DTI assessment of the maturing growth plate of the knee in adolescents and young adults

医学 部分各向异性 磁共振弥散成像 股骨 胫骨 人口 纤维束成像 口腔正畸科 解剖 核医学 放射科 外科 磁共振成像 环境卫生
作者
Ola Kvist,Torsten Dorniok,Johan Berglund,Ola Nilsson,Carl‐Erik Flodmark,Sandra Díaz
出处
期刊:European Journal of Radiology [Elsevier BV]
卷期号:162: 110759-110759 被引量:4
标识
DOI:10.1016/j.ejrad.2023.110759
摘要

To assess the growth plates of the knee in a healthy population of young adults and adolescents using DTI, and to correlate the findings with chronological age and skeletal maturation.A prospective, cross-sectional study to assess the tibial and femoral growth plates with DTI in 155 healthy volunteers aged between 14.0 and 21 years old. Echo-planar DTI with 15 directions and b value of 0 and 600 s/mm2 was performed on a 3 T whole-body scanner.A relationship was observed between chronological age and most DTI metrics (fractional anisotropy, mean diffusivity, and radial diffusivity), tract length and volume. (No significant relationship could be seen for axonal diffusivity and tract length.) Subdivision according to skeletal maturation showed the greatest tract lengths and volumes seen in stage 4b and not 4a. The intra-observer agreement was significant (P = 0.01) for all the measured variables, but agreement varied (femur 0.53 - 0.98; tibia 0.58 - 0.98). Spearman's correlation showed a significant correlation for age (P = 0.05; P = 0.01) as well as for the fractional anisotropy value within all variables in both femur and tibia. Tract number and volume had a similar correlation with most variables, especially the DTI metrics, and would seem to be interchangeable.The current study indicates that DTI metrics could be a tool to assess the skeletal maturation process of the growth plate and its activity. Tractography seems promising to assess the activity of the growth plate in a younger population but must be used with caution in the more mature growth plate.
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