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Correlation of laminated MR appearance of articular cartilage with histology, ascertained by artificial landmarks on the cartilage
Author(s) -
Kim Dong Joon,
Suh JinSuck,
Jeong EunKee,
Shin KyooHo,
Yang Woo Ick
Publication year - 1999
Publication title -
journal of magnetic resonance imaging
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.563
H-Index - 160
eISSN - 1522-2586
pISSN - 1053-1807
DOI - 10.1002/(sici)1522-2586(199907)10:1<57::aid-jmri8>3.0.co;2-4
Subject(s) - articular cartilage , magnetic resonance imaging , cartilage , gradient echo , nuclear magnetic resonance , spin echo , materials science , magic angle , anatomy , biomedical engineering , physics , medicine , radiology , pathology , osteoarthritis , nuclear magnetic resonance spectroscopy , alternative medicine
The object of this study was to correlate the laminae of articular cartilage on magnetic resonance (MR) imaging with histologic layers. T1‐ and fast spin‐echo T2‐weighted images of articular cartilage with artificial landmarks were obtained under high gradient echo strength (25 mT/m) conditions and a voxel size of 78 × 156 × 2000 μm. Images were also obtained with a) changed frequency‐encoding directions; b) changed readout gradient strength; and c) a varied number of phase‐encoding steps. T2 mapping was performed with angular variations. Artificial landmarks allowed accurate comparison between the laminae on MR images and the histologic zones. No alterations of the laminae were noted by changing the frequency gradient direction. Altering readout gradient strengths did not show a difference in the thickness of the laminae, and increasing the phase‐encoding steps resulted in a more distinct laminated appearance, ruling out chemical shift, susceptibility, and truncation artifacts. The T2 mapping profile showed an anisotropic angular dependency from the magic angle effect. In conclusion, the laminated appearance of articular cartilage on spin‐echo and fast spin‐echo MR images correlated with the histologic zones rather than MR artifacts.J. Magn. Reson. Imaging 1999;10:57–64. © 1999 Wiley‐Liss, Inc.