Xenon-129 Magnetic Resonance Imaging of Healthy Subjects: Hardware and Software Development and Reproducibility
试验速览
- 阶段
- 不适用
- 状态
- 招募中
- 发起方
- 入组人数
- 50
- 试验地点
- 2
- 主要终点
- Ventilation Defect Percent (VDP)
研究概览
简要总结
Healthy volunteers aged 18-85 will undergo hyperpolarized 129-Xe MRI and pulmonary function testing for the development of tools to assess image signal to noise and reproducibility of spin-density and diffusion-weighted imaging.
详细描述
Briefly, during a one to two hour visit, subjects will provide written informed consent and then undergo: 1) brief medical history and vital signs, 2) full pulmonary function tests, 3) proton MRI, 4) spin-density, diffusion weighted, and/or dissolved phase 129-Xe MRI.
Full pulmonary function tests including spirometry, plethysmography and diffusing capacity of carbon monoxide (DLCO), Multiple Breath Nitrogen Washout (MBNW) to measure Lung Clearance Index (LCI), and Forced Oscillation Technique (FOT) will be performed according to ATS guidelines. MedGraphics Elite Series, MedGraphics Corporation. St. Paul, MN USA and/or nDD EasyOne Spirometer, nDD Medical Technologies Inc. Andover, MA USA will be used. All measurements will be performed in the Pulmonary Function Laboratory at Robarts Research Institute.
Subjects will be placed in the 3T MR scanner with one of three 129-Xe chest coils fitted over their torso and chest. Hearing protection will be provided to each subject to muffle the noise produced by the gradient RF coils. A pulse oximeter lead will be attached to all of the subjects to monitor their heart rate and oxygen saturation. MRI will be performed for up to a period of 30 minutes. All subjects will have supplemental oxygen available via nasal cannula at a flow-rate of 2 liters per minute as a precaution in the event of oxygen desaturation.
研究设计
- 研究类型
- Interventional
- 分配方式
- Na
- 干预模型
- Single Group
- 主要目的
- Basic Science
- 盲法
- None
入排标准
- 年龄范围
- 18 Years 至 85 Years（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •able to perform a breath hold for up to 16 sec
- •BMI between 18 and 40
- •stable health on the basis of medical history
- •smoking history < 1 pack/year
排除标准
- •Patient is, in the opinion of the investigator, mentally or legally incapacitated, preventing informed consent from being obtained, or cannot read or understand the written material.
- •Subject has a daytime room air oxygen saturation <90% while lying supine.
- •Patient is unable to perform spirometry or plethysmography maneuvers
- •Patient is pregnant
- •In the investigator's opinion, subject suffers from any physical, psychological or other condition(s) that might prevent performance of the MRI, such as severe claustrophobia.
- •Subject has an implanted mechanically, electrically or magnetically activated device or any metal in their body which cannot be removed, including but not limited to pacemakers, neurostimulators, biostimulators, implanted insulin pumps, aneurysm clips, bioprosthesis, artificial limb, metallic fragment or foreign body, shunt, surgical staples (including clips or metallic sutures and/or ear implants.)
结局指标
主要结局
Ventilation Defect Percent (VDP)
时间窗: 5 years
次要结局
- Apparent Diffusion Coefficients (ADC)(5 years)
- Dissolved Phase Spectroscopy Measurements(5 years)
研究者
Dr. Grace Parraga
PhD, Scientist. Robarts Research Institute
Western University, Canada