![]() 5 proposed to assess cartilage contact pressure by modeling the kinematical model. There is currently substantial interest in these techniques from rheumatologists and orthopedists radiologists therefore need to keep up with these developments. For dynamically investigate the hip joint contact pressure, Assassi et al. These techniques aim at detecting cartilage damage at a stage when changes are potentially still reversible, before cartilage tissue is lost. of contact using established methods24, 25, implemented in PostView. The most exciting developments, however, are in the field of cartilage matrix assessment with quantitative dGEMRIC, T2 and T1rho mapping techniques. Labrum load support, and labrum and acetabular cartilage contact stress and contact. Volumetric quantitative cartilage MR imaging was developed as a tool to monitor the progression of osteoarthritis and to evaluate new pharmacological cartilage protective therapies. 36 Our current method derived the contact region from direct visualization. Using high-field MR imaging at 3.0-T, visualization of cartilage and the related pathology has been improved. A number of 3D cartilage models defined cartilage-to-cartilage contact points based on surface intersections, 11,16,35 but, these models did not consider the cartilage morphology changes under strain and weight bearing, which can alter the amount of cartilage contact. The delineation of surface changes is similar to 3-T MRI using cartilage-dedicated sequences. METHODS: MRI was performed on ten healthy volunteers using a 3-T MRI unit with a 3D dual-echo steady-state gradient-recalled echo sequence. In addition, new sequences that have been developed and are currently being investigated are presented, including driven equilibrium Fourier transform and steady-state free precession-based imaging. Phase-contrast imaging provides visualization of altered cartilage regions invisible in absorption CT with simultaneous high detail of the underlying bony abnormalities. This study aimed to assess the effects of axial leg traction during knee MRI examination on joint space widening and articular cartilage visualization and evaluate the ideal weight for traction. Peak and average contact stresses within the contact area on the cartilage were calculated for all subjects and loading scenarios. In this review article, standard MR imaging sequences are described, including proton density-weighted fast spin echo, spoiled gradient echo and dual echo steady state sequences. Contact area was calculated on the articulating surface of the acetabular cartilage as an absolute value and as a percentage of the total surface area. MRI is non-invasive and repetitive imaging study of an individual using MRI is possible without side effects. High resolution gradient echo MRI sequences with fat suppression are the most useful techniques for quantization of cartilage dimensions. MR imaging-based techniques to visualize cartilage are prerequisites to guide and monitor these therapies. MRI can visualize cartilage, bone and other surrounding soft tissues distinctly. Cartilage repair techniques and pharmacological therapies are currently areas of major clinical interest and research, in particular to prevent and treat osteoarthritis.
0 Comments
Leave a Reply. |