FIGURE 1.

(A) 3-D Reconstruction from CT of a CI recipient’s electrode array with dark line and gray hash markers used to measure all 22 electrode positions. The cochlear diameter as shown is measured from the center of the round window through the mid-modiolar axis to the lateral wall. (B) Measurements used to obtain array insertion depth and the mediolateral position of the array (wrapping factors, WF) are shown. These include the lateral wall length (L_LW) from the angular position of E_B to the angular position of E_A (blue line), the length along the electrode trajectory (L_EL) from E_B to E_A (green line), and the distance along the electrode array from the cochleostomy to E_B (L_BE). The electrode insertion length to E_A is then the sum of lengths L_BE and L_EL. Figure reprinted from Holden et al. (2013) with permission from Wolters Kluwer Health, Inc. The Creative Commons license does not apply to this content. Use of the material in any format is prohibited without written permission from the publisher, Wolters Kluwer Health, Inc. Please contact permissions@lww.com for further information.