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| The application research of enhanced 3D-FIESTA-c sequence MRI in displaying the preganglionic nerve of the brachial plexus |
| YAN Hai-long, YAN Rui-fang, REN Ji-peng, YUE Wei, ZHAI Zhan-sheng, XIA Lin-feng, HAN Dong-ming |
| Department of MRI, the First Affiliated Hospital of Xinxiang Medical University, Weihui Henan 453100, China |
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Abstract Objective: To investigate the feasibility and values of enhanced MRI using 3D-FIESTA-c sequence in displaying the preganglionic nerve of the brachial plexus. Methods: Twenty volunteers and 10 patients suffering from brachial plexus preganglionic injury underwent MRI using 3D-FIESTA, unenhanced and enhanced 3D-FIESTA-c sequences, respectively. The displaying number of the nerve bundle of anterior and posterior rootlets of brachial plexus and contrast noise ratio(CNR) and artifacts of images at the three sequences were evaluated. The signs of the normal brachial plexus preganglionic part and its lesions at contrast enhanced MRI using 3D-FIESTA-c sequence were observed. Results: 3D-FIESTA, unenhanced and enhanced 3D-FIESTA-c in number of the nerve bundle of anterior and posterior rootlets of the preganglionic nerve of the brachial plexus(C5～C8, T1) showed statistically significant. Unenhanced and enhanced 3D-FIESTA-c in number of the nerve bundle of anterior and posterior rootlets of the preganglionic nerve of the brachial plexus(C5～C8, T1) were more than 3D-FIESTA-c. And unenhanced and enhanced 3D-FIESTA-c in number of the nerve bundle of anterior and posterior rootlets of the preganglionic nerve of the brachial plexus(C5～C8, T1) had no statistical significance. The CNR of three sequences above were 39.44±6.65, 39.91±6.52, 25.92±6.95, respectively. The CNR of 3D-FIESTA, unenhanced and enhanced 3D-FIESTA-c in the preganglionic nerve of the brachial plexus showed statistically significant. The CNR of 3D-FIESTA, unenhanced 3D-FIESTA-c were more than enhanced 3D-FIESTA-c. And the CNR of 3D-FIESTA and unenhanced 3D-FIESTA-c had no statistical significance. Enhanced sequence 3D-FIESTA-c increased the muscle signal strength in the tissues of background, unfavorable to observe the normal brachial plexus preganglionic part and its lesions. Conclusion: Although unenhanced and enhanced 3D-FIESTA-c in number of the nerve bundle of anterior and posterior rootlets of the preganglionic nerve of the brachial plexus have no statistical significance. Due to their increased muscle signal strength in the tissues of background, the author thinks that it is good to perform 3D-FIESTA-c scanning before the enhancement.
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Received: 11 December 2014
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Corresponding Authors:
HAN Dong-ming
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2015, Vol. 26 
