The role of cochlear implant positioning on MR imaging quality: a preclinical in vivo study with a novel implant magnet system
| العنوان: | The role of cochlear implant positioning on MR imaging quality: a preclinical in vivo study with a novel implant magnet system |
|---|---|
| المؤلفون: | Lorenzo Preda, Elena Carlotto, Irene Avato, Pietro Canzi, Marco Benazzo, Elvis Lafe, Anna Simoncelli, Federico Aprile, Marianna Magnetto, Marco Manfrin, Andrea Scribante |
| المصدر: | European Archives of Oto-Rhino-Laryngology. 279:2889-2898 |
| بيانات النشر: | Springer Science and Business Media LLC, 2021. |
| سنة النشر: | 2021 |
| مصطلحات موضوعية: | medicine.medical_specialty, business.industry, Image quality, medicine.medical_treatment, General Medicine, Cochlear Implantation, Magnetic Resonance Imaging, Mr imaging, Temporal lobe, Cochlear Implants, Otorhinolaryngology, Cochlear implant, Magnets, Humans, Medicine, Neurosurgery, Radiology, Implant, Artifacts, business, Occipital lobe |
| الوصف: | Purposes To investigate the effects for Ultra 3D cochlear implant (CI) positioning on MR imaging quality, looking at a comprehensive description of intracranial structures in cases of unilateral and bilateral CI placement. Methods Four CI angular positions (90°, 120°, 135° and 160°) at 9 cm distance from the outer-ear canal were explored. The 1.5 T MRI assessment included our institutional protocol for the investigation of brain pathologies without gadolinium application. Three investigators (two experienced neuroradiologists and one experienced otoneurosurgeon) independently evaluated the MR findings. A 4-point scale was adopted to describe 14 intracranial structures and to determine which CI positioning allowed the best image quality score and how bilateral CI placement modified MRI scan visibility. Results A high positive correlation was found between the three blinded observers. Structures situated contralateral from the CI showed high-quality values in all four placements. Structures situated ipsilaterally provided results suitable for diagnostic purposes for at least one position. At 90°, artifacts mainly involved brain structures located cranially and anteriorly (e.g., temporal lobe); on the contrary, at 160°, artifacts mostly influenced the posterior fossa structures (e.g., occipital lobe). For the bilateral CI condition, MR imaging examination revealed additional artifacts involving all structures located close to either CI, where there was a signal void/distortion area. Conclusions Suitable unilateral CI positioning can allow the visualization of intracranial structures with sufficient visibility for diagnostic purposes. Bilateral CI positioning significantly deteriorates the anatomical visibility. CI positioning might play a crucial role for patients who need post-operative MRI surveillance. |
| تدمد: | 1434-4726 0937-4477 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0c4fb4ba46444fd49593b215d9d77f8a https://doi.org/10.1007/s00405-021-07005-y |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....0c4fb4ba46444fd49593b215d9d77f8a |
| قاعدة البيانات: | OpenAIRE |
Find this article in full text from Springer Verlag. | تدمد: | 14344726 09374477 |
|---|