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Research ArticleBRAIN

Characterization of Differences between Multiple Sclerosis and Normal Brain: A Global Magnetization Transfer Application

John L. Ostuni, Nancy D. Richert, Bobbi K. Lewis and Joseph A. Frank
American Journal of Neuroradiology March 1999, 20 (3) 501-507;
John L. Ostuni
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Nancy D. Richert
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Bobbi K. Lewis
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Joseph A. Frank
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Abstract

BACKGROUND AND PURPOSE: Although the exact nature of the physiological differences between normal and multiple sclerosis (MS) brains are unknown, it has been shown that their global magnetization transfer ratio (MTR) values are significantly different. To more fully understand these differences, we examined MTR values by using 30 distinct measures. We provide a unique illustration of these differences through a derived normal-to-MS transform.

METHODS: Global MTR values for the group of normal subjects and for the group of MS subjects were characterized by 30 different measures involving simple statistics, histographic characteristics, MTR order information, and MTR range information. The measures that were significantly different with respect to these two groups were discovered. From the mean MTR histogram of the two groups, a transform was created to describe a conversion between the two brain states. Normal data were passed through this transform, creating a set of pseudo-MS data. The measures that were significantly different from the normal and pseudo-MS data were also obtained in order to verify the accuracy of the transform.

RESULTS: Seventeen of the 30 measures were determined to be significantly different when comparing the sets of normal and MS data. The same set of 17 measures were found to be significantly different when comparing the normal and pseudo-MS data.

CONCLUSION: The differences in the global MTR values of normal and MS subjects are statistically significant compared with a large number of measures (α = 0.05). A normal-to-MS transform is a novel method for illustrating these differences.

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American Journal of Neuroradiology
Vol. 20, Issue 3
1 Mar 1999
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Characterization of Differences between Multiple Sclerosis and Normal Brain: A Global Magnetization Transfer Application
John L. Ostuni, Nancy D. Richert, Bobbi K. Lewis, Joseph A. Frank
American Journal of Neuroradiology Mar 1999, 20 (3) 501-507;

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Characterization of Differences between Multiple Sclerosis and Normal Brain: A Global Magnetization Transfer Application
John L. Ostuni, Nancy D. Richert, Bobbi K. Lewis, Joseph A. Frank
American Journal of Neuroradiology Mar 1999, 20 (3) 501-507;
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