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(A1)(A2), PI; (B1)(B2), ACS 4.37; (C1)(C2), ACS 6.22; (D1)(D2), ACS 9.03. Orange arrows in (A1)(B1)(C1)(D1) indicate right C6 nerve and left C6 nerve. Blue arrows in (A1)(B2)(C2)(D2) indicate right medial cord and feft medial cord. It can be observed that ACS 9.03 shows poor neural details and blurs compared to other images, which leads to insufficient diagnostic confidence
