The diagnostic value of 3D-FIESTA combined with 3D-TOF-MRA imaging in trigeminal nerve vascular compression

Objective:To evaluate the application value of 3.0 MRI 3D-FIESTA sequence combined with 3D-TOF-MRA imaging in the diagnosis of trigeminal nerve vascular compression.Methods:Sixty-three patients with trigeminal neuralgia were detected using 3.0 MRI 3D-FIESTA sequence combined with 3D-TOF-MRA scan,the responsibility blood vessel was analyzed using the relationship between trigeminal nerve and blood vessels,and which was compared with surgical results.Results:The positive diagnosis rates of vascular compression using MRI before operation and good standard diagnosis during operation in 63 cases were 82.5% and 87.30%,respectively,the difference of which was not statistically significant(χ²=0.558,P=0.558).In MRI imaging,the vascular compression in 40 cases,contact in 9 cases and suspected contact in 3 cases were found.Among the offending blood vessels,21 cases(40.38%) from superior cerebellar artery blood vessels,12 cases(23.07%) from anterior inferior cerebellar artery,6 cases(11.53%) from posterior inferior cerebellar artery,8 cases from vertebral-basilar artery and 5 cases(9.61%)from unknown artery around trigeminal nerve were identified.Among the offending blood vessels,23 cases(41.82%) from superior cerebellar artery,14 cases(25.46%) from anterior inferior cerebellar artery,5 cases(9.09%) from posterior inferior cerebellar artery,9 cases(16.36%) from vertebral-basilar artery and 4 case(7.27%) from unknown vascular compression were found during operation.Among 63 cases compared with the operation results,the preoperative MRI diagnosis in 15 cases(23.81%) was not in accord with intraoperative diagnosis.The diagnosis of preoperative free of oppression and intraoperative oppression showed 3 cases(4.76%) of superior cerebellar artery,1 case(1.59%) of posterior inferior cerebellar artery,2 cases(2.17%) of vertebral-basilar artery,4 cases(6.35%) of venous compression or arachnoid adhesion.The preoperative MRI diagnosis in 5 cases(7.94%) was not in accord with the offending blood vessel.Conclusions:The 3.0 MRI 3D-FIESTA sequence combined with 3D-TOF-MRA imaging technology can display the trigeminal nerve vascular compression,provide the accurate imaging basis in minimally invasive surgery.The diagnosis of offending blood vessel is still different because of the partial volume influence.