Abstract #0309
MRI relaxometry to assess the tension state of the anterior cruciate ligament in vivo
Delphine Perie 1,2 , Simon-Pierre Cot 1,2 , Guillaume Gilbert 3 , Maxime Raison 1,2 , and Guy Grimard 2
1
Mechanical Engineering, Ecole Polytechnique
de Montral, Montreal, QC, Canada,
2
Research
Center, CHU Sainte Justine, Montreal, QC, Canada,
3
Philips
Health Care, Montreal, QC, Canada
While the diagnosis and treatment of a ruptured ACL have
been under heavy study for the last decades, the
postoperative evaluation is still performed using
qualitative methods. Eight healthy volunteers had their
left knee imaged using multi-parametric MRI in two
positions: in full extension with the ACL under heavy
tension, and at 20 degrees of flexion with the ACL
nearly at rest. There were significant differences
between knee positions for T1rho and T2*, and between
subjects for T1rho only. To our knowledge, this study
represents the first attempt to assess directly in vivo
the tension state of the ACL. T1rho seems to be a good
indicator of the tension state within the ACL.
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