Journal of neuroimaging : official journal of the American Society of Neuroimaging · 2011
High-resolution diffusion tensor imaging for the detection of diffusion abnormalities in the trigeminal nerves of patients with trigeminal neuralgia caused by neurovascular compression.
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Fujiwara Shunrou, Sasaki Makoto, Wada Tsukasa, Kudo Kohsuke, Hirooka Ryonoshin, Ishigaki Daiya, Nishikawa Yasumasa, Ono Ayumi, Yamaguchi Mao, Ogasawara Kuniaki
Аннотация
PURPOSE: To detect diffusion abnormalities in the trigeminal nerves of patients with trigeminal neuralgia (TN) caused by neurovascular compression (NVC) by using a high-resolution diffusion tensor imaging (HR-DTI) technique.
METHODS: Thirteen patients with TN and 14 healthy controls underwent HR-DTI scanning. After extracting the trigeminal nerve using a tractography technique, we measured the fractional anisotropy (FA) and apparent diffusion coefficient (ADC), and compared the contralateral ratios (CR) of these parameters between the patients and controls, and correlated these ratios with the cross-sectional areas of the nerves.
RESULTS: The CRs of the FA values for the trigeminal nerves of the patients (1.00±0.15) had significantly higher variance than those of healthy controls (1.00±0.05) (P<.05) and showed a positive correlation with the cross-sectional area of the nerves (r=0.81). In contrast, the CRs of the ADC values were not significantly different between the two groups (1.02±0.10 and 1.01±0.08, respectively) and had no significant correlation with cross-sectional area.
CONCLUSION: HR-DTI can detect an alteration in the relative FA values of affected trigeminal nerves and a correlation with atrophic changes in patients with NVC-induced TN.
METHODS: Thirteen patients with TN and 14 healthy controls underwent HR-DTI scanning. After extracting the trigeminal nerve using a tractography technique, we measured the fractional anisotropy (FA) and apparent diffusion coefficient (ADC), and compared the contralateral ratios (CR) of these parameters between the patients and controls, and correlated these ratios with the cross-sectional areas of the nerves.
RESULTS: The CRs of the FA values for the trigeminal nerves of the patients (1.00±0.15) had significantly higher variance than those of healthy controls (1.00±0.05) (P<.05) and showed a positive correlation with the cross-sectional area of the nerves (r=0.81). In contrast, the CRs of the ADC values were not significantly different between the two groups (1.02±0.10 and 1.01±0.08, respectively) and had no significant correlation with cross-sectional area.
CONCLUSION: HR-DTI can detect an alteration in the relative FA values of affected trigeminal nerves and a correlation with atrophic changes in patients with NVC-induced TN.