Characterization of Brain Morphology and Activity Using Functional and Anatomical MRI Contrast
试验速览
- 阶段
- 不适用
- 状态
- 招募中
- 入组人数
- 1,100
- 试验地点
- 1
- 主要终点
- The purpose of this study is to develop and evaluate new MR pulse sequences and hardware for performing anatomical and functional MRI in the CNS at, 3.0T, and 7T with a high spatial resolution.
研究概览
简要总结
The purpose of this investigation is to develop improved magnetic resonance imaging (MRI) techniques and hardware for studying brain function. MRI is a diagnostic tool that provides information about brain chemistry and physiology. This study will evaluate new MRI methods for monitoring blood flow to regions of the brain in response to simple tasks. The MRI machine used in this study is more powerful than those in most hospitals, permitting a higher visual resolution.
Normal healthy volunteers over 18 years old may be eligible for this study. Candidates will be screened with a medical history and questionnaire, and a neurological examination. Study participants will have a yearly MRI scan. For this procedure, the subject lies on a stretcher that is moved into a donut-shaped machine with a strong magnetic field. A lightweight circular or rectangular coil-a device that improves the quality of the images-may be placed on the head. The scan time varies from 20 minutes to 3 hours; most scans last between 45 and 90 minutes. During the scan, the subject may perform simple tasks, such as listening to tapes, tapping a finger, moving a hand, watching a screen, or smelling a fragrance. More complex tasks may require thinking about tones or pictures and responding to them by pressing buttons.
Information from this study will be used to develop better imaging methods that will, in turn, permit a greater understanding of normal and abnormal brain behaviors.
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详细描述
Objective
The goal of this protocol is to improve spatial resolution and contrast in MRI studies of brain anatomy and function, by developing novel hardware, and image acquisition and reconstruction techniques. Specifically, by improving MRI image quality and manipulating MRI contrast, we aim to better characterize and quantify structural, chemical, and blood flow variations across the brain, and study their relationship with neuronal activity. For this purpose, we will develop and optimize novel MRI techniques on normal, healthy volunteers, and combine these with EEG and recording of other physiological signals.
Study Population
Any healthy, male or female volunteer 18 years of age and older; the subjects must be capable of understanding the procedures and requirements of this study and be willing to sign an informed consent document.
Design
研究设计
- 研究类型
- Observational
- 观察模型
- Cohort
- 时间视角
- Prospective
入排标准
- 年龄范围
- 18 Years 至 120 Years（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •INCLUSION CRITERIA:
- •18 years of age and older
- •in good general health
- •able to understand the procedures and requirements and give informed consent
排除标准
- •All Subjects will undergo a neurological physical and answer the Healthy volunteer form, and the most-recent version of the NMR safety screening form
- •A subject will be excluded if he/she:
- •has any metal implant or objects of unknown identity or composition, or if it s known to be non-compatible with MRI, such as pacemakers, medication pumps, aneurysm clips, metallic prosthesis (such as heart valves or cochlear implants), certain orthopedic implants (pins and rods), shrapnel, or small metal fragments in the eye;
- •has claustrophobia;
- •cannot lie comfortably for up to 120 minutes;
- •underwent brain surgery or suffered a traumatic head trauma;
- •has migraines that require medication;
- •has ever been hospitalized for a psychiatric disorder;
- •has medical health problems such as pulmonary or airway disease, heart failure, coronary artery disease, and uncontrolled hypertension which would require physiological monitoring during the scan;
- •has a history of any medical condition that could result in an emergency medical situation while undergoing the MRI scan;
- •has hearing problems which would make it difficult to tolerate scanner noise;
- •is pregnant;
- •has body/make-up tattoos (e.g. lips, eyebrows, eyeliner). Each tattoo will be considered on a case-to-case basis, taking into account of the age and location of the tattoo;
- •has a sleep apnea diagnosis;
- •has a neurological disorder, such as Stroke, Parkinson s, and Epilepsy;
- •a member of the NINDS Laboratory of Functional and Molecular Imaging.
- •The contraindications to MRI at the various field strengths are almost identical, except the 7 T also excludes subjects with gold dental crowns.
研究组 & 干预措施
Healthy Volunteer
Any healthy, male or female volunteer 18 years of age and older.
结局指标
主要结局
The purpose of this study is to develop and evaluate new MR pulse sequences and hardware for performing anatomical and functional MRI in the CNS at, 3.0T, and 7T with a high spatial resolution.
时间窗: annually
The primary outcome of this study will be the ability to robustly acquire whole brain MRI sensitized to myelin, iron, diffusion, perfusion, and fiber orientation. Perfusion- and BOLD- based fMRI techniques will allow distinguishing between neuronal and systemic vascular signal contributions. In addition, we anticipate the ability to acquire (proton) spectroscopic data at 5mm resolution.
次要结局
- To develop an understanding of the limits in contrast and resolution of anatomical and functional MRI.To develop an understanding of the merits of high field MRI for the study of brain anatomy and function.(annually)