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European Spine Journal
Published in: European Spine Journal 5/2019

01-05-2019 | Original Article

Diffusion kurtosis imaging provides quantitative assessment of the microstructure changes of disc degeneration: an in vivo experimental study

Authors: Li Li, Zhiguo Zhou, Jing Li, Jicheng Fang, Yuanyuan Qing, Tian Tian, Shun Zhang, Gang Wu, Alessandro Scotti, Kejia Cai, WenZhen Zhu

Published in: European Spine Journal | Issue 5/2019

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Abstract

Objective

Our aim was to assess the microstructural changes of intervertebral disc degeneration induced by annulus needle puncture in rats by diffusion kurtosis imaging (DKI).

Methods

Eighteen rats (36 discs) were punctured percutaneously at the intervertebral disc between C6/7, C7/8 (C-coccygeal vertebrae) with a 21-gauge needle. The rats were divided into six groups according to the time after the puncture: 3 h, 48 h, 3 days, 7 days, 10 days and 14 days. There were six discs in three rats in the control group. The rats’ tail was imaged at 3T MRI with T2-weighted and diffusion-weighted and diffusion kurtosis imaging (DWI)/DKI sequences. The discs were categorized using a five-grade degeneration system based on the T2 images. The height of the discs and the parameters in DWI/DKI were measured and compared between the different time points. The histological images were also obtained from the discs.

Results

The histological study revealed that the discs in the rat of the punctured groups were degenerated. The T2 grades of different groups presented an increasing trend from 7 to 10 days after puncture (R2 = 0.9424, P < 0.001), while the DWI/DKI parameters changes were consistent with the histological changes at the different time points and showed significant differences between the different groups (P < 0.05).

Conclusions

DKI provides quantitative assessment of the microstructure changes of disc degeneration, and it is a non-invasive method. The DKI multi-parameter analysis is sensitive to discs changes caused by puncture.

Graphical abstract

These slides can be retrieved under Electronic Supplementary Material.
Appendix
Available only for authorised users
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Metadata
Title
Diffusion kurtosis imaging provides quantitative assessment of the microstructure changes of disc degeneration: an in vivo experimental study
Authors
Li Li
Zhiguo Zhou
Jing Li
Jicheng Fang
Yuanyuan Qing
Tian Tian
Shun Zhang
Gang Wu
Alessandro Scotti
Kejia Cai
WenZhen Zhu
Publication date
01-05-2019
Publisher
Springer Berlin Heidelberg
Published in
European Spine Journal / Issue 5/2019
Print ISSN: 0940-6719
Electronic ISSN: 1432-0932
DOI
https://doi.org/10.1007/s00586-019-05924-3

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