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Magnetization Transfer Quantitation and Characterization for Clinical Scanners

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ClinicalTrials.gov Identifier: NCT00001714
Recruitment Status : Completed
First Posted : December 10, 2002
Last Update Posted : March 4, 2008
Sponsor:
Information provided by:
National Institutes of Health Clinical Center (CC)

Brief Summary:
This project will measure magnetization transfer (MT) parameters on normal subjects using two novel approaches. The first is the investigation of asymmetric MT effects with respect to the zero or on-resonance reference point. The technique measures the difference in MT effect between two symmetrically positioned off-resonance MT pulses in the positive and negative frequency ranges. Prior research with this technique in the kidney show a difference in the macromolecular lineshape that correlates to a specific metabolite. The second approach, utilizing a subset of the acquisitions from the first approach, will test newly developed formulation to calculate the macromolecular fraction, or fraction of proton density that accounts for MT. We foresee these measurements may significantly develop our understanding of MT and introduce diagnostic and quantitative tools to study human tissues.

Condition or disease
Healthy

Detailed Description:
This project will measure magnetization transfer (MT) parameters on normal subjects using two novel approaches. The first is the investigation of asymmetric MT effects with respect to the zero or on-resonance reference point. The technique measures the difference in MT effect between two symmetrically positioned off-resonance MT pulses in the positive and negative frequency ranges. Prior research with this technique in the kidney show a difference in the macromolecular lineshape that correlates to a specific metabolite. The second approach, utilizing a subset of the acquisitions from the first approach, will test newly developed formulation to calculate the macromolecular fraction, or fraction of proton density that accounts for MT. We foresee these measurements may significantly develop our understanding of MT and introduce diagnostic and quantitative tools to study human tissue.

Study Type : Observational
Enrollment : 100 participants
Official Title: Magnetization Transfer Quantitation and Characterization for Clinical Scanners
Study Start Date : March 1998
Study Completion Date : July 2001




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Ages Eligible for Study:   Child, Adult, Older Adult
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes
Criteria

Normal control between the ages of 18 - 70 years of age who are capable of giving informed consent.

Subjects must not have a condition which would preclude their use for technical development (e.g. paralyzed hemidiaphragm, morbid obesity, claustrophobia, etc.).

Subjects must not have a condition which would present unnecessary risks (e.g. pregnancy, surgery of uncertain type, symptoms of pheochromocystoma or insulinoma, etc.).

Lactating women and subjects with hemoglobinopathies, asthma, or renal or hepatic disease will be excluded from studies involving the administration of contrast agents.

Must not have a contraindication to MR scanning such as surgery that involves metal clips or wires which might be expected to concentrate radiofrequency fields or cause tissue damage from twisting in a magnetic field. Examples include: aneurysm clip; implanted neural stimulator; implanted cardiac pacemaker or autodefibrillator; cochlear implant; ocular foreign body (e.g. metal shavings); insulin pump.


Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT00001714


Locations
United States, Maryland
Warren G. Magnuson Clinical Center (CC)
Bethesda, Maryland, United States, 20892
Sponsors and Collaborators
National Institutes of Health Clinical Center (CC)