1
|
Zohbi N, Castilho A, Kim S, Saindane AM, Allen JW, Hoch MJ, Weinberg BD. Cranial nerve abnormalities in spontaneous intracranial hypotension and their clinical relevance. J Neuroimaging 2023. [DOI: 10.1111/jon.13102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2023] [Revised: 02/27/2023] [Accepted: 03/10/2023] [Indexed: 03/29/2023] Open
|
2
|
Rath TJ, Policeni B, Juliano AF, Agarwal M, Block AM, Burns J, Conley DB, Crowley RW, Dubey P, Friedman ER, Gule-Monroe MK, Hagiwara M, Hunt CH, Jain V, Powers WJ, Rosenow JM, Taheri MR, DuChene Thoma K, Zander D, Corey AS. ACR Appropriateness Criteria® Cranial Neuropathy: 2022 Update. J Am Coll Radiol 2022; 19:S266-S303. [PMID: 36436957 DOI: 10.1016/j.jacr.2022.09.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2022] [Accepted: 09/07/2022] [Indexed: 11/27/2022]
Abstract
Cranial neuropathy can result from pathology affecting the nerve fibers at any point and requires imaging of the entire course of the nerve from its nucleus to the end organ in order to identify a cause. MRI with and without intravenous contrast is often the modality of choice with CT playing a complementary role. The ACR Appropriateness Criteria are evidence-based guidelines for specific clinical conditions that are reviewed annually by a multidisciplinary expert panel. The guideline development and revision process support the systematic analysis of the medical literature from peer-reviewed journals. Established methodology principles such as Grading of Recommendations Assessment, Development, and Evaluation or GRADE are adapted to evaluate the evidence. The RAND/UCLA Appropriateness Method User Manual provides the methodology to determine the appropriateness of imaging and treatment procedures for specific clinical scenarios. In those instances in which peer-reviewed literature is lacking or equivocal, experts may be the primary evidentiary source available to formulate a recommendation.
Collapse
Affiliation(s)
- Tanya J Rath
- Division Chair of Neuroradiology, Mayo Clinic Arizona, Phoenix, Arizona.
| | - Bruno Policeni
- Panel Chair; Department of Radiology Vice-Chair, University of Iowa Hospitals and Clinics, Iowa City, Iowa; President Iowa Radiological Society and ACR Councilor
| | - Amy F Juliano
- Panel Vice-Chair, Massachusetts Eye and Ear, Harvard Medical School, Boston, Massachusetts; NI-RADS committee chair
| | - Mohit Agarwal
- Froedtert Memorial Lutheran Hospital Medical College of Wisconsin, Milwaukee, Wisconsin; Fellowship Program Director
| | - Alec M Block
- Stritch School of Medicine Loyola University Chicago, Maywood, Illinois
| | - Judah Burns
- Montefiore Medical Center, Bronx, New York; Vice-Chair for Education & Residency Program Director, Montefiore Medical Center; Vice-Chair, Subcommittee on Methodology
| | - David B Conley
- Practice Director, Northwestern ENT and Rhinology Fellowship Director, Northwestern University Feinberg School of Medicine, Chicago, Illinois; and Member, American Academy of Otolaryngology-Head and Neck Surgery
| | - R Webster Crowley
- Rush University Medical Center, Chicago, Illinois; Neurosurgery expert; Chief, Cerebrovascular and Endovascular Neurosurgery; Medical Director, Department of Neurosurgery; Surgical Director, Rush Comprehensive Stroke Center; Program Director, Endovascular Neurosurgery
| | | | - Elliott R Friedman
- University of Texas Health Science Center, Houston, Texas; Diagnostic Radiology Residency Program Director
| | - Maria K Gule-Monroe
- The University of Texas MD Anderson Cancer Center, Houston, Texas; Medical Director of Diagnostic Imaging at Houston Area Location Woodlands
| | - Mari Hagiwara
- Neuroradiology Fellowship Program Director and Head and Neck Imaging Director, New York University Langone Medical Center, New York, New York
| | | | - Vikas Jain
- MetroHealth Medical Center, Cleveland, Ohio; Medical Director, Lumina Imaging
| | - William J Powers
- University of North Carolina School of Medicine, Chapel Hill, North Carolina; American Academy of Neurology
| | - Joshua M Rosenow
- Neuroradiology Fellowship Program Director and Head and Neck Imaging Director, Northwestern University Feinberg School of Medicine, Chicago, Illinois
| | - M Reza Taheri
- George Washington University Hospital, Washington, District of Columbia; Director of Neuroradiology
| | - Kate DuChene Thoma
- Director of Faculty Development Fellowship, University of Iowa Hospital, Iowa City, Iowa; Primary care physician
| | - David Zander
- Chief of Head and Neck Radiology, University of Colorado Denver, Denver, Colorado
| | - Amanda S Corey
- Specialty Chair, Atlanta VA Health Care System and Emory University, Atlanta, Georgia
| |
Collapse
|
3
|
Munawar K, Raz E, Dehkharghani S, Fatterpekar GM, Block TK, Lui YW. Radial spoiled gradient T1 weighted imaging of the internal auditory canal: Is Scarpa's ganglion now an expected finding and source of fundal enhancement? Neuroradiol J 2022; 35:563-565. [PMID: 35015577 PMCID: PMC9513923 DOI: 10.1177/19714009211067407] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
StarVIBE is a 3D gradient-echo sequence with a radial, stack-of-stars acquisition having spatial resolution and tissue contrast. With newer sequences, it is important to be familiar with sequence tissue contrasts and appearance of anatomical variants. We evaluated 450 patients utilizing this sequence; 35 patients demonstrated fluffy "cotton wool" enhancement at the internal auditory canal fundus without clear pathology. We favor this represents anatomic neurovascular enhancement that StarVIBE is sensitive to and is a touch-me-not finding.
Collapse
Affiliation(s)
- Kamran Munawar
- Department of Radiology, New York University Medical Center, New York, NY, USA
| | - Eytan Raz
- Department of Radiology, New York University Medical Center, New York, NY, USA
| | - Seena Dehkharghani
- Department of Radiology, New York University Medical Center, New York, NY, USA
| | | | - Tobias K Block
- Department of Radiology, New York University Medical Center, New York, NY, USA
| | - Yvonne W Lui
- Department of Radiology, New York University Medical Center, New York, NY, USA
| |
Collapse
|
4
|
Ozgen Mocan B. Imaging Anatomy and Pathology of the Intracranial and Intratemporal Facial Nerve. Neuroimaging Clin N Am 2021; 31:553-570. [PMID: 34689933 DOI: 10.1016/j.nic.2021.06.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
The facial nerve is one of the most complex cranial nerves, with motor, sensory, and parasympathetic fibers. A large spectrum of congenital, inflammatory, vascular, and neoplastic processes may affect one or more segments of the nerve. Customized use of computed tomography and magnetic resonance imaging combined with good understanding of the nerve anatomy and relevant clinical/surgical key points is crucial for appropriate assessment of facial neuropathy. This article reviews the anatomy of the intracranial and intratemporal facial nerve, and the imaging features of the most frequent disorders involving those segments of the nerve.
Collapse
Affiliation(s)
- Burce Ozgen Mocan
- Department of Radiology, University of Illinois at Chicago, 1740 West Taylor Street, MC 931, Chicago, IL 60612, USA.
| |
Collapse
|
5
|
Lee SA, Jo SW, Chang SK, Kwon KH. Improvement of the Diagnostic Performance of Facial Neuritis Using Contrast-Enhanced 3D T1 Black-Blood Imaging: Comparison with Contrast-Enhanced 3D T1-Spoiled Gradient-Echo Imaging. J Clin Med 2021; 10:jcm10091850. [PMID: 33923134 PMCID: PMC8141108 DOI: 10.3390/jcm10091850] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2021] [Revised: 04/21/2021] [Accepted: 04/21/2021] [Indexed: 11/17/2022] Open
Abstract
This study aims to investigate the diagnostic ability of the contrast-enhanced 3D T1 black-blood fast spin-echo (T1 BB-FSE) sequence compared with the contrast-enhanced 3D T1-spoiled gradient-echo (CE-GRE) sequence in patients with facial neuritis. Forty-five patients with facial neuritis who underwent temporal bone MR imaging, including T1 BB-FSE and CE-GRE imaging, were examined. Two reviewers independently assessed the T1 BB-FSE and CE-GRE images in terms of diagnostic performance, and qualitative (diagnostic confidence and visual asymmetric enhancement) and quantitative analysis (contrast-enhancing lesion extent of the canalicular segment of the affected facial nerve (LEC) and the affected side-to-normal signal intensity ratio (rSI)). The AUCs of each reviewer, and the sensitivity and accuracy of T1 BB-FSE were significantly superior to those of CE-GRE (p < 0.05). Regarding diagnostic confidence and visual asymmetric enhancement, T1 BB-FSE tended to be rated greater than CE-GRE (p < 0.05). Additionally, in quantitative analysis, LEC and rSI of the canalicular segment on T1 BB-FSE were larger than those on CE-GRE (p < 0.05). The T1 BB-FSE sequence was significantly superior to the CE-GRE sequence, with more conspicuous lesion visualization in terms of both qualitative and quantitative aspects in patients with facial neuritis.
Collapse
Affiliation(s)
- Seun-Ah Lee
- Department of Radiology, Dongtan Sacred Heart Hospital, Hallym University Medical Center, 7, Keunjaebong-gil, Hwaseong-si 18450, Gyeonggi-do, Korea; (S.-A.L.); (S.-K.C.)
| | - Sang-Won Jo
- Department of Radiology, Dongtan Sacred Heart Hospital, Hallym University Medical Center, 7, Keunjaebong-gil, Hwaseong-si 18450, Gyeonggi-do, Korea; (S.-A.L.); (S.-K.C.)
- Correspondence: ; Tel.: +82-032-8086-2588
| | - Suk-Ki Chang
- Department of Radiology, Dongtan Sacred Heart Hospital, Hallym University Medical Center, 7, Keunjaebong-gil, Hwaseong-si 18450, Gyeonggi-do, Korea; (S.-A.L.); (S.-K.C.)
| | - Ki-Han Kwon
- Department of Neurology, Dongtan Sacred Heart Hospital, Hallym University Medical Center, 7, Keunjaebong-gil, Hwaseong-si 18450, Gyeonggi-do, Korea;
| |
Collapse
|
6
|
Warne R, Carney OM, Wang G, Connor S. Enhancement patterns of the normal facial nerve on three-dimensional T1W fast spin echo MRI. Br J Radiol 2021; 94:20201025. [PMID: 33502914 PMCID: PMC8173676 DOI: 10.1259/bjr.20201025] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Objectives: With increasing neuroimaging applications of contemporary three-dimensional T1W fast spin echo (3D T1W FSE) sequences, it was aimed to reappraise the normal patterns of skull base facial nerve gadolinium enhancement. Methods: Pre- and post-gadolinium 3D T1W fast spin echo imaging studies (n = 64) were retrospectively analysed in patients without suspected facial nerve pathology. Two independent observers scored the signal at each of six skull base facial nerve segments. Wilcoxon signed-rank test was used to compare changes in signal between pre- and post-gadolinium sequences at each location, and how this differed between proprietary sequences or between the pairs of facial nerves. Results: There was significant enhancement at the fundal canalicular (16%), geniculate ganglion (96%), tympanic (45%) and mastoid (38%) facial nerve segments (p < 0.05). Two different proprietary sequences demonstrated similar patterns of enhancement and there was symmetry between the two sides. Conclusions: There is a differing pattern of normal facial nerve enhancement on contemporary 3D T1W FSE sequences compared to previous studies of 2D T1W SE imaging and fundal canalicular enhancement may be physiological. Advances in knowledge: This is the first study to evaluate patterns of normal facial nerve enhancement using contemporary 3D T1W FSE MRI sequences.
Collapse
Affiliation(s)
- Richard Warne
- Department of Neuroradiology, King's College Hospital, NHS Foundation Trust, London, UK
| | - Olivia Mary Carney
- Department of Neuroradiology, King's College Hospital, NHS Foundation Trust, London, UK
| | - George Wang
- Department of Biostatistics, University of Sydney, School of Public Health, Sydney, New South Wales, Australia
| | - Steve Connor
- Department of Neuroradiology, King's College Hospital, NHS Foundation Trust, London, UK.,School of Biomedical Engineering and Imaging Sciences, St Thomas' Hospital, King's College London, London, UK
| |
Collapse
|
7
|
Fujikawa T, Honda K, Ito T, Kishino M, Kimura N, Umezawa N, Hirano M, Aoki N, Kawashima Y, Tsutsumi T. Enhanced fallopian canal as a potential marker for temporal bone vasculitis. Laryngoscope Investig Otolaryngol 2020; 5:1168-1175. [PMID: 33364409 PMCID: PMC7752078 DOI: 10.1002/lio2.489] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Revised: 10/23/2020] [Accepted: 10/23/2020] [Indexed: 12/02/2022] Open
Abstract
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. LEVEL OF EVIDENCE 5.
Collapse
Affiliation(s)
- Taro Fujikawa
- Department of OtolaryngologyTokyo Medical and Dental UniversityTokyoJapan
| | - Keiji Honda
- Department of OtolaryngologyTokyo Medical and Dental UniversityTokyoJapan
| | - Taku Ito
- Department of OtolaryngologyTokyo Medical and Dental UniversityTokyoJapan
| | - Mitsuhiro Kishino
- Department of RadiologyTokyo Medical and Dental UniversityTokyoJapan
| | - Naoki Kimura
- Department of RheumatologyTokyo Medical and Dental UniversityTokyoJapan
| | - Natsuka Umezawa
- Department of RheumatologyTokyo Medical and Dental UniversityTokyoJapan
| | - Mana Hirano
- Department of RheumatologyNational Defence Medical CollegeTokorozawaJapan
| | - Natsuki Aoki
- Department of OtolaryngologyTokyo Medical and Dental UniversityTokyoJapan
| | | | - Takeshi Tsutsumi
- Department of OtolaryngologyTokyo Medical and Dental UniversityTokyoJapan
| |
Collapse
|
8
|
Tomita H, Detmar K, Manava P, Nakajima Y, Lell M, Adamus R. Predictive Value of VIBE using Subtraction to Evaluate Idiopathic Facial Palsy after Starting Therapy. ROFO-FORTSCHR RONTG 2020; 192:1183-1189. [DOI: 10.1055/a-1160-6047] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Purpose To determine the predictive value of 3-dimensional spoiled gradient-echo volumetric interpolated breath-hold examination (VIBE) using subtraction to evaluate the short-term effect of therapy for facial palsy.
Materials and Methods We included 97 patients with idiopathic facial palsy (52 male, 45 female; aged 50.7 ± 19.4 years) who underwent MR imaging with a contrast agent after starting therapy. The mean interval between onset and therapy was 1.55 ± 1.69 days, between therapy and MR imaging was 3.19 ± 2.78 days, and between MR imaging and assessment of the therapeutic effect was 3.50 ± 0.71 days. The degree of therapeutic effect was determined using a 4-grade scale based on the House–Brackmann scale for grading facial nerve function. Two radiologists reviewed VIBE with pre- and postcontrast subtraction using the 4-point scale. We evaluated the diagnostic performance and compared the degree of therapeutic effect and enhancement of facial nerves that were divided into 5 segments bilaterally.
Results We identified 98 facial palsy initially and significant enhancement in 55 facial nerves after the start of therapy and residual palsy in 87. Sensitivity for all facial palsy was 62.0 %, specificity was 90.9 %, positive predictive value was 98.2 %, negative predictive value was 23.3 %, and accuracy was 65.3 %. Eleven patients recovered completely, 1 showed significant enhancement, and the remaining 10 did not show significant enhancement of the facial nerve.
Conclusion VIBE has a potential to predict the prognostic outcome and assess facial palsy after the start of therapy.
Key points:
Citation Format
Collapse
Affiliation(s)
- Hayato Tomita
- Radiology and Nuclear Medicine, Klinikum Nuernberg, Paracelsus Medical University, Nürnberg, Germany
- Radiology, St. Marianna University School of Medicine, Kawasaki, Japan
| | - Klaus Detmar
- Radiology and Nuclear Medicine, Klinikum Nuernberg, Paracelsus Medical University, Nürnberg, Germany
| | - Panagiota Manava
- Radiology and Nuclear Medicine, Klinikum Nuernberg, Paracelsus Medical University, Nürnberg, Germany
| | - Yasuo Nakajima
- Radiology, St. Marianna University School of Medicine, Kawasaki, Japan
| | - Michael Lell
- Radiology and Nuclear Medicine, Klinikum Nuernberg, Paracelsus Medical University, Nürnberg, Germany
- Radiology, Erlangen University Hospital, Erlangen, Germany
| | - Ralf Adamus
- Radiology, Erlangen University Hospital, Erlangen, Germany
| |
Collapse
|
9
|
Imaging the facial nerve: A contemporary review of anatomy and pathology. Eur J Radiol 2020; 126:108920. [PMID: 32199143 DOI: 10.1016/j.ejrad.2020.108920] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2019] [Revised: 12/07/2019] [Accepted: 02/24/2020] [Indexed: 11/23/2022]
Abstract
PURPOSE The facial nerve is the seventh paired cranial nerve which anatomically can be divided into six distinct segments. There are a wide range of pathologies that may occur along each segment of the nerve. The aim of this pictorial review is to untangle the complex appearances of the facial nerve, both in its normal anatomical course and when affected by pathology. METHOD This review takes an evidence-based segmental approach to the evaluation of the facial nerve in terms of its anatomy and clinical features of common pathologies affecting specific segments of the nerve. The typical multimodal radiological findings of common facial nerve pathologies are included in the review using imaging from select pathologically confirmed cases. RESULTS A wide range of pathologies ranging from congenital abnormalities to inflammatory, infective and neoplastic processes can affect the facial nerve. As select segments of the nerve are better evaluated on certain imaging modalities a clear understanding of the anatomy and clinical features associated with specific facial nerve pathologies enables the radiologist to tailor the imaging test to best answer the clinical question. CONCLUSIONS This review provides a segmental clinical-radiological approach to imaging the facial nerve. In addition, recent developments in facial nerve imaging that may come into mainstream use in the near future are touched upon.
Collapse
|
10
|
Haneda J, Ishikawa K, Okamoto K. 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. J Med Imaging Radiat Oncol 2019; 63:745-750. [PMID: 31587502 DOI: 10.1111/1754-9485.12962] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2019] [Revised: 08/24/2019] [Accepted: 09/07/2019] [Indexed: 11/28/2022]
Abstract
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.
Collapse
Affiliation(s)
- Jun Haneda
- Department of Radiology, Nagaoka Chuo General Hospital, Nagaoka, Japan
| | | | - Kouichirou Okamoto
- Department of Translational Research, Center for Bioresource-based Researches, Brain Research Institute, Niigata University, Niigata, Japan
| |
Collapse
|
11
|
Guenette JP, Seethamraju RT, Jayender J, Corrales CE, Lee TC. MR Imaging of the Facial Nerve through the Temporal Bone at 3T with a Noncontrast Ultrashort Echo Time Sequence. AJNR Am J Neuroradiol 2018; 39:1903-1906. [PMID: 30139756 DOI: 10.3174/ajnr.a5754] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2018] [Accepted: 06/03/2018] [Indexed: 11/07/2022]
Abstract
The pointwise encoding time reduction with radial acquisition (PETRA) ultrashort echo time MR imaging sequence at 3T enables visualization of the facial nerve from the brain stem, through the temporal bone, to the stylomastoid foramen without intravenous contrast. Use of the PETRA sequence, or other ultrashort echo time sequences, should be considered in the MR imaging evaluation of certain skull base tumors and perhaps other facial nerve and temporal bone pathologies.
Collapse
Affiliation(s)
- J P Guenette
- From the Division of Neuroradiology (J.P.G., J.J., T.C.L.)
| | - R T Seethamraju
- Siemens Medical Solutions USA, Inc. (R.T.S.), Boston, Massachusetts
| | - J Jayender
- From the Division of Neuroradiology (J.P.G., J.J., T.C.L.)
| | - C E Corrales
- Division of Otolaryngology-Head and Neck Surgery (C.E.C.), Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts
| | - T C Lee
- From the Division of Neuroradiology (J.P.G., J.J., T.C.L.)
| |
Collapse
|
12
|
Radhakrishnan R, Ahmed S, Tilden JC, Morales H. Comparison of normal facial nerve enhancement at 3T MRI using gadobutrol and gadopentetate dimeglumine. Neuroradiol J 2017; 30:554-560. [PMID: 28696161 DOI: 10.1177/1971400917719714] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Background and purpose The facial nerve is unique among cranial nerves in demonstrating normal enhancement of particular segments. The effect of varying T1 relaxivities of gadolinium-based contrast agents on facial nerve enhancement is unclear. In this study, we assess differences in normal facial nerve enhancement with two different gadolinium-based contrast agents, gadobutrol and gadopentetate dimeglumine. In addition, we evaluate differences in facial nerve enhancement with spin-echo (SE) T1 versus 3D inversion recovery prepared fast spoiled gradient-echo (FSPGR) post-contrast sequences. Methods A total of 140 facial nerves in 70 individuals were evaluated (70 with gadobutrol and 70 with gadopentetate dimeglumine) by two blinded reviewers. Differences in enhancement of facial nerve segments between the two agents were analyzed. Differences in enhancement between SE T1 and FSPGR imaging were also evaluated. Results There was no significant difference in facial nerve enhancement between gadobutrol and gadopentetate dimeglumine. Enhancement was commonly observed in the geniculate, tympanic and mastoid segments (98%-100%) with either contrast agent; enhancement was less common in the labyrinthine segments (9%-14%) and lateral canalicular segment (2%-5%). There was a smaller enhancing proportion of labyrinthine and tympanic segments with FSPGR as compared to SE T1 images with gadobutrol. Conclusion There is no significant difference in overall enhancement of the facial nerve between gadobutrol and gadopentetate dimeglumine. Mild enhancement of the lateral canalicular portion of the facial nerve may be a normal finding. With FSPGR sequence, there is lesser perceived enhancement of the labyrinthine and tympanic segments of the facial nerve with gadobutrol.
Collapse
Affiliation(s)
- Rupa Radhakrishnan
- 1 Cincinnati Children's Hospital Medical Center, Department of Radiology, USA
| | - Shamima Ahmed
- 2 University of Cincinnati College of Medicine, Department of Radiology, USA
| | | | - Humberto Morales
- 2 University of Cincinnati College of Medicine, Department of Radiology, USA
| |
Collapse
|