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Fig. 1 | BMC Musculoskeletal Disorders

Fig. 1

From: Combination of high-frequency ultrasound and virtual touch tissue imaging and quantification improve the diagnostic efficiency for mild carpal tunnel syndrome

Fig. 1

Ultrasound diagnosis (a) The longitudinal section of HFUS showed thickening of the middle normal nerve in carpal canal, decreased echo, and increased blood flow signal in power Doppler ultrasound; b Median nerve CSA was measured using the pisiform bone as a reference; c ROI was measured three times at the carpal tunnel inlet and outlet parallel to the pisiform bone and groove bone and different areas in the median nerve at the midpoint of the carpal canal

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