用灰度值法和光密度法。比较了使用特定OD计算方法和通用OD计算方法的校准结果。在拟合校准曲线时,比较了四参数NIH Rodbard函数和三参数有理函数。实验结果表明,EBT‐XD薄膜的响应是质子LET依赖性的,但与剂量率无关。拟合优度分析表明,使用NIH Rodbard函数对质子和光子都很好。建议使用“特定OD+NIH Rodbard函数”方法进行EBT‐XD胶片校准。
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引用次数: 0
Adding the X‐ray Bragg reflection physical process in crystal to the Geant4 Monte Carlo simulation toolkit, part I: reflection from a crystal slab 将晶体中的X射线布拉格反射物理过程添加到Geant4蒙特卡罗模拟工具包中,第一部分:晶体板的反射
Q4 Medicine Pub Date : 2023-02-26 DOI: 10.1002/pro6.1188
F. Guan, Makoto Asai, D. Bartkoski, Michael Kleckner, Ze’ev Harel, M. Salehpour
X‐ray diffraction from a solid crystal shows the wave nature of photons. It is an important electromagnetic (EM) physics process when X‐ray photons interact with a crystal. Bragg diffraction, often called Bragg reflection, is a special case of the general form of X‐ray diffraction, known as Laue diffraction. When the Bragg's law is met, the incident photon beam is reflected from the crystal plane behaving as a specular reflection at the Bragg angle. However, the Bragg reflection physical process has not been integrated into the general‐purpose Monte Carlo simulation toolkit Geant4 for particle physics. In the current study, we developed a new EM physical process class “G4CrystalBraggReflection” and a new EM physical model class “G4DarwinDynamicalModel” for modeling the Bragg reflection physical process within a crystal. We added the Bragg reflection physical process to the EM physics category of Geant4. The preliminary results of photon tracking in a silicon crystal slab have shown the feasibility of simulating the Bragg reflection process in addition to the standard EM processes in the framework of Geant4.
固体晶体的X射线衍射显示了光子的波动性质。X射线光子与晶体相互作用是一个重要的电磁物理过程。布拉格衍射,通常被称为布拉格反射,是X射线衍射的一种特殊形式,被称为劳厄衍射。当布拉格定律满足时,入射的光子束以布拉格角的镜面反射形式从晶体平面反射出去。然而,布拉格反射物理过程还没有集成到通用的蒙特卡罗模拟工具Geant4中。在本研究中,我们开发了一个新的EM物理过程类“G4CrystalBraggReflection”和一个新的EM物理模型类“G4DarwinDynamicalModel”,用于模拟晶体内的Bragg反射物理过程。我们将Bragg反射物理过程添加到Geant4的EM物理类别中。在硅晶体板中光子跟踪的初步结果表明,在Geant4的框架中,除了模拟标准EM过程外,还可以模拟Bragg反射过程。
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引用次数: 1
Radiotherapy of early‐stage breast cancer 癌症早期乳腺癌的放射治疗
Q4 Medicine Pub Date : 2023-01-29 DOI: 10.1002/pro6.1183
Cedric X. Yu
Breast cancer is the most prevalent disease for women. With advances in breast cancer screening, most breast cancers are now diagnosed in the early stages. With knowledge of different subtypes and their behavior, breast cancer treatment has become more individualized. Radiation therapy as one of the mainstays of breast cancer treatment has also been evolving. This review attempts to provide a summary of the most influential clinical studies that have driven the technological advances in radiation therapy for early‐stage breast cancer.
癌症是女性最常见的疾病。随着癌症筛查的进展,大多数乳腺癌现在都处于早期诊断阶段。随着对不同亚型及其行为的了解,癌症的治疗变得更加个体化。放射治疗作为癌症治疗的支柱之一也在不断发展。这篇综述试图总结推动早期乳腺癌症放射治疗技术进步的最具影响力的临床研究。
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引用次数: 2
Clinical outcomes after salvage external beam radiotherapy combined with interstitial brachytherapy for locally advanced, recurrent endometrial cancer 挽救性外束放疗联合间质近距离放疗治疗局部晚期复发性癌症的临床疗效
Q4 Medicine Pub Date : 2023-01-24 DOI: 10.1002/pro6.1185
Asma Waheed, R. Banerjee, T. Meyer, S. Quirk, C. Doll, P. McGeachy, T. Phan, M. Roumeliotis, K. Martell
Salvage external beam radiation therapy (EBRT) followed by interstitial brachytherapy is commonly used to treat patients with vaginal recurrence of endometrial cancer. The evidence for this is typically limited to case series treating small volumes of disease. For the present study, 12 consecutive patients with locally advanced, biopsy‐proven vaginal recurrence after surgically treated endometrial cancer who received salvage EBRT (45 Gy in 25 daily fractions to microscopic disease and 55–57.5 Gy to gross nodal disease) with magnetic resonance‐guided interstitial brachytherapy (20–21 Gy in 3 fractions over 2 days) were retrospectively reviewed. The median tumor size of recurrent disease on magnetic resonance imaging was 5 (3–6) cm. Three (25%) tumors involved the bladder wall, three (25%) involved the urethra, and four (33%) extended to the pelvic sidewall. Four (25%) patients had gross nodal disease. On follow‐up, no (0%) patient developed local recurrence. One patient (8%) developed nodal recurrence outside of the radiotherapy treatment volume and then distant metastases, and one patient (8%) developed distant metastasis 2.5 years post‐treatment and subsequently died from the disease. No (0%) other deaths were reported. Zero patients (0%) developed grade ≥4 bowel or bladder toxicity. These data support EBRT with interstitial brachytherapy using modern techniques for locally advanced, vaginal recurrences of endometrial cancer.
挽救性外束放射治疗(EBRT)和间质近距离放射治疗通常用于治疗子宫内膜癌症阴道复发患者。这方面的证据通常仅限于治疗少量疾病的病例系列。在本研究中,回顾性回顾了12例手术治疗子宫内膜癌症后局部晚期、经活检证实阴道复发的连续患者,这些患者接受了磁共振引导的间质近距离治疗(2天内3次,20-21 Gy)的挽救性EBRT(显微镜下疾病为45 Gy,粗结疾病为55-57.5 Gy)。磁共振成像显示复发性疾病的中位肿瘤大小为5(3-6)cm。三个(25%)肿瘤涉及膀胱壁,三个(25%)涉及尿道,四个(33%)延伸至盆腔侧壁。4名(25%)患者患有大体淋巴结疾病。在随访中,没有(0%)患者出现局部复发。一名患者(8%)在放疗治疗量之外出现淋巴结复发,然后发生远处转移,一名患者在治疗后2.5年出现远处转移,随后死于该疾病。没有(0%)其他死亡报告。零名患者(0%)出现≥4级肠或膀胱毒性。这些数据支持使用现代技术对子宫内膜癌症局部晚期阴道复发进行间质近距离放射治疗的EBRT。
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引用次数: 1
Impact of dose calculation accuracy on inverse linear energy transfer optimization for intensity‐modulated proton therapy 剂量计算精度对调强质子治疗逆线性能量传递优化的影响
Q4 Medicine Pub Date : 2022-12-08 DOI: 10.1002/pro6.1179
Mei Chen, W. Cao, P. Yepes, F. Guan, F. Poenisch, Cheng Xu, Jiayi Chen, Yupeng Li, Ivan Vazquez, Ming Yang, X. Zhu, Xiaodong Zhang
To determine the effect of dose calculation accuracy on inverse linear energy transfer (LET) optimization for intensity‐modulated proton therapy, and to determine whether adding more beams would improve the plan robustness to different dose calculation engines.
确定剂量计算精度对强度调制质子治疗的逆线性能量转移(LET)优化的影响,并确定增加更多的光束是否会提高计划对不同剂量计算引擎的鲁棒性。
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引用次数: 2
Stereotactic body radiotherapy compared with video‐assisted thoracic surgery after propensity‐score matching in elderly patients with pathologically‐proven early‐stage non‐small cell lung cancer 经病理证实的早期非小细胞肺癌癌症老年患者倾向评分匹配后立体定向放疗与视频辅助开胸手术的比较
Q4 Medicine Pub Date : 2022-12-01 DOI: 10.1002/pro6.1175
Xiao‐ye Liu, Miao Gao, Ze‐yuan Cheng, Zheng‐Kun Cai, Lu Yu, Geng‐Min Niu, Jun-yi Li, Yu-Lin Bai, Shu‐Zhou Zhao, Yong-chun Song, Xiao-Guang Wang, Yang Dong, Xuyao Yu, Z. Tao, Z. Yuan
Standard medical treatment for early non‐small cell lung cancer (NSCLC) is surgery; however, stereotactic body radiotherapy (SBRT) can be a viable substitute for elderly patients who can no longer tolerate or refuse surgery. The unsurpassed care for elderly patients with early NSCLC remains inconclusive.
早期非小细胞肺癌癌症(NSCLC)的标准医疗方法是手术;然而,立体定向身体放射治疗(SBRT)可以成为不再耐受或拒绝手术的老年患者的可行替代品。对老年早期非小细胞肺癌患者的卓越护理仍然没有定论。
{"title":"Stereotactic body radiotherapy compared with video‐assisted thoracic surgery after propensity‐score matching in elderly patients with pathologically‐proven early‐stage non‐small cell lung cancer","authors":"Xiao‐ye Liu, Miao Gao, Ze‐yuan Cheng, Zheng‐Kun Cai, Lu Yu, Geng‐Min Niu, Jun-yi Li, Yu-Lin Bai, Shu‐Zhou Zhao, Yong-chun Song, Xiao-Guang Wang, Yang Dong, Xuyao Yu, Z. Tao, Z. Yuan","doi":"10.1002/pro6.1175","DOIUrl":"https://doi.org/10.1002/pro6.1175","url":null,"abstract":"Standard medical treatment for early non‐small cell lung cancer (NSCLC) is surgery; however, stereotactic body radiotherapy (SBRT) can be a viable substitute for elderly patients who can no longer tolerate or refuse surgery. The unsurpassed care for elderly patients with early NSCLC remains inconclusive.","PeriodicalId":32406,"journal":{"name":"Precision Radiation Oncology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45989375","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
期刊
Precision Radiation Oncology
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