Effects of ACL interference screws on articular cartilage volume and thickness measurements with 1.5 T and 3 T MRI.
作者： M.E. Bowers , G.A. Tung , N. Trinh , E. Leventhal , J.J. Crisco
DOI: 10.1016/J.JOCA.2007.09.010
关键词: Cartilage 、 Cadaver 、 Biomedical engineering 、 Tibia 、 Anterior cruciate ligament 、 Anatomy 、 Femur 、 Ligament 、 Magnetic resonance imaging 、 Osteoarthritis 、 Materials science
摘要: Summary Objective To assess the effects of interference screws, which are commonly used to surgically fix an anterior cruciate ligament (ACL) graft in ACL-deficient knee, and magnetic field strength on cartilage volume thickness measurements with quantitative resonance imaging (qMRI). Methods Five cadaver knees were imaged using a cartilage-sensitive sequence (T1-weighted water-excitation, three-dimensional (3D) fast low-angle shot) 1.5T 3T scanners without screws implanted. The tibiofemoral articular was segmented reconstructed from images, made resulting 3D models. Results Although several load-bearing regions showed significant differences between magnet strengths, most no difference screw conditions. medial tibial mean decrease 5.9% 8.0% presence at 1.5T, respectively. At 7.0% 12.0%, respectively, screws. Conclusions Caution should be when interpreting particularly compartment. Additionally, qMRI not interchangeably structural changes during longitudinal studies.
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