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Validation of diffusion tensor MRI-based muscle fiber tracking

โœ Scribed by Bruce M. Damon; Zhaohua Ding; Adam W. Anderson; Andrea S. Freyer; John C. Gore

Publisher
John Wiley and Sons
Year
2002
Tongue
English
Weight
562 KB
Volume
48
Category
Article
ISSN
0740-3194

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โœฆ Synopsis

Diffusion-tensor (DT) MRI fiber tracking may potentially be used for in vivo structural analysis. The purpose of this study was to assess quantitatively the ability of a DT-MRI fiber-tracking algorithm to measure the fiber orientation (pennation) in skeletal muscle in vivo. In five adult Sprague-Dawley rats, the pennation angle (theta) was measured in the rat lateral gastrocnemius with DT-MRI (theta(DT-MRI)) and by direct anatomical inspection (DAI) (theta(DAI)). The mean theta(DT-MRI) was not significantly different from the mean theta(DAI). In addition, the two methods were highly correlated (r = 0.89) and the regression of theta(DT-MRI) on theta(DAI) resulted in a slope not significantly different from 1 and an intercept not significantly different from zero. These data indicate that DT-MRI-based fiber tracking as implemented here is a valid tool for in vivo structural analysis of small-animal skeletal muscle.

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