A Phase II Study of 18F-Fluorodeoxyglucose (FluGlucoScan) in Patients Receiving a Treatment Planning Study of 3 Dimensional Conformal Radiation Therapy Guided by Breath Held CT and PET Imaging for Patients With Non-Small Cell Lung Cancer
试验速览
- 阶段
- 2 期
- 状态
- 已完成
- 入组人数
- 23
- 试验地点
- 2
- 主要终点
- To define the effect of respiratory-gating upon PET based radiotherapeutic treatment planning parameters relative to the free-breathing condition for patients with NSCLC
研究概览
简要总结
At this time, computed tomography (CT) is the standard tool used at this institution for the staging of non-small cell lung cancer (NSCLC). For most patients, treatment planning for NSCLC is performed with the patient breathing freely during CT scanning. However, recent research has demonstrated that, by holding one's breath briefly, the NSCLC tumor mass can be held motionless. As a result, the tissue to be treated is better pinpointed and the area treated is significantly decreased through breath-hold planning. This allows for a higher dose of radiation to be given to the cancer. PET scanning is a promising newer imaging modality which has shown to be useful in staging NSCLC. This study hypothesizes that breath-held PET scanning and breath held-CT scanning will allow for more stringent radiotherapy plans, minimizing normal tissue toxicity, as well as potentially increasing the dose deliverable to the primary tumor.
详细描述
Concurrent chemotherapy and 3-dimensional conformal radiation therapy (3D-CRT), using computed-tomography (CT) simulation, is the current standard approach in the treatment of inoperable non-small-cell lung cancer (NSCLC). Despite such therapeutic benefit, local recurrence nonetheless remains a significant impediment to cure. Attempts to improve the accuracy of CT-scanning in radiotherapy treatment planning have been increasingly studied. One such approach is the attempted correlation of CT imaging temporally with the physiologic breathing cycle, a process known as gating. By imaging the tumor only when the tumor is immobilized, gating effectively eliminates the effect of motion, thus leading to typically smaller visible tumor masses and the loss of motion-induced distortions. Lung-tumor immobilization using self-gated breath-holding at extremes of inspiration has been validated clinically, and is associated with improved lung-outcome predictors and normal tissue complication probability overall. Several recent studies have demonstrated PET to be both highly sensitive and moderately to highly specific in the staging of NSCLC, and even more sensitive and specific than CT-scanning in the detection of mediastinal and distant metastases from NSCLC. The co-registration of CT and PET images enables even greater accuracy than either modality alone, while the functional imaging inherent in PET may better facilitate the distinction between benign and malignant structures. Overall, the superior tumor staging capability of PET (or PET-CT fusion) together with the improved dosimetry & diminished normal-tissue toxicity associated with deep inspiration breath-hold (DIBH) is expected to confer considerable clinical advantage to the use of gated PET in the radiotherapeutic planning and treatment of NSCLC.
The first objective is to define the effect of respiratory-gating on PET-based radiotherapy planning in comparison to the free-breathing condition for patients with NSCLC. The endpoints here will be to quantify the variation of both PTV and normal-tissue complication probability (NTCP) for certain relevant organs (lung, esophagus, heart) via a direct analysis of calculated volumes.
The second objective is to identify the correlation between PET-based radiotherapy planning volumes and CT-based planning volumes for respiratory-gated patients with NSCLC. The endpoint for this objective will be to quantify the breath-held, PET-based PTVs and NTCPs in comparison to the breath-held, CT-based PTVs and NTCPs.
This study will consider patients with locally advanced non-small-cell cancer of the lung (NSCLC) who are eligible for radical (i.e. with curative intent) combined-modality therapy. Patients will be accrued from the new patient lung clinic at the Cross Cancer Institute. Following a complete clinical assessment comprising a thorough history and physical examination, a thorough analysis of all available imaging, a consideration of all available laboratory results and consideration of any ancillary test results (e.g. pulmonary function testing), a decision will be made whether or not to offer a patient radical therapy. In the case of any uncertainties, further tests, such as repeat CT scanning or diagnostic PET scanning may be arranged to define eligibility.
Eligibility Criteria:
研究设计
- 研究类型
- Interventional
- 分配方式
- Na
- 干预模型
- Single Group
- 主要目的
- Diagnostic
- 盲法
- None
入排标准
- 年龄范围
- 18 Years 至 —（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •Male or female
- •Histologically proven, resected lung cancer of the following histologic types:
- •squamous cell carcinoma;
- •adenocarcinoma;
- •undifferentiated large cell carcinoma;
- •non-small cell; and
- •not otherwise specified.
- •Age equal to or greater than 18 years
- •American Joint Committee (AJC) Stage I-III disease (if all detectable tumours can be encompassed by radiation therapy fields, including both the primary tumour and the involved lymph nodes); patients with positive supraclavicular nodes (N3) are not eligible
- •Able and willing to follow instructions and comply with the protocol
- •Provide written informed consent prior to participation in this study
- •Karnofsky Performance Scale score equal to or greater than 70
- •Measurable disease on the CT and PET images
- •Patient must be deemed eligible for the radical combined-modality therapy.
排除标准
- •Nursing or pregnant females
- •MI disease
- •N3 disease (patients with positive supraclavicular nodes are not eligible)
- •Karnofsky performance status less than 70
- •Patients who have undergone complete tumour resection
- •Patients with post-resection intrathoracic tumour recurrence
- •Evidence of small cell history
- •Age less than 18 years
- •Prior or concurrent malignancy except non-melanomatous skin cancer (unless disease free for at least 5 years)
- •Prior radiotherapy to the thorax or neck
- •Prior chemotherapy
- •Patients with myocardial infarction within the preceding 6 months or symptomatic heart disease, including angina; congestive heart failure; and uncontrolled arrythmias
- •Inability to maintain a state of deep inspiratory breath-hold for a minimum length of time
结局指标
主要结局
To define the effect of respiratory-gating upon PET based radiotherapeutic treatment planning parameters relative to the free-breathing condition for patients with NSCLC
时间窗: One year
次要结局
- To define the relationship between PET based treatment planning volumes and CT based treatment planning volumes within the realm of respiratory-gating for patients with NSCLC(One Year)