Application Value of Different MRI Imaging Sequences in the Diagnosis of Vascular Compression Trigeminal Neuralgia
Objective:To investigate the application value of different MRI sequences in the diagnosis of vascular compression trigeminal neuralgia.Method:Fifty-eight patients with trigeminal neuralgia who admitted to Xianning First People's Hospital from March 2018 to June 2019 were selected as research objects.All patients underwent MRI brain scan before microvascular decompression(MVD),MRI plain scan was performed first,then,three-dimensional fast equilibrium steady-state imaging(3D-FIESTA)sequence and three-dimensional time-of-flight destructive steady-state gradient echo(3D-TOF-SPGR)sequence were used for scanning,and then Gadopentetate Dimeglumine Injection was intravenously injected,finally,3D-TOF-SPGR sequence was used for scanning again,that is,the enhanced three-dimensional time-of-flight destructive steady-state gradient echo(3D-CE-TOF-SPGR)sequence.The sensitivity,specificity,accuracy,positive predictive value and negative predictive value of three sequences in the judgment of the relationship between the nerve and blood vessel of patients were calculated by using the relationship between nerve and blood vessel seen in MVD as the gold standard,and the consistency among three sequences and the diagnosis seen in MVD was calculated respectively.Then,the display rate of the three sequences to the responsible vessels was calculated according to the golden standard.Result:The sensitivity,accuracy and negative predictive value of three sequences were:3D-CE-TOF-SPGR>3D-TOF-SPGR>3D-FIESTA,the specificity and positive predictive value of three sequences were all 100.0%.The Kappa value of 3D-FIESTA sequence was less than 0.4,which was not consistent with MVD results;the Kappa value of 3D-TOF-SPGR and 3D-CE-TOF-SPGR sequence were between 0.4 and 0.7,which was consistent with MVD results moderately,and 3D-CE-TOF-SPGR sequence was the best.The display rate of three sequences for single artery were higher,among which 3D-TOF-SPGR and 3D-CE-TOF-SPGR sequences reached 100.0%,while 3D-CE-TOF-SPGR sequence was the highest for two or more arteries and the combination of arteries and veins.Conclusion:Compared with 3D-FIESTA and 3D-TOF-SPGR sequence,3D-CE-TOF-SPGR sequence has higher diagnostic efficiency,and it can show the responsible vessels more clearly.
Trigeminal neuralgiaVascular compressionMagnetic resonance tomographic angiographyThree dimensional time of flight
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