The Role of Nonlinear Gradients in Parallel Imaging: A k-Space Based Analysis [0.03%]
非线性编码在并行成像中的作用：基于k-空间的分析
Gigi Galiana,Jason P Stockmann,Leo Tam et al.
Gigi Galiana et al.
Sequences that encode the spatial information of an object using nonlinear gradient fields are a new frontier in MRI, with potential to provide lower peripheral nerve stimulation, windowed fields of view, tailored spatially-varying resoluti...
Ali Gholipour,Judith A Estroff,Carol E Barnewolt et al.
Ali Gholipour et al.
Fetal magnetic resonance imaging (MRI) examinations have become well-established procedures at many institutions and can serve as useful adjuncts to ultrasound (US) exams when diagnostic doubts remain after US. Due to fetal motion, however,...
Mark Tseitlin,Sandra S Eaton,Gareth R Eaton
Mark Tseitlin
Electron paramagnetic resonance (EPR) experimental techniques produce absorption or first-derivative spectra. Uncertainty analysis provides the basis for comparison of spectra obtained by different methods. In this study it was used to deri...
Lung Parenchymal Signal Intensity in MRI: A Technical Review with Educational Aspirations Regarding Reversible Versus Irreversible Transverse Relaxation Effects in Common Pulse Sequences [0.03%]
磁共振中肺实质信号强度的技术综述——常见脉冲序列中可逆与不可逆横向弛豫效应的教育展望
Robert Mulkern,Steven Haker,Hatsuho Mamata et al.
Robert Mulkern et al.
Lung parenchyma is challenging to image with proton MRI. The large air space results in ~l/5th as many signal-generating protons compared to other organs. Air/tissue magnetic susceptibility differences lead to strong magnetic field gradient...
The Importance of k-Space Trajectory on Off-Resonance Artifact in Segmented Echo-Planar Imaging [0.03%]
k空间轨迹在分割EPI离共振伪影中的作用
Jacob A Bender,Rizwan Ahmad,Orlando P Simonetti
Jacob A Bender
Segmented interleaved echo planar imaging (EPI) is a highly efficient data acquisition technique; however, EPI is sensitive to artifacts from off-resonance spins. The choice of k-space trajectories is important in determining how off-resona...
Laplace Inversion of Low-Resolution NMR Relaxometry Data Using Sparse Representation Methods [0.03%]
基于稀疏表示的低分辨率NMR弛豫数据拉普拉斯反演方法
Paula Berman,Ofer Levi,Yisrael Parmet et al.
Paula Berman et al.
Low-resolution nuclear magnetic resonance (LR-NMR) relaxometry is a powerful tool that can be harnessed for characterizing constituents in complex materials. Conversion of the relaxation signal into a continuous distribution of relaxation c...
INTERCOMPARISON OF PERFORMANCE OF RF COIL GEOMETRIES FOR HIGH FIELD MOUSE CARDIAC MRI [0.03%]
高性能鼠心MRI线圈性能的对比研究
Christakis Constantinides,S Angeli,S Gkagkarellis et al.
Christakis Constantinides et al.
Multi-turn spiral surface coils are constructed in flat and cylindrical arrangements and used for high field (7.1 T) mouse cardiac MRI. Their electrical and imaging performances, based on experimental measurements, simulations, and MRI expe...
The Time-Domain Matched Filter and the Spectral-Domain Matched Filter in 1-Dimensional NMR Spectroscopy [0.03%]
一维核磁共振谱学中的时域匹配滤波与频域匹配滤波
Richard G Spencer
Richard G Spencer
A type of "matched filter" (MF), used extensively in the processing of one-dimensional spectra, is defined by multiplication of a free-induction decay (FID) by a decaying exponential with the same time constant as that of the FID. This maxi...
Mehdi Mobli,Jeffrey C Hoch
Mehdi Mobli
The time required to complete a multidimensional NMR experiment is directly proportional to the number of evolution times sampled in the indirect dimensions. A consequence when utilizing conventional methods of data acquisition and spectrum...
David P Goldenberg
David P Goldenberg
The product-operator formalism is the most commonly used tool for describing and designing multidimensional NMR experiments. In spite of its relative simplicity and sound theoretical underpinnings, however, students and practitioners often ...