Figure 3 | Scientific Reports

Figure 3

From: Simpler and effective radiological evaluations for modiolar proximity of a slim modiolar cochlear implant electrode

Figure 3

Landmark -based measurement of a spiral diameter on the postinsertion radiography. (a) The spiral diameter of the spiral configuration of the electrode array was measured on a horizontal line (red line) across the modiolus (M). This line is positioned vertically based on a reference line (blue line) connecting the apex of the superior semicircular canal (S) to the vestibule (V) and the round window (RW). (b) A representative X-ray-based spiral diameter on an unmarked radiograph of a right cochlea.

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