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Egyptian Journal of Radiology and Nuclear Medicine
Fig. 1 | Egyptian Journal of Radiology and Nuclear Medicine

Fig. 1

From: The correlation between pre-operative ultrasonographic median nerve evaluation and the operative procedure in CTS

Fig. 1

a Illustration drawing for CSA calculation of the median nerve. b Ultrasonographic cross-sectional area calculation of the median nerve at the level of pisiform bone (area A = 18 mm2) and at the level of pronator quadratus muscle (area B = 11 mm2); CSA difference = (18 − 11) = 7. SC, scaphoid; C, capitate; TR, triquetrum; PS, pisiform

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