TY - JOUR
AR - RDI-2018-1-103
TI - Feasibility of sagittal T2 mapping of the median nerve in patients with carpal tunnel syndrome
AU - Hideki , Yoshikawa
AU - Hiroyuki , Tanaka
AU - Hisashi , Tanaka
AU - Takashi , Nishii
AU - Toshiyuki , Shiomi
AU - Tsuyoshi , Murase
AU - Yukari , Takeyasu
JO - Radiology and Medical Diagnostic Imaging
PY - 2018
DA - Thu 12, Apr 2018
SN - 2613-7836
DO - http://dx.doi.org/10.31487/j.RDI.2018.10.003
UR - https://www.sciencerepository.org/feasibility-of-sagittal-T2-mapping-of-the-median-nerve-in-patients-with-carpal-tunnel-syndrome_RDI-1-103 
KW - carpal tunnel syndrome, median nerve, magnetic resonance imaging, diagnosis, clinical study
AB - Purpose: To evaluate patients with carpal tunnel syndrome (CTS) by using 3-Tesla magnetic resonance
imaging (MRI) sagittal T2 mapping of the median nerve for localization of abnormal regions.
Material and Methods: Nine hands of seven patients with CTS and five hands of five healthy volunteers
were evaluated using sagittal T2 mapping and axial spoiled gradient-echo (SPGR) images. Three regions of
interest (ROIs) at the carpal tunnel (ROI-1 to ROI-3) and one control ROI distal to the carpal tunnel (ROIC) were defined on the median nerve and T2-ratios at ROI-1 to ROI-3 relative to ROI-C were calculated.
The flattening ratio (F-ratio; width/height of the median nerve) was also calculated from the axial SPGR
images.
Results: On sagittal T2 mapping, the medial nerve of normal volunteers showed constant T2 values at all
ROIs. In the patients with CTS, there was large variation in T2 among the ROIs and the region of highest
T2 value varied among the patients. T2-ratios at ROI-2 and -3 and the F-ratios along all carpal tunnel levels
were significantly higher in the patients with CTS than in the normal volunteers. A significant correlation
was found between terminal latency and T2-ratio at ROI-2 but not between terminal latency and F-ratio.
Conclusion: Sagittal T2 mapping was feasible for the localization of abnormal T2 regions of the median
nerve in patients with CTS.