3-D CT and MRI co-registration in the assessment of cochlear implantation.

Abstract:

BACKGROUND:The aim of this study was to evaluate the feasibility of co-registering preoperative MRI and postoperative CT and to assess the position of the electrode within the cochlea. MATERIAL/METHODS:In a series of 14 patients, high-resolution MRI datasets of the cochlea obtained before implantation and multirow CT datasets obtained after implantation were co-registered using a stereoscopic display and volume-rendering platform (Dextroscope, Volume Interactions/Bracco, Singapore). Image co-registration was performed with a semi-automatic method (multipoint plus freehand fusion). RESULTS:In 2 patients the electrode was correctly inserted in the middle turn of the cochlea and the assigned rank was 4 (corresponding to the initial tract of the middle turn). In 8 patients the rank was 3, meaning that the electrode tip reached the upper portion of the basal turn. In 4 patients the rank was 2, meaning that the electrode tip reached the middle portion of the basal turn; in two of these patients, electrode kinking was observed. CONCLUSIONS:Co-registration of preoperative MRI and postoperative CT is feasible and represents a unique method to assess electrode position within the membranous labyrinth.

journal_name

Med Sci Monit

authors

Neri E,Berrettini S,Salvatori L,Forli F,Franceschini SS,Bartolozzi C

subject

Has Abstract

pub_date

2005-10-01 00:00:00

pages

MT63-7

issue

10

eissn

1234-1010

issn

1643-3750

pii

6667

journal_volume

11

pub_type

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