Proefschrift_vd_Beek

Van der Beek: Differences in levels along CI array

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Table 2: Number of implanted patients excluded from the study.

Patients excluded from study: Number: Mentally handicapped Non-Dutch speaker

5 1 3 1 2 3 4 17

Deceased, natural cause Facial-nerve stimulation Incomplete insertion Device failure

No follow-up level data available Could not reconstruct CT data

Total

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Figure 1

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Figure 1: Multiplanar reconstruction of a post-implantation CT scan showing the intra-cochlear location of the individual contacts. The arrows indicate the distance to the modiolus and the insertion depth of the most basal electrode contact.

F.B. van der Beek

of this method of measuring the rotational angle and the distance to the modiolus was validated previously [Verbist et al., 2010a]. Because the scanning protocol was in development during the first inclusion period, 17 subjects had CT scans that were not of sufficient quality to allow multi-planar reconstructions. Those patients were not included in this study (Table 2).

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