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ID 51081
file
creator
Ota, Yuki
Kanemitsu, Munekazu
Sumii, Junichi
Nekomoto, Akinori
subject
MRI
T2 high-signal line
osteochondral lesion
talus
stability
abstract
Background:
Magnetic resonance imaging (MRI) is useful for evaluating the stability of an osteochondral lesion of the talus (OLT). A T2 high-signal line between the fragment and its bed on MRI is known as a reliable indicator of an unstable lesion. However, the lesion exhibits various conditions even if a T2 high-signal line is observed. The purpose of this study was to evaluate the relationship between the T2 value of a high-signal line and the condition of the area between the fragment and its bed in OLT.

Methods:
T2 values of the T2 high-signal line and those of joint fluid were measured from preoperative MRI images in 46 ankles with OLT and the T2 ratio (high-signal line / joint fluid) was calculated. The relationship between the T2 ratio and CT, arthroscopic, and histologic findings was examined.

Results:
The mean T2 ratio was 0.48. T2 ratios of cystic lesions (0.62) or bone absorption (0.67) in the bed were significantly higher than those without a cyst (0.40) or no absorption (0.40). The T2 ratio of an unstable lesion (0.51) was significantly lower than that of a stable lesion (0.29). In histologic findings, there were 2 separate patterns: chondral and subchondral bone separations. The T2 ratio of the chondral separation (0.60) was significantly higher than that of bone separation (0.48).

Conclusion:
This study showed that the T2 ratio on a high-signal line was a predictor of stability, cyst, and bone absorption in OLT.

Level of evidence:
Level III, comparative series.
description
アクセプト後にタイトル・アブストラクト等変更あり、著者最終稿は変更前のタイトル"T2 value of high signal line on MRI is related to the conditions around the fragment in osteochondral lesion of talus"
journal title
Foot and Ankle International
volume
Volume 41
issue
Issue 6
start page
698
end page
704
date of issued
2020-06-01
publisher
SAGE Publications
issn
1071-1007
1944-7876
publisher doi
pubmed id
language
eng
nii type
Journal Article
HU type
Journal Articles
DCMI type
text
format
application/pdf
text version
author
rights
Nakasa T, Ikuta Y, Ota Y, et al. Relationship of T2 Value of High-signal Line on MRI to the Fragment in Osteochondral Lesion of the Talus. Foot & Ankle International. 41(6), pp.698-704. Copyright © 2020 Authors. doi:10.1177/1071100720910381
This is not the published version. Please cite only the published version. この論文は出版社版ではありません。引用の際には出版社版をご確認、ご利用ください。
relation url
department
University Medical Hospital
Graduate School of Biomedical & Health Sciences