Quantitative susceptibility mapping detects abnormalities in cartilage canals in a goat model of preclinical osteochondritis dissecans

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17 Scopus citations

Abstract

Purpose: To use quantitative susceptibility mapping (QSM) to investigate changes in cartilage canals in the distal femur of juvenile goats after their surgical transection. Methods: Chondronecrosis was surgically induced in the right medial femoral condyles of four 4-day-old goats. Both the operated and control knees were harvested at 2, 3, 5, and 10 weeks after the surgeries. Ex vivo MRI scans were conducted at 9.4 Tesla using TRAFF (relaxation time along a fictitious field)-weighted fast spin echo imaging and QSM to detect areas of chondronecrosis and investigate cartilage canal abnormalities. Histological sections from these same areas stained with hematoxylin and eosin and safranin O were evaluated to assess the affected tissues. Results: Both the histological sections and the TRAFF-weighted images of the femoral condyles demonstrated focal areas of chondronecrosis, evidenced by pyknotic chondrocyte nuclei, loss of matrix staining, and altered MR image contrast. At increasing time points after surgery, progressive changes and eventual disappearance of abnormal cartilage canals were observed in areas of chondronecrosis by using QSM. Conclusion: Abnormal cartilage canals were directly visualized in areas of surgically induced chondronecrosis. Quantitative susceptibility mapping enabled investigation of the vascular changes accompanying chondronecrosis in juvenile goats. Magn Reson Med 77:1276–1283, 2017.

Original languageEnglish (US)
Pages (from-to)1276-1283
Number of pages8
JournalMagnetic resonance in medicine
Volume77
Issue number3
DOIs
StatePublished - Mar 1 2017

Bibliographical note

Publisher Copyright:
© 2016 International Society for Magnetic Resonance in Medicine

Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.

Keywords

  • OCD
  • QSM
  • cartilage canals
  • chondronecrosis
  • epiphyseal cartilage
  • high-field MRI
  • osteochondritis dissecans
  • osteochondrosis
  • quantitative susceptibility mapping
  • vascular canal abnormality

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