Measuring 3D knee dynamics using center out radial ultra-short echo time trajectories with a low cost experimental setup
نویسندگان
چکیده
Measuring 3D knee dynamics using center out radial ultra-short echo time trajectories with a low cost experimental setup Martin Krämer, Karl-Heinz Herrmann, Heide Boeth, Christoph von Tycowicz, Christian König, Stefan Zachow, Rainald M Ehrig, Hans-Christian Hege, Georg N Duda, and Jürgen R Reichenbach Medical Physics Group, Institute of Diagnostic and Interventional Radiology, Jena University Hospital Friedrich Schiller University Jena, Jena, Germany, Julius Wolff Institute and Center for Musculoskeletal Surgery, Charité – Universitätsmedizin Berlin, Berlin, Germany, Zuse Institute Berlin, Berlin, Germany
منابع مشابه
Fast 3D UTE Imaging of Knee Connective Tissues on a Clinical 3T Scanner
INTRODUCTION Connective tissues in human knee joint, such as articular cartilage, menisci, or ligaments, have short transverse relaxation time components (T2 ~5ms) due to their collagen-rich micro-structures (1). To image those short-T2 components with minimum signal loss, special pulse sequences capable of ultra-short echo time (UTE) are desired. A number of UTE sequences have been developed i...
متن کاملComparison of Three-Dimensional Double-Echo Steady-State Sequence with Routine Two-Dimensional Sequence in the Depiction of Knee Cartilage
Introduction: There are some routine two-dimensional sequences, including short tau inversion recovery (STIR), T2-weighted fast-spin echo (T2W-FSE), and proton-density fast spin-echo for diagnosing osteoarthritis and lesions of the knee cartilage. However, these sequences have some disadvantages, such as long scan time, inadequate spatial resolution, and suboptimal tis...
متن کاملRapid 3D-Sodium MRI of Knee Joint In-vivo at 7T
Introduction Loss of glycosaminoglycans (GAG) is a signature of early osteoarthritis (OA). Although sodium MRI has been shown to correlate linearly with GAG concentration (1, 2), it poses major challenges at clinical magnetic field strengths (1.5T/3.0T) in terms of low signal-to-noise (SNR), poor spatial resolution and long acquisition times due to low natural abundance, low sodium concentratio...
متن کاملA modified EPI sequence for high-resolution imaging at ultra-short echo time.
A robust modification of echo-planar imaging dubbed double-shot echo-planar imaging with center-out trajectories and intrinsic navigation (DEPICTING) is proposed, which permits imaging at ultra-short echo time. The k-space data is sampled by two center-out trajectories with a minimal delay achieving a temporal efficiency similar to conventional single-shot echo-planar imaging. Intersegment phas...
متن کاملThe shifted radial reordering for intermediate TE imaging in 3D long echo train acquisition
Introduction Use of nonselective pulses and modulated flip angles (aka SPACE, [2, 3, 4]) in refocusing pulses improves the sampling efficiency in 3D turbo spin echo imaging. Two flexible reordering schemes, the linear mode and the radial mode, have been proposed [1] to circumvent some intrinsic limitations of the rectangular kspace sampling grid (e.g., allowing for flexible k-space coverage) in...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2014