Reduced Planning Target Volume (PTV) Margins for the Treatment of Prostate Cancer Using the Calypso 4D Localization System (PTV)
2016年5月13日 更新者：Dusten Macdonald, MD、U.S. Army Medical Research Acquisition Activity
Reduced PTV Margins for the Treatment of Prostate Cancer With IMRT Using Real-Time, State-of-the-Art Motion Tracking With the Calypso 4D Localization System: A Feasibility Study
This prospective study evaluates the clinical utility of a novel real-time localization system allowing for smaller volumes of normal tissue to be included in radiation field and determines dosimetric parameters and adverse effect profiles of radiation therapy using this technology.
Subjects will have beacon transponders implanted into the prostate to more precisely localize the position of the organ during radiation therapy.
Hypothesis: 1. Treatment with highly targeted radiation therapy can be delivered in a daily treatment time consistent with routine clinical practice.
2. Highly targeted radiation therapy with reduced PTV margin will result in a significant decrease in rectal and bladder volume treated.
研究概览
地位
未知
条件
详细说明
This study will seek to establish the clinical feasibility of a novel real-time localization and tracking system for use of reduced PTV margins during intensity modulated radiation therapy (IMRT), which will allow treatment of smaller volumes of normal tissue during radiation therapy. Such a reduction in the PTV margins and the exposure of healthy tissue during treatment may allow for several future improvements in prostate radiotherapy including:
- decreased acute and chronic adverse effects with similar local tumor control
- dose escalation to achieve higher cure rates with similar adverse effects to standard dose treatment
- hypofractionation to shorten the time of, and lower the expense of, treatment without increased adverse effects.
研究类型
观察性的
注册 (预期的)
40
联系人和位置
本节提供了进行研究的人员的详细联系信息，以及有关进行该研究的地点的信息。
学习地点
-
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Washington
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Tacoma、Washington、美国、98431
- Madigan Healthcare System
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-
参与标准
研究人员寻找符合特定描述的人，称为资格标准。这些标准的一些例子是一个人的一般健康状况或先前的治疗。
资格标准
适合学习的年龄
40年 及以上 (成人、年长者)
接受健康志愿者
不
有资格学习的性别
男性
取样方法
非概率样本
研究人群
Patients with localized prostate cancer for whom definitive radiation therapy is planned to the prostate only or prostate and seminal vesicle only, without ajuvant or neoadjuvant hormornal therpy will be referred by the radiation oncololgists and urologists.
描述
Inclusion Criteria:
- Histologically confirmed adenocarcinoma of the prostate
- Low Risk: T1a, T1b, T1c, T2a; Gleason Score less than 7, PSA less than or equal to 10
- Intermediate Risk: T2b, T2c; Gleason Score less than or equal to 7, PSA less than or equal to 15
- Ability to comply with study schedule
- Age 40 or older
- Zubrod PS 0 or 1
- Signed informed consent
Exclusion Criteria:
- Node positive or metastatic prostate cancer
- Prior treatment of prostate cancer with surgery, chemotherapy, cryotherapy or brachytherapy
- History of prior pelvic radiotherapy
- History of abdominoperineal resection
- History of HIV infection
- History of chronic prostatitis or chronic cystitis
- History of bleeding disorder or any active anticoagulation (excluding ASA)
- PT or INR outside normal range for institution
- Active implanted devices such as cardiac pacemakers and automatic defibrillators.
- Prosthetic implants in the pelvic region that contain metal or conductive materials (eg., an artificial hip).
- Patients with maximum anterior-posterior separation through the torso minus the height of the center of the prostate greater than 17 cm (technical reason for Calypso System, see appendix 8).
- Prior history of androgen deprivation therapy has been deleted and these patients are allowed on study.
学习计划
本节提供研究计划的详细信息，包括研究的设计方式和研究的衡量标准。
研究是如何设计的？
设计细节
- 观测模型：队列
- 时间观点：预期
研究衡量的是什么？
主要结果指标
结果测量 |
措施说明 |
大体时间 |
|---|---|---|
|
Radiation therapy with reduced treatment margins can be adopted as feasible for routine clinical use
大体时间：Approximately 8.5 weeks (43 fractions per pt.)
|
During each radiation treatment fraction, therapists will record set up time, treatment time, total time and number of treatment interventions (repositioning/pausing) as well as the duration of the intervention caused by organ/target motion beyond planning target volume (PTV) margin using real time localization and tracking.
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Approximately 8.5 weeks (43 fractions per pt.)
|
次要结果测量
结果测量 |
措施说明 |
大体时间 |
|---|---|---|
|
Analyze dosimetric characteristics of treatment planning
大体时间：usually within the first 2 weeks after beacon placement (done at simulation CT)
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Standard methods vs. reduced planning target volume expansions will be analyzed:
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usually within the first 2 weeks after beacon placement (done at simulation CT)
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Assess incidence of acute bladder and rectal toxicity
大体时间：approximately 25 months (assessed prior to beacons are placed and then throughout treatment and follow-up)
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toxicity is based on the RTOG/NCI CTC and EPIC quality of life survey.
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approximately 25 months (assessed prior to beacons are placed and then throughout treatment and follow-up)
|
合作者和调查者
在这里您可以找到参与这项研究的人员和组织。
研究记录日期
这些日期跟踪向 ClinicalTrials.gov 提交研究记录和摘要结果的进度。研究记录和报告的结果由国家医学图书馆 (NLM) 审查，以确保它们在发布到公共网站之前符合特定的质量控制标准。
研究主要日期
学习开始
2009年3月1日
初级完成 (预期的)
2017年5月1日
研究完成 (预期的)
2017年8月1日
研究注册日期
首次提交
2012年4月26日
首先提交符合 QC 标准的
2012年5月1日
首次发布 (估计)
2012年5月2日
研究记录更新
最后更新发布 (估计)
2016年5月17日
上次提交的符合 QC 标准的更新
2016年5月13日
最后验证
2016年5月1日
更多信息
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