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K F Kreitner, M Hansen, S Schadmand-Fischer, F Krummenauer, M Runkel
PURPOSE: To define the diagnostic accuracy of an open low-field MR unit (Magnetom Open, Siemens, Erlangen) in traumatic knee lesions. MATERIALS AND METHODS: The MRIs of 150 patients were prospectively evaluated by two independent readers with different experience levels. The study protocol included a proton-density weighted SE-sequence in the sagittal, a T2.-weighted Flash-2D-sequence in the coronal, and a 3D-acquisition (DESS) in the axial plane. 75 patients were treated either conservatively or operatively...
January 1999: RöFo: Fortschritte Auf Dem Gebiete der Röntgenstrahlen und der Nuklearmedizin
Jeffrey Otjen, Shawn E Parnell, Sarah Menashe, Mahesh M Thapa
In children, MR arthrography is typically performed using fluoroscopic guidance. This article explores the role of US-guided joint injections as an alternative for MR arthrography in children, discussing its advantages and disadvantages compared to standard methods. We describe techniques for performing US-guided injection of the shoulder, elbow, hip, knee, ankle and posterior subtalar joints, highlighting pertinent anatomy, routes of access and unique considerations for this modality in children. Written descriptions, images and links to video clips are used to illustrate proper arthrographic technique...
March 2015: Pediatric Radiology
Eva Llopis, Pau Montesinos, M Teresa Guedez, Luis Aguilella, Luis Cerezal
The use of MR for the diagnosis of shoulder lesions is well established, as well as MR arthrography for the diagnosis for shoulder instability and microinstability. For an accurate evaluation is essential to know the normal anatomy and variants to avoid the misdiagnosis of a pitfall as pathological condition. In addition we will discuss which variants might be clinically relevant. We will review the classical frequent variants such as intraarticular structures, especially glenohumeral ligaments and labrum but also bone, cartilage and rotator cuff variants and pitfalls...
July 2015: Seminars in Musculoskeletal Radiology
Michael E Cody, David T Nakamura, Kirstin M Small, Hiroshi Yoshioka
MR imaging has emerged as the mainstay in imaging internal derangement of the soft tissues of the musculoskeletal system largely because of superior contrast resolution. The complex geometry and diminutive size of the triangular fibrocartilage complex (TFCC) and its constituent structures can make optimal imaging of the TFCC challenging; therefore, production of clinically useful images requires careful optimization of image acquisition parameters. This article provides a foundation for advanced TFCC imaging including factors to optimize magnetic resonance images, arthrography, detailed anatomy, and classification of injury...
August 2015: Magnetic Resonance Imaging Clinics of North America
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