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Abstract #2788

Value of fractional anisotropy and apparent diffusion coefficient of diffusion tensor imaging in diagnosing early carpal tunnel syndrome

Tsutomu Inaoka1, Ryosuke Sakai1, Hisanori Tomobe1, Masahiro Sogawa1, Akinori Yamamoto1, Takamitsu Uchi1, Sayuri Kato1, Rumiko Ishikawa1, Tomoya Nakatsuka1, Noriko Kitamura1, Shusuke Kasuya1, and Hitoshi Terada1
1Radiology, Toho University Sakura Medical Center, Sakura, Japan

There are decreased FA and increased ADC significantly with age in healthy subjects. There are significant differences in FA and ADC between early-stage CTS subjects and age-matched healthy subjects. 0.56 was found to be cutoff value for FA with 89% sensitivity and 88% accuracy and 0.75x10-3mm2/s was found to be cutoff value for ADC with 79% sensitivity and 78% accuracy. Although FA and ADC well correlate with clinical examinations and NCS results, the value of FA is much stronger than that of ADC for diagnosing CTS earlier. DTI can be used for the early diagnosis of CTS.

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