Magnetic Resonance Imaging Study on Patients With Hemifacial Spasm

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

RECRUITING

Total Enrollment

60 participants

Study Classification

OBSERVATIONAL

Study Start Date

2021-01-01

Study Completion Date

2024-12-30

Brief Summary

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Up to now, multiplanar reconstruction (MPR) has been widely used to detect the neurovascular compressions (NVC) on the patients with hemifacial spasm (HFS). However, due to lack of stereoscopic vision, this traditional method sometimes can not meet the requirement on identifying the details of NVC, especially when the aberrant vessels turn out to be veins not arteries. The three dimensional analytic techniques, such as curved planar reconstruction (CPR) and magnetic resonance virtual endoscopy (MRVE), may be helpful to improve the sensitivity and specificity on the demonstration of NVC with stereo and dynamic views, so as to assist the design of the surgical plan.

Furthermore, the frequent finding of NVC on MRI studies of asymptomatic patients incited the creation of several strict criteria for the imaging diagnosis of NVC: the vessel must cross perpendicular to the long axis of the nerve, the nerve must be deviated or indented at the root entry zoon (REZ) by the vessel. Alternatively, morphological measurement of the nerve may correlate with the severity of facial spasm due to atrophy of the nerve in most cases of HFS, and is likely secondary to the micro-structural abnormalities, such as axonal loss, demyelination, collagen deposition, etc. In this study, cross-sectional area (CSA) and volume (V) of the cisternal facial nerve will be assessed to determine whether it can be a useful biomarker for predicting the degree of HFS.

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Detailed Description

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Conditions

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Hemifacial Spasm Magnetic Resonance Imaging

Study Design

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Observational Model Type

CASE_CONTROL

Study Time Perspective

PROSPECTIVE

Study Groups

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Patients with MRI using two dimensional reconstruction

Scanning with magnetic resonance imaging

Intervention Type DEVICE

Facial nerves and adjacent blood vessels are scanned using MRI in the patients with hemifacial spasm (HFS). Then multiplanar reconstruction (two dimensional), along with curved planar reconstruction and magnetic resonance virtual endoscopy (three dimensional), will be performed in the different groups of HFS.

Patients with MRI using three dimensional reconstruction

Scanning with magnetic resonance imaging

Intervention Type DEVICE

Facial nerves and adjacent blood vessels are scanned using MRI in the patients with hemifacial spasm (HFS). Then multiplanar reconstruction (two dimensional), along with curved planar reconstruction and magnetic resonance virtual endoscopy (three dimensional), will be performed in the different groups of HFS.

Interventions

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Scanning with magnetic resonance imaging

Facial nerves and adjacent blood vessels are scanned using MRI in the patients with hemifacial spasm (HFS). Then multiplanar reconstruction (two dimensional), along with curved planar reconstruction and magnetic resonance virtual endoscopy (three dimensional), will be performed in the different groups of HFS.

Intervention Type DEVICE

Eligibility Criteria

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Inclusion Criteria

* Primary HFS patients according to medical history and typical facial muscle spasms that are unilateral, involuntary, and had intermittent contractions innervated by the ipsilateral facial nerve. The patient has 1 year disease duration at least.

Exclusion Criteria

* Secondary causes of HFS, such as tumors or cysts compressing the facial nerve in the cerebellar pontine cistern; Precarious general health status; Percutaneous lesions or surgical treatments; Cardiac pacemaker or metal implants.

Minimum Eligible Age

20 Years

Maximum Eligible Age

60 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No