Application Of 3.0T MRI 3D-STIR-SPACE Enhanced Sequence For Brachial Plexus Imaging,and The Diagnostic Value Of The Sequence For Brachial Plexus Injury

Part one: 3.0T MRI 3D-STIR-SPACE Enhanced Sequence for Brachial Plexus ImagingObjective To investigate the clinical feasibility of 3.0T MRI 3D-STIR-SPACE Enhanced Sequence for Brachial Plexus Imaging.Methods 30 normal subjects were scanned with 3.0T MRI 3D-STIR-SPACE plain scan and enhanced sequence for brachial plexus.The signals of C5-7 nerve and adjacent soft tissues were measured and the CNR values were calculated.At the same time,the brachial plexus imaging was scored,the plain and enhanced CNR and brachial plexus imaging scores were using self-matched t-test.Results The average CNR of 3D-STIR-SPACE plain and enhanced scan in 30 normal persons were 0.38 ± 0.14 and 0.63 ± 0.16 respectively,the average score of plain scan images was 1.8,and the average score of enhanced images was 4.3.There was statistically significant difference in the two groups(P<0.05=Conclusion 3.0T MRI 3D-STIR-SPACE enhanced sequence has a better background suppression effection,and it can clearly show the brachial plexus walking shape,conducive to the diagnosis of brachial plexus lesions.Part two:Diagnostic Value of 3.0T MRI 3D-STIR-SPACE Enhanced Sequence for Brachial Plexus InjuryObjective To investigate the accuracy,sensitivity and specificity of 3.0T MRI enhanced sequence of 3D-STIR-SPACE in the diagnosis of brachial plexus injury and to explore the diagnostic value of this sequence.Methods 28 cases of brachial plexus injury patients in The Second Hospital of Anhui Medical University,from November 2013 to July 2017,were analyzed retrospectively between the 3.0T MRI examination results and operations,all patients underwent 3.0T MRI scanning in 3D-T2W-STIR-SPACE enhanced sequence.Results In the 28 cases of brachial plexus injury,there were preganglionic brachial plexus 11 cases、 postganglionic brachial plexus 10 cases and mixed brachial plexus 7 cases.The accuracy,sensitivity and specificity of MRI in the diagnosing preganglionic brachial plexus injury were 76.8%,94.0%,and 31.6%,respectively.The accuracy,sensitivity and specificity of MRI in diagnosing postganglionic brachial plexus injury were 89.2%,89.5%,and 87.5%,respectively.Conclusion There are high accuracy and sensitivity in 3.0T MRI 3D-STIR-SPACE enhanced sequence for the diagnosis of brachial plexus injury.