适应性MRI导向再辐射用于高风险的复发4级结质瘤:早期临床结果和体积反应
Luiza Giuliani Schmitt1, Michael Dohopolski1, Jill de Vis1
1UT Southwestern Medical Center, Department of Radiation Oncology, USA.
International journal of radiation oncology, biology, physics
|February 9, 2026
概括
个性化超分离立体自适应放射治疗 (PULSAR) 是可行的复发性高度质瘤. 这种以MRI为指导的方法可以进行适应性重新规划,但其对传统再辐射的临床益处需要进一步研究.
科学领域:
- 神经瘤学神经瘤学
- 辐射瘤学 辐射瘤学
- 医学物理 医学物理
背景情况:
- 重复的世卫组织4级质瘤呈现出不良预后,治疗选择有限.
- 再辐射 (re-RT) 提供了局部控制,但面临着累积辐射剂量和毒性的限制.
- 个性化超分离立体感适应性放射治疗 (PULSAR) 使用MRI-线性加速器 (MR-Linacs) 进行脉冲式再RT,具有适应性重新规划能力.
研究的目的:
- 评估MRI引导的PULSAR重复RT在患有WHO4级质瘤的患者中的可行性和结果.
- 评估整体存活率 (OS),无进展存活率 (PFS),局部衰竭率 (LF) 和毒性率.
- 探索临床因素与治疗结果之间的关联.
主要方法:
- 对45名患有复发性世卫组织4级质瘤的患者进行了回顾性分析,这些患者在1.5TMR-Linac上接受了MRI引导的PULSAR重复RT治疗.
- 治疗通常涉及五次计划脉冲 (25-35 Gy分为5个分数),用剂量绘制和基于临时MRI的适应性重新规划.
- 终点包括OS,PFS,LF和等级≥3毒性 (大脑,血液事件).
主要成果:
- 80%的患者接受了适应性重新规划; 66.7%完成了计划中的治疗过程.
- 平均OS和PFS分别为6.9个月和5.1个月.
- 12个月累计LF发病率为56.0%,等级≥3大脑胀为40.0%,等级≥3血液毒性为38.0%.
结论:
- 在高风险的复发性质瘤队列中,MRI引导的PULSAR重复RT与适应性重新规划是可行的.
- 临时MRI促进了实时治疗决策,但在没有对照组的情况下,适应性策略对传统的re-RT的好处是不确定的.
- 预期研究是必要的,以优化工作流程,完善策略,并确认临床益处.
相关概念视频
Cells of the Adaptive Immune Response
9.0K
The T and B lymphocytes of the adaptive immune system develop from common lymphoid progenitor cells in the bone marrow. These progenitors give rise to precursors that eventually develop into both T and B lymphocytes. As these precursors mature, they gain the ability to detect and respond to foreign antigens in the body, a process known as immunocompetence. Additionally, these precursors acquire self-tolerance, a process that ensures they do not react to self-antigens. This intricate system...
9.0K
Graded Potential
7.1K
Graded potentials are localized fluctuations in the cell membrane's electrical charge, commonly found in the dendrites of neurons. The magnitude of these potential changes depends on the strength of the initiating stimulus. In a membrane at its resting potential, a graded potential signifies a voltage shift either above -70 mV or below -70 mV.
Graded potentials fall into two categories: depolarizing and hyperpolarizing. Depolarizing graded potentials typically occur when sodium (Na+) or...
Graded potentials fall into two categories: depolarizing and hyperpolarizing. Depolarizing graded potentials typically occur when sodium (Na+) or...
7.1K
Predicting Reaction Outcomes
11.0K
Kinetics describes the rate and path by which a reaction occurs. In contrast, thermodynamics deals with state functions and describes the properties, behavior, and components of a system. It is not concerned with the path taken by the process and cannot address the rate at which a reaction occurs. Although it does provide information about what can happen during a reaction process, it does not describe the detailed steps of what appears on an atomic or a molecular level. On the other hand,...
11.0K
Relative Risk
2.2K
Relative risk (RR) is a statistical measure commonly used in epidemiology to compare the likelihood of a particular event occurring between two groups. This metric is important for evaluating the relationship between exposure to a specific risk factor and the probability of a particular outcome. It plays a crucial role in medical research, public health studies, and risk assessment. Relative risk quantifies how much more (or less) likely an event is to occur in an exposed group compared to an...
2.2K
Outcomes of Glycolysis
107.6K
Nearly all the energy used by cells comes from the bonds that make up complex organic compounds. These organic compounds are broken down into simpler molecules, such as glucose. As a result, cells extract energy from glucose over many chemical reactions—a process called cellular respiration.
Cellular respiration can occur aerobically (with oxygen) or anaerobically (without oxygen). In the presence of oxygen, cellular respiration starts with glycolysis and continues with pyruvate...
Cellular respiration can occur aerobically (with oxygen) or anaerobically (without oxygen). In the presence of oxygen, cellular respiration starts with glycolysis and continues with pyruvate...
107.6K
Types of Aggregate Grading
1.5K
Aggregate grading is crucial in economically obtaining a concrete mix with adequate strength, reasonable workability, and minimal segregation. There are four types of aggregate gradation: well-graded, uniformly (or one-sized) graded, gap-graded, and open-graded.
Well-graded aggregates include a complete range of necessary size fractions that fit together to create a dense matrix with minimal voids, represented by a smooth, continuous gradation curve. This type of grading ensures good...
Well-graded aggregates include a complete range of necessary size fractions that fit together to create a dense matrix with minimal voids, represented by a smooth, continuous gradation curve. This type of grading ensures good...
1.5K


