نتایج جستجو برای: shimming
تعداد نتایج: 517 فیلتر نتایج به سال:
(RE)-Ba-Cu-O ring bulks, used as trapped field magnets, show great promise a compact and lightweight source for generating the magnetic fields required nuclear resonance (NMR). The inhomogeneities introduced by growth process of such bulks pose challenge to uniformity NMR. In this study, we model stack with varying <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w...
Figure 3. Plot of nav. distribution vs. position Solid line: median, dashed lines: nav. window. Metabolite-Cycled, ECG-Triggered and Navigator-Gated H MRS With Optimised Image-Based B0 Shimming Achieves High Spectral Quality In the Myocardium at 3T Donnie Cameron, Ariane Fillmer, Andreas Hock, Thomas W. Redpath, Michael P. Frenneaux, Dana Dawson, and Anke Henning The University of Aberdeen, Abe...
In collaboration with one of its user groups, the SRC has installed a new planar electromagnetic undulator (EMU) on the Aladdin storage ring. Field quality, and resulting radiation-performance of the device, are sufficiently close to the ideal that no shimming was required. With slight exception, only minor, anticipated adaptation onto the Aladdin ring was needed to meet strict operational requ...
Background We have been developing an automatic planning assist system for coach adjustment, local shimming scan plan, axial multi slice scan plan for slice-alignment, and whole-heart MR imaging plan (motion probes and an axial slab of main scan) [1,2]. However, the previous reposts of the system evaluated only Japanese patient’s and healthy volunteer’s datasets. The purpose of this study is to...
Introduction: The concept of B1-shimming is important for improving SNR and uniformity in MRI at high field. B1-shimming can be performed using multiple transmitters [1,2] connected to a coil array. A homogeneous slice can be achieved by adjusting the magnitude and phase on each transmitter channel until a uniform composite excitation is obtained. In this paper a high resolution vector modulato...
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