RESUMEN
Although MRI of the ankle has become a routine diagnostic method to cope with pathologic conditions of the ankle, the literature on postoperative evaluation of the ankle by imaging is very scarce. In this short course, the basic principles on surgical reconstruction techniques of ankle ligaments and tendons will be reviewed. The value of imaging--with emphasis on MRI--in depicting postoperative complications will be discussed as well.
Asunto(s)
Traumatismos del Tobillo/diagnóstico , Articulación del Tobillo/patología , Pie/patología , Imagen por Resonancia Magnética , Complicaciones Posoperatorias/diagnóstico , Traumatismos de los Tendones/diagnóstico , HumanosRESUMEN
PURPOSE: The aim of this work was to compare the knee coil and the surface coil for the visualisation of the patellar cartilage. MATERIALS AND METHODS: In 28 patients (17 women, 11 men) with an average age of 40 years (range 14-76) with knee pain MR was performed. Transverse images were obtained using a fast spin echo proton density weighted sequence on a Philips Gyroscan Intera 1.5 T clinical system. Transverse images were obtained at the level of the patellar cartilage using both the surface and the knee coil. All images were evaluated by consensus of two radiologists. They evaluated a number of quality criteria on a 4-point scale. Criteria for artefacts were also graded on a 4-point scale. RESULTS: For the visualisation of fluid there was no significant difference between the knee coil and the surface coil (P=0.021). For all other criteria regarding image quality and presence of imaging artefacts there was a significant difference between both coils (P<0.001) with the surface coil obtaining the better result. CONCLUSION: The use of the surface coil in the visualisation of the patellar cartilage can be recommended at knee MR.
Asunto(s)
Cartílago Articular/diagnóstico por imagen , Articulación de la Rodilla/diagnóstico por imagen , Imagen por Resonancia Magnética , Ligamento Rotuliano/diagnóstico por imagen , Adolescente , Adulto , Anciano , Artralgia/diagnóstico , Cartílago Articular/patología , Femenino , Humanos , Articulación de la Rodilla/patología , Masculino , Persona de Mediana Edad , Ligamento Rotuliano/patología , Intensificación de Imagen Radiográfica , Estadísticas no ParamétricasRESUMEN
In this article we study the ligaments and tendons of the posterolateral corner of the knee by anatomic dissection, MR-anatomic correlation, and MR imaging. The posterolateral aspect of two fresh cadaveric knee specimens was dissected. The MR-anatomic correlation was performed in three other specimens. The MR images of 122 patients were reviewed and assessed for the visualization of different posterolateral structures. Anatomic dissection and MR-anatomic correlation demonstrated the lateral collateral, fabellofibular, and arcuate ligaments, as well as the biceps and popliteus tendons. On MR images of patients the lateral collateral ligament was depicted in all cases. The fabellofibular, arcuate, and popliteofibular ligaments were visualized in 33, 25, and 38% of patients, respectively. Magnetic resonance imaging allows a detailed appreciation of the posterolateral corner of the knee.
Asunto(s)
Ligamentos Colaterales/anatomía & histología , Articulación de la Rodilla/anatomía & histología , Imagen por Resonancia Magnética , Anciano , Cadáver , HumanosRESUMEN
PURPOSE: To analyze the extension of medial and lateral meniscal cysts relative to the capuloligamentous planes of the knee. MATERIALS AND METHODS: The MR images of 32 patients with meniscal cysts were reviewed. The location and extension of the meniscal cysts with reference to the capsule and ligaments were recorded. RESULTS: Most medial meniscal cysts were located posteromedially. Posteromedial meniscal cysts usually penetrated the capsule and were located between layer I and the fused layers II+III. From this site some extended anteriorly and then became located superficial to the superficial MCL. The location of lateral meniscal cysts was more varied. Anteriorly the cysts were located deep to the iliotibial band, whereas posterolateral cysts were located deep to the lateral collateral ligament. CONCLUSION: Although the site of capsular penetration of meniscal cysts is determined by the location of meniscal tears, the possible pathways of extension appear to be determined by the capsuloligamentous planes of the knee.