A Robust Method for Estimating B0 Inhomogeneity Field in the Liver by Mitigating Fat Signals and Phase-Wrapping
نویسندگان
چکیده
Corresponding Author: Yue Cao, PhD Departments of Radiation Oncology, Biomedical Engineering, and Radiology, University of Michigan, Ann Arbor, MI 48109, USA; E-mail: [email protected]
منابع مشابه
A method for macroscopic B0 field inhomogeneity compensated SWI using 3D z-shim multi-echo GRE
Purpose Susceptibility weighted imaging (SWI) based on GRE provides enhancement of susceptibility difference which is useful for visualization of vein, micro-hemorrhage and iron deposition. However, GRE suffers from the macroscopic B0 inhomogeneity due to air/tissue boundary and this effect is shown as SNR loss both in magnitude and phase. Previously, 3D z-shim multi-echo GRE (mGRE) pulse seque...
متن کاملFour dimensional spectral-spatial fat saturation pulse design.
PURPOSE The conventional spectrally selective fat saturation pulse may perform poorly with inhomogeneous amplitude of static (polarizing) field (B0 ) and/or amplitude of (excitation) radiofrequency field (B1 ) fields. We propose a four dimensional spectral-spatial fat saturation pulse that is more robust to B0/B1 inhomogeneity and also shorter than the conventional fat saturation pulse. THEOR...
متن کاملHierarchical IDEAL – robust water-fat separation at high field by multiresolution field map estimation
Introduction In recent years, IDEAL (iterative decomposition of water and fat with echo asymmetry and least-squares estimation) [1] has gained considerable popularity as a practical method for acquiring high-quality fat and water images. At the core of IDEAL is a field-map estimation process, which is needed to properly assign signal components to the water and fat images. IDEAL holds particula...
متن کاملEvaluation of Phase Locking and Cross Correlation Methods for Estimating the Time Lag between Brain Sites: A Simulation Approach
Introduction: Direction and latency of electrical connectivity between different sites of brain explains brain neural functionality. We compared efficiency of cross correlation and phase locking methods in time lag estimation which are based on local field potential (LFP) and LFPspike signals, respectively. Methods: Signals recorded from MT area of a macaque’s brain was used in a simulation ...
متن کاملUse of a Two-point Dixon Vibe Sequence for Post-contrast Liver Mri: Comparison with Standard Chemically-selective Fat-suppressed Vibe for Image Quality and Lesion Detection
Introduction: Dynamic gadolinium-enhanced T1-weighted images are a critical component of clinical liver MRI examinations for focal lesion detection and characterization. This is typically performed as a 3D acquisition using chemically-selective fat-saturation, as demonstrated by the volumetric interpolated breath-hold examination (VIBE) sequence. A limitation of this approach is that chemically...
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 2017