Kohlear implant adaylarında temporal kemik BT ve MRG
Küçük Resim Yok
Tarih
2003
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
AMAÇ VIII. kranyal siniri sağlam sensörinöral işitme kayıplı olgularda, kohlear implant uygulaması ile işitme yeniden sağlanabilmektedir. Kohlear implant adayı olguların preoperatif radyolojik incelemesinde; işitme kaybının etyolojisinin belirlenmesi, operasyonu güçleştirebilecek varyasyonların ve konjenital malformasyonların ortaya konması, kohleanın açıklığının ve VIII. kranial sinirin varlığının kanıtlanması önemlidir. Bu çalışmanın amacı, literatür bilgilerini de gözden geçirerek, kohlear implant adayı olguların preoperatif radyolojik değerlendirmesinde operasyonun şeklini ve başarısını etkileyebilecek bulguları tartışmaktır. GEREÇ VE YÖNTEM Yüksek rezolüsyonlu bilgisayarlı tomografi uygulanan 33 kohlear implant adayı olgu çalışmaya dahil edilmiştir. 23 olguda 1.5 Tesla cihazda yüksek rezolüsyonlu hızlı spin eko sekansında T2 ağırlıklı görüntüleme ve constructive interference in steady state (CISS) sekansında görüntüleme uygulanmıştır. BULGULAR 16 olguda bilgisayarlı tomografi ve/veya manyetik rezonans görüntülemede temporal kemik normal bulundu. 4 olguda labirentte tek taraflı ya da bilateral osifikasyon gözlendi. 13 olguda temporal kemiğin varyasyonları, konjenital malformasyonlar, kronik otit ve travma sekeli değişiklikler saptandı. 5 olguya kohlear implant uygulandı. Bu olgularda operasyonda karşılaşılan güçlükler, komplikasyonlar ve operasyon sonuçları kaydedildi. SONUÇ Kohlear implant adayı olgularda, yüksek rezolüsyonlu bilgisayarlı tomografi ve manyetik rezonans görüntülemede yüksek rezolüsyonlu T2 ağırlıklı sekanslar ve "constructive interference in steady state" sekansı kullanılarak elde olunan temporal kemik görüntüleri, operasyonun planlanmasında ve ortaya çıkabilecek komplikasyonların önceden bilinmesinde cerraha yardımcıdır.
PURPOSE: Hearing can be restored by cochlear implantation in patients with sensorineural hearing loss, who have a normal seventh cranial nerve. the aim of imaging in cochlear implant candidates is to determine the etiology of the hearing loss, congenital malformations and variations that may cause difficulty during the operation, patency of the cochlea and the presence of the seventh, cranial nerve. the aim of this study is to review the literature and to discuss the imaging findings that may affect the type and success of the operation. MATERIALS AND METHODS: 33 cochlear implant candidates, who underwent high resolution computed tomography, were included in the study. High resolution fast spin echo T2 weighted and constructive interference in steady state sequences were performed in 23 patients with a 1.5 Tesla magnetic resonance unit. RESULTS: Computed tomography and magnetic resonance imaging were normal in 16 patients. Unilateral or bilateral labyrinthine ossification was detected in 4 patients. Variations of the temporal bone, congenital malformations, sequelae of chronic otitis and trauma were detected in 13 patients. Cochlear implantation was performed in 5 patients. Operative difficulty, complications and postoperative outcome were noted in these 5 patients. CONCLUSION: High resolution computed tomography and magnetic resonance images obtained by high resolution T2 weighted fast spin echo sequence and constructive interference in steady state sequence help the surgeon in planning the operation and predict potential complications in cochlear implant candidates.
PURPOSE: Hearing can be restored by cochlear implantation in patients with sensorineural hearing loss, who have a normal seventh cranial nerve. the aim of imaging in cochlear implant candidates is to determine the etiology of the hearing loss, congenital malformations and variations that may cause difficulty during the operation, patency of the cochlea and the presence of the seventh, cranial nerve. the aim of this study is to review the literature and to discuss the imaging findings that may affect the type and success of the operation. MATERIALS AND METHODS: 33 cochlear implant candidates, who underwent high resolution computed tomography, were included in the study. High resolution fast spin echo T2 weighted and constructive interference in steady state sequences were performed in 23 patients with a 1.5 Tesla magnetic resonance unit. RESULTS: Computed tomography and magnetic resonance imaging were normal in 16 patients. Unilateral or bilateral labyrinthine ossification was detected in 4 patients. Variations of the temporal bone, congenital malformations, sequelae of chronic otitis and trauma were detected in 13 patients. Cochlear implantation was performed in 5 patients. Operative difficulty, complications and postoperative outcome were noted in these 5 patients. CONCLUSION: High resolution computed tomography and magnetic resonance images obtained by high resolution T2 weighted fast spin echo sequence and constructive interference in steady state sequence help the surgeon in planning the operation and predict potential complications in cochlear implant candidates.
Açıklama
Anahtar Kelimeler
Radyoloji, Nükleer Tıp, Tıbbi Görüntüleme
Kaynak
Tanısal ve Girişimsel Radyoloji (Yeni Adı: Dİagnostic & Intervent. Radiol)
WoS Q Değeri
Scopus Q Değeri
Cilt
9
Sayı
1
