Imaging and Plan Workflow in a Novel Low-Field Magnetic Resonance Imaging (MRI) Radiotherapy Device
A Pilot Study of Imaging and Plan Workflow in a Novel Low-Field Magnetic Resonance Imaging (MRI) Radiotherapy Device
研究概览
详细说明
Recently, Viewray Inc (Cleveland, OH) has released the RenaissanceTM System 1000, which consists of the combination of an open, split solenoid 0.35 T MRI scanner that is equipped for parallel imaging with a 60Co gamma-ray radiation treatment unit. The MRI scanner is required to be a low field unit to allow for imaging with spatial integrity by limiting magnetic susceptibility artifacts due to the patient and to prevent significant perturbations of the dose distribution. The 0.35 T magnet is a variant of the Siemens MAGNETOM product used for intraoperative imaging.
A previous study of pilot imaging using this device without the 60Co sources was completed in 2012 (HRPO# 201105295). In this study, a total of 26 patients were imaged with the device. Fourteen of these patients also had onboard CT imaging (OB-CT) where the two sets of imaging and relative organs at risk (OARs) could be compared. Fifteen to 24 OARs were evaluated per anatomical site. In total, 221 OARs and 10 target structures were compared for visualization on MRI and OB-CT image sets by each physician. At least 2/3 physicians evaluated MRI as offering better visualization for 71% of structures, OB-CT offering better visualization for 10% of structures, and both offering equivalent visualization for 14% of structures. Physicians agreed unanimously for 74% and in majority for >99% of structures evaluated, respectively. For <1% of structures, no consensus was reached. Targets were better visualized on MRI in 4/10 cases, and were never better visualized on OB-CT images.
There were limitations to this prior study. The patients were not imaged in immobilization devices that are commonly used in radiation therapy. This precluded the creation of a mock radiation therapy plan using the device for these patients. Also, the device was not evaluated in the context of radiation therapy decision making, such as patient shifts, target localization and patient repositioning.
The purpose of this study is to evaluate the imaging and plan workflow for radiation therapy utilizing this novel device. For this protocol, only the MRI scanner of the machine will be utilized. The 60Co portion of the machine capable of radiation treatment administration will not be utilized, and there will be no experimental treatments or modifications to each patient's standard of care radiation treatment plan.
研究类型
注册 (实际的)
阶段
- 阶段1
联系人和位置
学习地点
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Missouri
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St. Louis、Missouri、美国、63110
- Washington University School of Medicine
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参与标准
资格标准
适合学习的年龄
接受健康志愿者
有资格学习的性别
描述
Eligibility Criteria:
- Scheduled to receive radiation therapy.
- At least 18 years of age.
- Does not meet any standard contraindications for MRI (such as being claustrophobic, having metal objects within the body that cannot be removed or having large tattoos), confirmed by completion of our clinical MRI questionnaire form
- Able to understand and willing to sign an IRB approved written informed consent document.
学习计划
研究是如何设计的?
设计细节
- 主要用途:诊断
- 分配:不适用
- 介入模型:单组作业
- 屏蔽:无(打开标签)
武器和干预
参与者组/臂 |
干预/治疗 |
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实验性的:MRI
Participants will have a custom immobilization device created for them for the purpose of the study.
They will be scanned from one to four occasions during radiation treatment.
If enrolled in the study prior to the first radiation treatment, the first imaging scan may be scheduled prior to the first radiation treatment, with subsequent scans during treatment separated by at least one day.
Patients will be in the scanner for approximately 30 minutes to one hour, either prior to or following their standard of care radiotherapy treatment.
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其他名称:
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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 |
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Adequacy of the radiation therapy plan
大体时间:Duration of radiation therapy
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The radiation plan will be evaluated based on the recorded clinical goals prescribed by the attending physician.
Plans will be classified as 'adequate' if they meet the prescribed goals for the clinical radiation therapy plan.
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Duration of radiation therapy
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Feasibility of patient localization workflow
大体时间:Duration of radiation therapy
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The localization time will be classified as 'adequate' if it is less than or equal to 15 minutes.
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Duration of radiation therapy
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合作者和调查者
调查人员
- 首席研究员:Jeff Michalski, M.D.、Washington University School of Medicine
出版物和有用的链接
研究记录日期
研究主要日期
学习开始 (实际的)
初级完成 (实际的)
研究完成 (实际的)
研究注册日期
首次提交
首先提交符合 QC 标准的
首次发布 (估计)
研究记录更新
最后更新发布 (实际的)
上次提交的符合 QC 标准的更新
最后验证
更多信息
与本研究相关的术语
其他相关的 MeSH 术语
其他研究编号
- 201311081
计划个人参与者数据 (IPD)
计划共享个人参与者数据 (IPD)?
药物和器械信息、研究文件
研究美国 FDA 监管的药品
研究美国 FDA 监管的设备产品
在美国制造并从美国出口的产品
此信息直接从 clinicaltrials.gov 网站检索,没有任何更改。如果您有任何更改、删除或更新研究详细信息的请求,请联系 register@clinicaltrials.gov. clinicaltrials.gov 上实施更改,我们的网站上也会自动更新.
磁共振成像的临床试验
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Medical University of Vienna暂停
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University of CalgaryAlberta Heritage Foundation for Medical Research; Calgary Health Region完全的
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French Cardiology SocietyInstitut National de la Santé Et de la Recherche Médicale, France完全的
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Medical Centre LeeuwardenUniversity of Groningen; LIMIS Development招聘中