Healthy Clinical Trial
Official title:
Characterization of Brain Morphology and Activity Using Functional and Anatomical MRI Contrast
NCT number | NCT00004577 |
Other study ID # | 000082 |
Secondary ID | 00-N-0082 |
Status | Recruiting |
Phase | |
First received | |
Last updated | |
Start date | July 1, 2000 |
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.
Status | Recruiting |
Enrollment | 1100 |
Est. completion date | |
Est. primary completion date | |
Accepts healthy volunteers | Accepts Healthy Volunteers |
Gender | All |
Age group | 18 Years to 120 Years |
Eligibility | - INCLUSION CRITERIA: - 18 years of age and older - in good general health - able to understand the procedures and requirements and give informed consent EXCLUSION CRITERIA: All Subjects will undergo a neurological physical and answer the Healthy volunteer form, and the most-recent version of the NMR safety screening A subject will be excluded if he/she: 1. 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; 2. has claustrophobia; 3. cannot lie comfortably for up to 120 minutes; 4. underwent brain surgery or suffered a head trauma 5. has migraines that require medication; 6. has a psychiatric disorder (defined by the DSM-5); 7. has a neurological lesion or history of neurological disorders; 8. has known hearing problems; 9. is pregnant; 10. has permanent eye liner; 11. has medical problems such as, diabetes mellitus, hypertension, pulmonary or airway disease, heart failure, coronary artery disease, or history of sleep apnea. 12. has a diagnosable substance dependence 13. 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 a ferromagnetic dental crown or a bridge. |
Country | Name | City | State |
---|---|---|---|
United States | National Institutes of Health Clinical Center | Bethesda | Maryland |
Lead Sponsor | Collaborator |
---|---|
National Institute of Neurological Disorders and Stroke (NINDS) |
United States,
Detre JA, Leigh JS, Williams DS, Koretsky AP. Perfusion imaging. Magn Reson Med. 1992 Jan;23(1):37-45. doi: 10.1002/mrm.1910230106. — View Citation
Ogawa S, Lee TM, Kay AR, Tank DW. Brain magnetic resonance imaging with contrast dependent on blood oxygenation. Proc Natl Acad Sci U S A. 1990 Dec;87(24):9868-72. doi: 10.1073/pnas.87.24.9868. — View Citation
Ogawa S, Tank DW, Menon R, Ellermann JM, Kim SG, Merkle H, Ugurbil K. Intrinsic signal changes accompanying sensory stimulation: functional brain mapping with magnetic resonance imaging. Proc Natl Acad Sci U S A. 1992 Jul 1;89(13):5951-5. doi: 10.1073/pnas.89.13.5951. — View Citation
Type | Measure | Description | Time frame | Safety issue |
---|---|---|---|---|
Primary | 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. | 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. | annually | |
Secondary | 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. | Secondary outcome measure will be an estimate of the relative performance levels of the different field strengths for anatomical, functional and spectroscopic imaging. | annually |
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