STUDY DESIGN: Comparison of sodium concentration ([Na]) and proton T2 relaxation time between normal and degenerated discs in a rabbit model. OBJECTIVE: The purpose of this article was to evaluate quantitative [Na] and T2 characteristics of discs associated with degenerative changes. SUMMARY OF BACKGROUND DATA: Intervertebral disc degeneration is a common chronic condition that may lead to back pain, limited activity, and disability. Noninvasive imaging method to detect early intervertebral disc degeneration is vital to follow disease progression and guide clinical treatment and management. METHODS: Dual-tuned magnetic resonance imaging of rabbit discs was performed using 3T. Thirteen rabbits were included in the study; 6 control rabbits (24 normal discs) and 7 rabbits with annular puncture-induced disc degeneration (9 degenerated discs, 19 intact internal-control discs). Dual-tuned magnetic resonance imaging of discs was performed at baseline and 12-week poststab. [Na] and T2 were measured and compared among 3 groups of discs. RESULTS: The mean [Na] were 274.8 ± 40.2 mM for the normal discs, 247.2 ± 27.7 mM for the internal-control discs, and 190.6 ± 19.1 mM for the degenerated discs. The corresponding T2 for 3 groups were 97.1 ± 12.1 ms, 93.7 ± 11.9 ms, and 79.0 ± 9.1 ms, respectively. The [Na] is highly correlated with the T2 in the degenerated discs (r = 0.90, P < 0.01). The mean percent decreases from the normal to degenerated discs were in 30.6% in [Na] and 18.6% in T2, whereas those from the internal-control to degenerated discs were 22.9% in [Na] and 15.6% in T2. CONCLUSION: Although both [Na] and T2 changes in discs were associated with the disc-punctured rabbits, greater change in [Na] is observed at 12-week poststab compared with T2 change. Because T2 and [Na] reflect different disc properties, performing both imaging under same condition will be helpful in the evaluation of disc degeneration.
STUDY DESIGN: Comparison of sodium concentration ([Na]) and proton T2 relaxation time between normal and degenerated discs in a rabbit model. OBJECTIVE: The purpose of this article was to evaluate quantitative [Na] and T2 characteristics of discs associated with degenerative changes. SUMMARY OF BACKGROUND DATA: Intervertebral disc degeneration is a common chronic condition that may lead to back pain, limited activity, and disability. Noninvasive imaging method to detect early intervertebral disc degeneration is vital to follow disease progression and guide clinical treatment and management. METHODS: Dual-tuned magnetic resonance imaging of rabbit discs was performed using 3T. Thirteen rabbits were included in the study; 6 control rabbits (24 normal discs) and 7 rabbits with annular puncture-induced disc degeneration (9 degenerated discs, 19 intact internal-control discs). Dual-tuned magnetic resonance imaging of discs was performed at baseline and 12-week poststab. [Na] and T2 were measured and compared among 3 groups of discs. RESULTS: The mean [Na] were 274.8 ± 40.2 mM for the normal discs, 247.2 ± 27.7 mM for the internal-control discs, and 190.6 ± 19.1 mM for the degenerated discs. The corresponding T2 for 3 groups were 97.1 ± 12.1 ms, 93.7 ± 11.9 ms, and 79.0 ± 9.1 ms, respectively. The [Na] is highly correlated with the T2 in the degenerated discs (r = 0.90, P < 0.01). The mean percent decreases from the normal to degenerated discs were in 30.6% in [Na] and 18.6% in T2, whereas those from the internal-control to degenerated discs were 22.9% in [Na] and 15.6% in T2. CONCLUSION: Although both [Na] and T2 changes in discs were associated with the disc-punctured rabbits, greater change in [Na] is observed at 12-week poststab compared with T2 change. Because T2 and [Na] reflect different disc properties, performing both imaging under same condition will be helpful in the evaluation of disc degeneration.
Authors: Satoshi Sobajima; John F Kompel; Joseph S Kim; Corey J Wallach; Douglas D Robertson; Molly T Vogt; James D Kang; Lars G Gilbertson Journal: Spine (Phila Pa 1976) Date: 2005-01-01 Impact factor: 3.468
Authors: Nam V Vo; Robert A Hartman; Prashanti R Patil; Makarand V Risbud; Dimitris Kletsas; James C Iatridis; Judith A Hoyland; Christine L Le Maitre; Gwendolyn A Sowa; James D Kang Journal: J Orthop Res Date: 2016-08-12 Impact factor: 3.494
Authors: Lloydine Jacobs; Nam Vo; Joao Paulo Coelho; Qing Dong; Bernard Bechara; Barrett Woods; Eric Hempen; Robert Hartman; Harry Preuss; Judith Balk; James Kang; Gwendolyn Sowa Journal: Spine (Phila Pa 1976) Date: 2013-05-20 Impact factor: 3.468
Authors: Naomi N Lee; Elias Salzer; Frances C Bach; Andres F Bonilla; James L Cook; Zulma Gazit; Sibylle Grad; Keita Ito; Lachlan J Smith; Andrea Vernengo; Hans-Joachim Wilke; Julie B Engiles; Marianna A Tryfonidou Journal: JOR Spine Date: 2021-06-14