MRI assesment of internal acoustic canal variations using 3D-FIESTA sequences

Erdoğan, Nuri; Altay, Canan; Akay, Emrah; Karakas, Levent; Uluc, Engın; Mete, Berna Dirim; Oygen, A; Oyar, Orhan; Gelal, Fazıl; Songu, Murat; Katılmış, Hüseyin; Çallı, Çağlar

doi:10.1007/s00405-012-1994-7

Cited by 18 publications

(20 citation statements)

References 14 publications

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“…The 3D-FIESTA sequence that we used in our study provides much higher spatial resolution than routine MRI sequences and accurate visualization of the cisternal portion of the cranial nerves without the need for intravenous administration of gadolinium-chelate (20,21). This sequence can provide better imaging of the nerves along their courses in the IAC with clearer anatomical details.…”

Section: Discussionmentioning

confidence: 96%

Evaluation of the facial nerve and internal auditory canal cross-sectional areas on three-dimensional fast imaging employing steady-state acquisition magnetic resonance imaging in Bell’s palsy

Sanhal¹,

Arslan²

2018

Turk J Med Sci

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Background/aim: This study aimed to evaluate the facial nerve (FN) and internal auditory canal (IAC) on three-dimensional fast imaging employing steady-state acquisition (3D-FIESTA) magnetic resonance imaging (MRI) to define possible structural differences in cases of Bell's palsy (BP). Materials and methods:Fifty-six patients presenting with BP were included in this study. The measurements of the diameters and the cross-sectional areas (CSAs) of the FNs and IACs obtained on 3D-FIESTA MRI both on the affected and unaffected sides of all patients were compared.Results: A significant difference was found between affected and unaffected sides of the patients in terms of the mean CSA of the FN and IAC (P < 0.001). The CSAs of the FN were larger and the CSAs of the IAC were smaller on the affected sides than the equivalents on the unaffected sides of the patients, respectively. The difference in terms of the ratios of IAC CSA to FN CSA between affected and unaffected sides of the patients was also found to be statistically significant (P < 0.001). Conclusion:We have found that FN and IAC size differ on the affected sides of patients with BP. These anatomical differences may contribute to the risk for this disease.

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Section: Discussionmentioning

confidence: 96%

Evaluation of the facial nerve and internal auditory canal cross-sectional areas on three-dimensional fast imaging employing steady-state acquisition magnetic resonance imaging in Bell’s palsy

Sanhal¹,

Arslan²

2018

Turk J Med Sci

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“…Imaging of the temporal bone with 3D-FIESTA sequences in patients presenting with hearing loss, tinnitus, vertigo, and peripheral facial palsy has previously demonstrated positive findings in 18.37% of patients [5]. The CN, SVN, IVN, and FN all have a characteristic cross-sectional appearance on sagittal oblique FIESTA images [1], and 3D-FIESTA [6] and other SSFP sequences with high spatial resolution have been demonstrated as being significantly better for the identification of the four intracanalicular nerves than 3D turbo spin echo (TSE) sequences [7]. Due to its superior spatial resolution, the direct sagittal oblique imaging technique theoretically allows clearer delineation of the individual nerves of the IAC than can be achieved with MPR techniques [2].…”

Section: Discussionmentioning

confidence: 99%

Evaluation of vestibulocochlear nerves in cases with acoustic schwannoma by direct sagittal oblique 3D-FIESTA MR imaging

Taiji¹,

Okamoto²,

Kanzaki³

2017

Otorhinolaryngol Head Neck Sur

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Oblique sagittal MRI with 3D-FIESTA (3-D fast imaging employing steady-state acquisition) sequences can be obtained through the internal auditory canal (IAC) without relying on multi-planar reconstructions. The high spatial resolution direct sagittal oblique imaging technique is useful for the identification of the four intracanalicular nerves. This work included one case of IAC tumor and two cases of cerebellopontine angle (CPA) tumors. MR imaging using a 3D-FIESTA sequence was performed in the oblique sagittal plane perpendicular to the course of the IAC. The direct sagittal oblique imaging technique allowed clear delineation of the individual nerves of the IAC. In a case of acoustic schwannoma, which was surgically proven to originate from the inferior vestibular nerve (IVN), the results of vestibular assessment indicated an IVN pathology. Acquired cochlear nerve hypoplasia with moderate hearing loss was found in a case of CPA tumor.

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“…3D-fast imaging employing steady state acquisition (3D-FIESTA) was recently introduced, and was demonstrated to give significantly higher spatial resolution with outstanding image contrast between the cranial nerves and CSF and has much shorter image acquisition time than conventional MRI scan ( Erdogan et al., 2013 , Rigby, 2006 ). Ishikawa et al.…”

Section: Non-contrast Mrimentioning

confidence: 99%

“Wait and scan” management of patients with vestibular schwannoma and the relevance of non-contrast MRI in the follow-up

Zou

Hirvonen

2017

Journal of Otology

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Vestibular schwannoma (VS) is a slow-growing benign neoplasm. There has been an evolution in the management of VS from active treatments (microsurgery and stereotactic radiotherapy) to conservative management (wait and scan). Regular MRI scanning is necessary to monitor tumor progression. Conservative management causes significantly less complications and offers a higher quality of life compared with active treatments. The mean growth rate of VS varies from 0.4 to 2.9 mm/year, and spontaneous shrinkage is observed in 3.8 percent of tumors during observation. If significant growth occurs, active treatment is considered. Significant growth is defined as an increase of at least 3 mm in the largest extrameatal diameter in any plane between the first and last available scans. The vestibulocochlear nerve is surrounded by cerebrospinal fluid, which provides natural contrast for MRI; thus, gadolinium may not be needed to detect VS. Specific sequences have high sensitivity, specificity, and accuracy for detection of progression. Hypointense signal in the ipsilateral inner ear fluid might be a useful sign to distinguish VS from meningioma. In this paper, we summarize the current status of research on conservative management and non-contrast MRI for the detection of VS.

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MRI assesment of internal acoustic canal variations using 3D-FIESTA sequences

Cited by 18 publications

References 14 publications

Evaluation of the facial nerve and internal auditory canal cross-sectional areas on three-dimensional fast imaging employing steady-state acquisition magnetic resonance imaging in Bell’s palsy

Evaluation of the facial nerve and internal auditory canal cross-sectional areas on three-dimensional fast imaging employing steady-state acquisition magnetic resonance imaging in Bell’s palsy

Evaluation of vestibulocochlear nerves in cases with acoustic schwannoma by direct sagittal oblique 3D-FIESTA MR imaging

“Wait and scan” management of patients with vestibular schwannoma and the relevance of non-contrast MRI in the follow-up

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