A comparative study on the consistency of 3D MEDIC and 3D SPACEmagnetic resonance neurography imaging in lumbosacral plexus nerve roots

doi:10.3969/j.issn.1006-7795.2021.01.022

Abstract

Abstract: Objective To validate the feasibility and reproducibility of three dimensional multi-echo data imagine combination with selective water excitation (3D MEDIC WE)and three-dimensional sampling perfection with application optimized contrasts by using different flip angle evolution(3D SPACE STIR)sequence in lumbosacral plexus nerve root imaging. Methods Fifty-five subjects were undergone with two magnetic resonance neurography(MRN)sequences of lumbosacral plexus nerve roots to evaluate the signal to noise ratio(SNR),contrast to noise ratio(CNR)and contrast ratio(CR) of image quality parameters, and to validate the consistency of measurement of nerve root diameter in normal control (NC) group,chronic inflammatory demyelinating polyradiculoneuropathy(CIDP)group and lumbar disc herniation(LDH) group, respectively. Results The consistency of nerve root diameter measured by the two MRN sequences was higher (r=0.95 in NC group, r=0.99 in CIDP group, r=0.97 in LDH group, P<0.001). The image quality evaluation index showed that 3D space sequence was superior in the three indexes of SNR, CNR and CR, and the image quality score of 3D medic qualitative evaluation was higher. Both the two sequences can clearly show the normal lumbosacral plexus nerve root, the diffuse morphological thickening nerve root and the compressed nerve root caused by the disc herniation. Conclusion 3DMEDIC and 3D SPACE sequences can be used in the assessment of lumbosacral plexus nerve root imaging. The two sequences have high feasibility and reproducibility in the evaluation of normal and abnormal shape and course of nerve root. Considering the all-round evaluation of clinical images, we can choose the best sequence to provide image support.

Key words: 3D MEDIC WE, 3D SPACE STIR, lumbosacral plexus nerve root

CLC Number:

Sun Zheng, Kong Chao, Lu Shibao, Chen Hai, Da Yuwei, Zhang Miao, Lu Jie. A comparative study on the consistency of 3D MEDIC and 3D SPACEmagnetic resonance neurography imaging in lumbosacral plexus nerve roots[J]. Journal of Capital Medical University, 2021, 42(1): 131-137.

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URL: https://journal03.magtech.org.cn/Jweb_sdykdxxb/EN/10.3969/j.issn.1006-7795.2021.01.022

https://journal03.magtech.org.cn/Jweb_sdykdxxb/EN/Y2021/V42/I1/131

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