Redefining Normal Facial Nerve Enhancement: Healthy Subject Comparison of Typical Enhancement Patterns—Unenhanced and Contrast-Enhanced Spin-Echo Versus 3D Inversion Recovery–Prepared Fast Spoiled Gradient-Echo Imaging

Dehkharghani, Seena; Lubarsky, Michael; Aiken, Ashley H.; Kang, Jian; Hudgins, Patricia A.; Saindane, Amit M.

doi:10.2214/ajr.13.11659

Cited by 20 publications

(42 citation statements)

References 13 publications

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“…It was most difficult to depict the facial nerve in the labyrinthine segment on both T1‐VISTA and T1‐FFE. This difficulty could contribute to the previously reported low rate of the Gd‐enhancement in the labyrinthine segment on 3D‐SPGR at 3.0T MRI, despite the relatively high signal intensity on 3D inversion recovery‐prepared fast spoiled gradient‐echo (IR‐FSPGR) compared to that with a fat‐saturated 2D‐SE sequence (at 1.5T MRI) …”

Section: Discussionmentioning

confidence: 99%

“…A 1.5T MRI study with 3D IR‐FSPGR as a 3D‐T1WI sequence showed a significantly greater signal intensity of the normal facial nerve than that acquired with fat‐saturated 2D‐SE in most segments on both pre‐ and post‐Gd‐enhanced images. This result was due to the higher spatial resolution of 3D IR‐FSPGR than that of the fat‐saturated 2D‐SE sequence . The greater intrinsic signal intensity of the facial nerve with 3D IR‐FSPGR could be misinterpreted as pathological Gd‐enhancement without complementary pre‐Gd‐enhanced images …”

Section: Discussionmentioning

confidence: 99%

“…This result was due to the higher spatial resolution of 3D IR‐FSPGR than that of the fat‐saturated 2D‐SE sequence . The greater intrinsic signal intensity of the facial nerve with 3D IR‐FSPGR could be misinterpreted as pathological Gd‐enhancement without complementary pre‐Gd‐enhanced images …”

Section: Discussionmentioning

confidence: 99%

“…In such a clinical setting, hyperintensity of the facial nerve on Gd‐enhanced 3D‐T1WI with a GRE sequence does not necessarily represent Gd‐enhancement of the facial nerve (Fig. ) . Therefore, a precise evaluation of the signal intensity on both pre‐ and post‐Gd‐enhanced images with the same pulse sequence is necessary to detect Gd‐enhancement of the facial nerve on MRI (Fig.…”

Section: Discussionmentioning

confidence: 99%

“…The signal intensity of normal and pathological facial nerves has been evaluated on MRI after gadolinium (Gd)‐enhancement with various pulse sequences . 3D T1‐weighted imaging (3D‐T1WI) is now widely used for imaging and evaluation of the facial nerve at 1.5T MRI and 3.0T MRI …”

Section: Introductionmentioning

confidence: 99%

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Better continuity of the facial nerve demonstrated in the temporal bone on three‐dimensional T1‐weighted imaging with volume isotropic turbo spin echo acquisition than that with fast field echo at 3.0 tesla MRI

Haneda¹,

Ishikawa²,

Okamoto

2019

J Med Imag Rad Onc

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Introduction Three‐dimensional (3D) T1‐weighted imaging (T1WI) is used for evaluation of the facial nerve. The signal intensity of normal and pathological facial nerves has been well evaluated at both 1.5T and 3.0T MRI after gadolinium (Gd)‐enhancement with various pulse sequences. However, the continuity of the facial nerve has not been evaluated on 3D‐T1WI. This study aims to compare the continuity of the normal facial nerve in the temporal bone demonstrated on T1‐weighted volume isotropic turbo spin echo acquisition (T1‐VISTA), which is a spin‐echo sequence, to that on T1‐weighted fast field echo (T1‐FFE), which is a gradient‐echo sequence, at 3.0T MRI. Methods Forty‐four normal facial nerves in 22 healthy volunteers were imaged with both sequences using 3.0T MRI without Gd‐enhancement. The facial nerves were evaluated visually by two neuroradiologists in four anatomical segments with a 3‐point grading system of continuity. The continuity was assessed by summing the grades of the four segments as a total score. The grades at each segment and the total scores were compared statistically between the T1‐VISTA and T1‐FFE. Results The grades in all segments and the total score were significantly higher with T1‐VISTA than those with T1‐FFE. Conclusions T1‐VISTA was superior to demonstrate the facial nerve as a continuous anatomical structure in the temporal bone at 3.0T MRI.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Better continuity of the facial nerve demonstrated in the temporal bone on three‐dimensional T1‐weighted imaging with volume isotropic turbo spin echo acquisition than that with fast field echo at 3.0 tesla MRI

Haneda¹,

Ishikawa²,

Okamoto

2019

J Med Imag Rad Onc

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Enhanced fallopian canal as a potential marker for temporal bone vasculitis

Fujikawa

Honda

Ito

et al. 2020

Laryngoscope Investig Oto

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Objectives: This study aimed to test the hypothesis that contrast-enhanced 3D MRI with gradient-echo sequences (CE-3D-GRE) can detect signs of vasculitis in the fallopian canal, which may cause otologic involvement, in four patients with antineutrophil cytoplasmic antibody-associated vasculitis (AAV). Methods: CE-3D-GRE acquired at 3.0 Tesla was performed on four patients diagnosed with granulomatosis with polyangiitis or eosinophilic granulomatosis with polyangiitis, at onset or relapse of the disease, and in remission. Clinical correlations between otologic symptoms and radiological findings were examined for each patient. Furthermore, signal intensity of the mastoid segment of the fallopian canal was compared between the ears with active disease (n = 3) and those in remission or without vasculitis (n = 3). Results: Intense enhancement in the tympanic and mastoid segments of the fallopian canal was associated with development of external otitis, otitis media, and sensorineural hearing loss, and was unrelated to the presence of facial paresis. Maximal intensity projection images visualized the close relationship between the enhanced fallopian canal and middle ear inflammation. The findings were absent in remission. Signal intensity of the mastoid segment of the fallopian canal was higher in ears with active disease than in normal ears (P < .001) and decreased to normal levels during remission (P = .597). Conclusion: CE-3D-GRE can demonstrate vasculitis in the temporal bone, reflecting disease activity and the severity of otologic manifestations, including cochlear involvement, in AAV patients. Intense enhancement of the fallopian canal on CE-3D-GRE can be a potential marker for vasculitis of the temporal bone.

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Intratemporal Facial Nerve Enhancement

2017

Diagnostic Imaging: Head and Neck

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Redefining Normal Facial Nerve Enhancement: Healthy Subject Comparison of Typical Enhancement Patterns—Unenhanced and Contrast-Enhanced Spin-Echo Versus 3D Inversion Recovery–Prepared Fast Spoiled Gradient-Echo Imaging

Cited by 20 publications

References 13 publications

Better continuity of the facial nerve demonstrated in the temporal bone on three‐dimensional T1‐weighted imaging with volume isotropic turbo spin echo acquisition than that with fast field echo at 3.0 tesla MRI

Better continuity of the facial nerve demonstrated in the temporal bone on three‐dimensional T1‐weighted imaging with volume isotropic turbo spin echo acquisition than that with fast field echo at 3.0 tesla MRI

Enhanced fallopian canal as a potential marker for temporal bone vasculitis

Intratemporal Facial Nerve Enhancement

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