Diagnostic value of dynamic contrast-enhanced MRI in Bell's palsy: initial experience

Abstract

To assess the ability of conventional magnetic resonance imaging (MRI) combined with dynamic contrast-enhanced (DCE)-MRI to accurately identify characteristic imaging findings of Bell's palsy particularly in involved segments. A retrospective analysis was performed on MRI images of patients with Bell's palsy in Shanghai Ninth People's Hospital from January 2015 to July 2019. DCE-MRI analysis was performed on a SIEMENS Workstation Extended MR Work Space 2.6.3.5 and by using the T1-weighted volumetric interpolated breath-hold examination (VIBE) sequence. Statistical analyses were performed by using SPSS v. 19.0. The chi-square test was used to compare the accuracy of conventional MRI versus DCE-MRI in imaging the involved segment of the facial nerve. Combined with the results of the surgery, the accuracy of conventional MRI in imaging the involved segments of the affected facial nerves was 38.5% (5/13), but was 92.3% (12/13) for DCE-MRI. There was a statistically significant difference between the two groups (chi-square value is 8.327, p=0.004). DCE-MRI is useful to diagnose the involved segments of the affected facial nerve accurately compared to the conventional MRI. This approach has advantages both for the patient, in terms of safety, and for the physician, in terms of the accuracy of the diagnosis.