Cochlear nerve diameter in normal hearing ears using high‐resolution magnetic resonance imaging

Jaryszak, Eric M.; Patel, Nimish; Camp, Morgan; Mancuso, Anthony A.; Antonelli, Patrick J.

doi:10.1002/lary.20516

Cited by 29 publications

(37 citation statements)

References 7 publications

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“…There was no correlation between the diameter of the FN or CN with age. Table 5 shows the results of comparisons between the mean diameters of the CN in the present study and in the previous study using 3D-CISS, 11 and Table 6 shows those between the mean diameters of the CN and FN in the present study and in the previous study using 3D-DRIVE at 3T. 12 …”

Section: Resultssupporting

confidence: 49%

“…We also compared mean diameters in the present study and previous studies, evaluating the normative diameters of the CN using 3D-CISS 11 and the CN and FN using 3D-DRIVE at 3T. 12 We found no statistical diŠerence between the diameters of the present study and the previous study using 3D-CISS, 11 although measurement locations were not necessarily identical (Table 5). On the other hand, diameters diŠered significantly between the present study and the previous study using 3D-DRIVE, 12 except for the CSA of the FN (Table 6).…”

Section: Discussionsupporting

confidence: 43%

“…13 To date, the normative diameters of the CN and FN on 3D-DRIVE based on fast spin-echo sequence at 3T and the CN diameter in normal-hearing ears on 3D-CISS have been reported. 11,12 However, to the best of our knowledge, the present study is theˆrst to describe the normal diameters of both the CN and FN on 3D-CISS at 3T.…”

Section: Discussionmentioning

confidence: 92%

“…Several studies have reported the normative diameters of CN or FN on magnetic resonance (MR) imaging. 8,9,11,12 However, to the best of our knowledge, no study has reported normal diameters of both the CN and FN on 3D-CISS at 3 tesla. Therefore, we evaluated the normal diameter values of the CN and FN using 3D-CISS on a 3T MR imaging scanner.…”

Section: Introductionmentioning

confidence: 90%

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Establishing Normal Diameter Range of the Cochlear and Facial Nerves with 3D-CISS at 3T

Nakamichi¹,

Yamazaki²,

Ikeda³

et al. 2013

MRMS

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Purpose: We explored normal diameter values of the cochlear (CN) and facial (FN) nerves on 3-dimensional constructive interference in steady state (3D-CISS) using a 3-tesla magnetic resonance (MR) imaging scanner.Methods: A total of 142 patients underwent MR imaging of the inner ear at 3T. We retrospectively analyzed data from 172 ears. All ears had normal hearing and no history of ipsilateral facial palsy. Parasagittal images of 0.5-mm thickness perpendicular to the internal auditory canal were reconstructed from 0.4-mm thick axial 3D-CISS images for all ears. Two independent radiologists measured the long diameter (LD), short diameter (SD), and cross-sectional area (CSA) of each CN and FN. For each measurement, we calculated the mean value from the 2 observers and evaluated interobserver agreement. We also evaluated the correlation between nerve diameter and sex and age.Results: Both observers could perform measurements in 157 CN from 172 ears (91z) and 165 FN from 172 ears (96z). For the CN, the mean LD was 1.35±0.16 mm, the mean SD was 0.99±0.18 mm, and the mean CSA was 1.07±0.30 mm 2 ; for the FN, the mean values were 1.18±0.17 mm (LD), 0.87±0.16 mm (SD), and 0.83±0.27 mm 2 (CSA). Interobserver reliability was good for each measurement (r＝0.569 to 0.691, Pº0.01). The diameters of the 2 nerves tended to be larger in men, but only the CSA of the FN was signiˆcantly larger in men (Pº0.05). Age did not aŠect nerve diameter.Conclusion: We present normal values of CN and FN diameters on 3D-CISS at 3T. Our results warrant further study to clarify the pathophysiological state of the CN or FN using 3D-CISS.

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Section: Resultssupporting

confidence: 49%

Section: Discussionsupporting

confidence: 43%

Section: Discussionmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 90%

See 2 more Smart Citations

Establishing Normal Diameter Range of the Cochlear and Facial Nerves with 3D-CISS at 3T

Nakamichi¹,

Yamazaki²,

Ikeda³

et al. 2013

MRMS

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show abstract

“…The CN is usually considered normal whenever its diameter is larger or equal to that of the FN [8], and several studies using SSFP MRI sequences have reported normal diameter values for the CN [3,8]. In the study of Nakamichi et al [3], the long and short diameters of the CN were approximately 1.35 ± 0.16 mm and 0.99 ± 0.18 mm when measured on the parasagittal image.…”

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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Normative diameters and effects of aging on the cochlear and facial nerves in normal‐hearing Korean ears using 3.0‐tesla magnetic resonance imaging

Kang¹,

Hyun²,

Lim³

et al. 2012

The Laryngoscope

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Cochlear nerve diameter in normal hearing ears using high‐resolution magnetic resonance imaging

Abstract: CN diameter can be reliably measured at the IAC fundus. This study establishes normative radiographic data for the CN diameter. These data may be used to evaluate the cause and treatment prognosis in patients with sensorineural hearing loss.

Cited by 29 publications

References 7 publications

Establishing Normal Diameter Range of the Cochlear and Facial Nerves with 3D-CISS at 3T

Establishing Normal Diameter Range of the Cochlear and Facial Nerves with 3D-CISS at 3T

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

Normative diameters and effects of aging on the cochlear and facial nerves in normal‐hearing Korean ears using 3.0‐tesla magnetic resonance imaging

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