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. Author manuscript; available in PMC: 2011 Jul 1.

Published in final edited form as: Otol Neurotol. 2010 Jul;31(5):722–730. doi: 10.1097/MAO.0b013e3181d279e0

Fig 4 — Angular measurements as performed by Boëx et al: a modified Stenvers (Cochlear View) X-ray is performed (a) and a geometric zero reference was determined by the point at which the electrode array crossed the SSC/V reference line described by Cohen et al and Xu et al. This corresponded approximately to the round window (and differed from the geometric zero of Cohen et al and Xu et al). The line going through this point to the center of the first turn of the spiral made by the electrode array, is used as the zero degree reference line for electrodes belonging to the first turn. For electrodes belonging to the second turn of the spiral of the electrode array a line going through the estimated site of the round window to the center of the second turn of the spiral made by the electrode array, is determined as the 720° line (b).

Fig 4 — Angular measurements as performed by Boëx et al: a modified Stenvers (Cochlear View) X-ray is performed (a) and a geometric zero reference was determined by the point at which the electrode array crossed the SSC/V reference line described by Cohen et al and Xu et al. This corresponded approximately to the round window (and differed from the geometric zero of Cohen et al and Xu et al). The line going through this point to the center of the first turn of the spiral made by the electrode array, is used as the zero degree reference line for electrodes belonging to the first turn. For electrodes belonging to the second turn of the spiral of the electrode array a line going through the estimated site of the round window to the center of the second turn of the spiral made by the electrode array, is determined as the 720° line (b).