The Clinical Application Of Enhanced MRI With3.0T SPACE In Brachial Plexus Postganglionic Nerve And Its Non-traumatic Lesions

Objective: to study the clinical application of enhanced MRI in brachial plexuswith3.0T SPACE in brachial plexus postganglionic nerveMethods: selecting23examiners from those who accept the MRI of brachialplexus in our hospital with3.0T using3D–STIR SPACE enhanced sequence andwhose unilateral or bilateral brachial plexus is(are) normal (Group A).Then selecting21examiners from those who accept DWIBS sequence and their unilateral or bilateralbrachial plexus is(are) normal (Group B).Then process the images obtained from3D-STIR SPACE and DWIBS sequence with MPR、MIP、VR and CPR.Statistic thedisplay rate of the nerve root,stem,and subclavian segment of brachial plexus,thebackground suppression situation and the display situation (whether the form andsharp edges is displayed clearly)in the two different sequence with MIP. UseSPSS17.0statistical software to analyze, if the P value <0.05is consideredstatistically significant.Results: the display rate of the nerve root,stem,and subclavian segment of brachialplexus of the Group A is98.3%、94.2%、91.3%,Samely,the result of Group Bis65.7%、52.4%、47.6%.And statistic the two results with chi-square test,the finalstatistic result shows the display rate of the brachial plexus of Group A is higher thanGroup B,and there is statistically significant.Additionally, the background suppressionsituation of the two sequences did not have statistically significant,but the displaysituation of the form of brachial plexus in the Group A is better than Group B,andstatistic them with rank sum test,the results show there is statistically significant.Sothe imaging quality of3D-STIR SPACE enhanced sequence is superior than DWIBSsequence.The application of3.0T SPACE MRN enhanced sequence can provides aricher informations about brachial plexus for us.Conclusion：1.There is significant difference in the the display rate of the nerve root,stem,and subclavian segment of brachial plexus between3D-STIR SPACE enhanced sequenceand DWIBS sequence. So we can use the3D-STIR SPACE enhanced scanningcombined with conventional sequences as a routine Screening program to check thebrachial plexus.2.3D-STIR SPACE enhanced sequence can show the brachial plexus moreclearly than DWIBS. Objective: to discuss the application of enhanced SPACE in non-traumaticbrachial plexopathiesMethods:24patients with non-traumatic brachial plexopathies wereretrospectively analysised.There are3Neurilemomas,1Neurofibroma and20thoracicoutlet syndrome(TOS). These cases were Confirmed by histopathological examinationor surgical exploration.All of them were accepted the brachial plexus MRN enhancedsequence and conventional sequences.then observe the corresponding MRI findings ofthe lesionsResults:3cases of Neurilemomas are located on the middle trunk of the leftbrachial plexus、the middle trunk of the right brachial plexus and the left C5rootrespectively.1Neurofibroma Originates in the lower trunk of the right brachial plexus.The growth direction of Tumors coincide with the long axis of the parent nerve fibers.Tumors show equal or lower signal in T1WI and inhomogeneous mixed higher signalsin T2WI. And the enhancement of tumors show uneven mild enhancement in the3D-STIR SPACE enhanced sequence.6cases of the20TOS cases showed normal in the MRI.8cases only show the signal of the nerve are higher.6patients of themhave increased signal and morphological thickening samely.Conclusion：The SPACE sequence can show the lesion location, the scope and therelationship with the surrounding structures.So the MRN sequence of brachial plexuscan provide a richer image informations about the associated lesions of brachialplexus and can help us to diagnose and treat.