Targeted radiofrequency field mapping using 3D reduced field-of-view-catalyzed double-angle method
نویسندگان
چکیده
منابع مشابه
3D Submillimeter-Resolution Reduced-Field-of-View Diffusion Tensor Imaging
Introduction For better delineation of neuronal architecture, higher spatial resolution is always desirable. Challenges in realization of high spatial resolution include but are not limited to long total scan time, low signal-to-noise ratio (SNR), and high sensitivity to T2* blurring, off-resonance, and motion-related artifacts. In the present work, the reduced field-of-view (rFOV) imaging appr...
متن کاملReduced field-of-view excitation using second-order gradients and spatial-spectral radiofrequency pulses.
The performance of multidimensional spatially selective radiofrequency (RF) pulses is often limited by their long duration. In this article, high-order, nonlinear gradients are exploited to reduce multidimensional RF pulse length. Specifically, by leveraging the multidimensional spatial dependence of second-order gradients, a two-dimensional spatial-spectral RF pulse is designed to achieve thre...
متن کاملReduced circular field-of-view imaging.
A rapid dynamic imaging technique based on polar k-space sampling is presented. A gain in temporal resolution is achieved by angular undersampling. A detailed analysis of the point spread function of angular undersampled polar imaging reveals a reduced diameter of the corresponding circular field of view. Under the assumption that dynamic changes are restricted to a local circular field of view...
متن کاملOptimized Sensitivity for 3D Mapping of the B1 Field using a Phase-Based Method
Introduction: The advent of surface array coils specially design for parallel imaging makes it necessary to develop rapid methods for B1 mapping, as the performance of the coil varies a lot within the sensitive volume and with different patient loadings. In this work we follow and modify a strategy previously presented [1, 2] both for proton and He MRI. Furthermore, the recent He price raise an...
متن کاملReduced field-of-view stack-of-spirals enables high spatiotemporal resolution 3D perfusion imaging
Background First-pass contrast-enhanced myocardial perfusion CMR is a useful non-invasive technique for evaluating coronary artery disease. 3D perfusion imaging provides images at the same cardiac phase which may be advantageous for quantifying ischemic burden, but current techniques have limited spatiotemporal resolution. We previously presented a 3D stack-of-spiral (SoS) perfusion method, how...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Magnetic Resonance Imaging
سال: 2011
ISSN: 0730-725X
DOI: 10.1016/j.mri.2011.05.006