We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Magnetic Resonance Imaging Artifacts and Cochlear Implant Positioning at 1.5 T In Vivo.
- Authors
Schröder, Dirk; Grupe, Gloria; Rademacher, Grit; Mutze, Sven; Ernst, Arneborg; Seidl, Rainer; Mittmann, Philipp
- Abstract
Objective. Cerebral magnetic resonance imaging with the magnet of the cochlear implant receiver/stimulator in place causes artifacts and hinders evaluation of intracerebral structures. The aim of this study was to evaluate the internal auditory canal and the labyrinth in a 1.5T MRI with the magnet in place. Study Design. Observational study. Setting. Tertiary referral center. Subjects and Methods. The receiver/stimulator unit was placed and fixed onto the head of three volunteers at three different angles to the nasion–outer ear canal (90°–160°) and at three different distances from the outer ear canal (5–9 cm). T1 and T2 weighted sequences were conducted for each position. Results. Excellent visibility of the internal auditory canal and the labyrinth was seen in the T2 weighted sequences with 9 cm between the magnet and the outer ear canal at every nasion–outer ear canal angle. T1 sequences showed poorer visibility of the internal auditory canal and the labyrinth. Conclusion. Aftercare and visibility of intracerebral structures after cochlear implantation is becoming more important as cochlear implant indications are widened worldwide. With a distance of at least 9 cm from the outer ear canal the artifact induced by the magnet allows evaluation of the labyrinth and the internal auditory canal.
- Subjects
VESTIBULAR apparatus; EAR canal; COCHLEAR implants; DIAGNOSIS; EAR examination; PATIENT aftercare; MAGNETIC resonance imaging; MEDICAL equipment calibration; SCIENTIFIC observation; POSTOPERATIVE period; MEDICAL artifacts; TERTIARY care; IN vivo studies; ANATOMY
- Publication
BioMed Research International, 2018, p1
- ISSN
2314-6133
- Publication type
Article
- DOI
10.1155/2018/9163285