Knee Clinical Trial
Official title:
Exploration of Knee Injuries Using 3 Tesla and 7 Tesla Magnetic Resonance Imaging at the University Hospital of Poitiers.
The knee is the most stressed and exposed joint in sports practice (70 to 85% of Anterior Cruciate Ligament ruptures occur during sports activities). Although traumatic knee injuries are already described in radiology and 1.5 Tesla and 3 Tesla MRI, there are cases of post-traumatic knee pain with a normal MRI (with a risk of underestimating a traumatic injury that may worsen without appropriate treatment) and cases of "ambiguous" MRI findings (uncertainty between low or high-grade ligament or meniscal injury, presence or absence of meniscal attachments, complete versus partial rupture of the Anterior Cruciate Ligament, associated cartilage lesion versus intact cartilage), which directly impact orthopedic or surgical therapeutic management.
Knee pain (or gonalgia) is a very common complaint in the general population, accounting for nearly 6% of visits to general practitioners and experienced by approximately 46% of patients at least once in their lifetime (Jackson et al.). The knee is one of the largest and most complex joints in the body, comprising three different joints and a multitude of stabilizing and functional structures (ligaments, menisci, bursa, tendons, etc.). This complex functional anatomy partly explains the multiple etiologies of knee pain, especially post-traumatic. Among these etiologies, ligamentous (particularly anterior cruciate ligament), bony, and meniscal injuries are prominent (Webb et al.). The passive stability of the knee is ensured by a complex capsuloligamentary system. Two ligament systems are usually distinguished: the central pivot (cruciate ligaments) and the peripheral structures (anterior, anterolateral, collateral, and posterior). In the case of injuries to one or more elements of this system, knee instability can occur and be detrimental to functional prognosis. These injuries should be addressed promptly (Bressy et al.). Furthermore, these capsuloligamentary injuries are frequently associated with complex meniscal, bony, or musculotendinous lesions (Blin et al., Boutry et al.). With surgical techniques becoming increasingly precise and minimally invasive, surgeons need accurate preoperative localization of these lesions to plan their surgical approach and operative procedure (Fanelli - book). These injuries are better understood with 3 Tesla MRI, which is the imaging modality of choice, in addition to standard radiographs, for exploring traumatic knee injuries (Blin et al.). MRI, by visualizing contusion areas, helps understand the mechanism of trauma and predict and confirm capsuloligamentary injuries. However, in our clinical practice, we observe that a certain percentage of MRI examinations are considered unremarkable despite patients experiencing persistent post-traumatic pain or functional discomfort. This could be related to insufficient imaging resolution in relation to the millimetric nature of the explored lesions. Considering all this data, it has become pertinent for us to: - Seek to optimize the diagnostic quality of MRI imaging in these patients, as it directly affects orthopedic management. - Seek to improve existing MRI lesion classifications and develop new ones. - Develop new MRI tools (sequences) for exploring traumatic knee injuries. The expected results are: - Define the 7 Tesla MRI findings of traumatic knee injuries. - Assess the inter-observer variability between 3T and 7T for a future study on diagnostic power (preliminary data). ;
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