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(A) Plain CT scan shows the needle tip was located at the right side of C5-6, as indicated by the arrow; (B) Plain CT scan shows the needle tip was located at the right side of C6-7, as indicated by the arrow; (C) Plain CT scan shows the needle tip was located at the right side of C7-T1, as indicated by the arrow; (D) The three-dimensional reconstruction shows the needle and the direction, located at the right side of the cervical nerve root, as indicated by the arrow.
