Toward Super-Resolution Reconstruction of Diffusion-Relaxation MRI Using Slice Excitation With Random Overlap (SERO) [0.03%]
基于随机重叠切层激励的扩散弛豫MRI超分辨率重建方法研究
Felix Mortensen,Jakub Jurek,Jens Sjölund et al.
Felix Mortensen et al.
Purpose: Diffusion MRI probes tissue microstructure, but low SNR and limited resolution hinder detection of features and parameter estimates. We introduce slice excitation with random overlap (SERO), which enables variabl...
Assessment of Lung Microvasculature Alterations in Pulmonary Fibrosis With Hyperpolarized Xenon Magnetic Resonance [0.03%]
超极氙磁共振评估肺纤维化中的肺微血管改变
Ming Zhang,Haidong Li,Hongchuang Li et al.
Ming Zhang et al.
Purpose: To evaluate the feasibility of measuring gas exchange between the alveolar-capillary membrane and red blood cells (RBCs) using hyperpolarized 129Xe magnetic resonance, and to assess its potential for detecting di...
Dynamic Contrast Enhanced-Magnetic Resonance Fingerprinting (DCE-MRF) Improves Detection of Induced Vascular Perfusion Reduction in a Mouse Breast Cancer Model [0.03%]
基于动态对比增强的磁共振指纹技术(DCE-MRF)可提高小鼠乳腺癌模型中诱导性血管灌注变化的检测性能
Christina J MacAskill,Bernadette O Erokwu,Yuran Zhu et al.
Christina J MacAskill et al.
Purpose: Dynamic contrast-enhanced MRI (DCE-MRI) can assess tumor perfusion using pharmacokinetic models. However, poor DCE-MRI reproducibility from reliance on conventional T1-weighted MRI has limited clinical translatio...
An Open-Source Software Toolbox for Rapid Radiofrequency Coil Design and Evaluation in MRI [0.03%]
磁共振成像中的射频线圈的快速设计与评估开源软件工具箱
Ilias I Giannakopoulos,Bei Zhang,José E Cruz Serrallés et al.
Ilias I Giannakopoulos et al.
Purpose: Image quality and resolution in MRI are fundamentally constrained by the performance of radiofrequency (RF) coils used to excite the spins and receive the signal. Electromagnetic (EM) simulations are essential fo...
On-Scanner Correction of Gradient Nonlinearity Bias for Accurate Assessment of Diffusion Heterogeneity Across Bone Sites in Myelofibrosis Patients [0.03%]
校正梯度非线性偏差以准确评估多发骨髓纤维化患者的骨弥散异质性
Dariya Malyarenko,Brian D Ross,Johannes M Peeters et al.
Dariya Malyarenko et al.
Purpose: To improve accuracy of apparent diffusion coefficient (ADC) measurement across different bone-marrow (BM) sites for myelofibrosis (MF) patients. ...
Next Generation 7 Tesla Arterial Spin Labeling With Rotated Spiral Acquisition Enables Mesoscale Resolution in 3D Brain Perfusion and Functional MRI [0.03%]
基于旋转螺旋采集的下一代7特斯拉动脉自旋标记可在三维脑灌注和功能MRI中实现介观分辨率
Chenyang Zhao,Fanhua Guo,Zidong Yang et al.
Chenyang Zhao et al.
Purpose: To achieve high resolution (≤ 1 mm isotropic) whole-brain perfusion imaging at 7 T with next generation ASL pulse sequence, reconstruction algorithm, and MRI hardware. ...
Modeling the Intermediate Flow Regime in Flow-Compensated Intravoxel Incoherent Motion MRI [0.03%]
流补偿的中间流动制在体素内不相干运动MRI中的建模问题研究
Louise Rosenqvist,Mikael Montelius,Isabella M Björkman-Burtscher et al.
Louise Rosenqvist et al.
Purpose: The intravoxel incoherent motion (IVIM) model is commonly used to separate the effects of motion related to diffusion and blood microcirculation (perfusion) on the MR signal. Depending on the encoding time (T), i...
Calibration-Free GRAPE pTx Pulses for Homogeneous Spatial-Selective Excitation at 7T [0.03%]
无校准GRAPE pTx脉冲在7T上实现均匀空间选择激发
Daniel Löwen,Eberhard D Pracht,Marten Veldmann et al.
Daniel Löwen et al.
Purpose: Extend the universal pulse GRAPE formalism to pulses with a defined spectral response, and apply the concept to spatial selection. Methods: ...
3D Phase Contrast Using Balanced Steady-State Free Precession (PC-SSFP) for Improved 4D Flow at Clinical Field Strengths [0.03%]
基于稳态自由进动的三维相位对比(PCI-SSFP)在临床磁场强度下改善四维流体流动成像性能的研究
Jie Xiang,Maolin Qiu,Gigi Galiana et al.
Jie Xiang et al.
Purpose: 4D flow MRI provides comprehensive evaluation of cardiovascular flow. One major limitation of intracardiac 4D flow is poor blood-myocardial contrast. 2D phase contrast using balanced steady state free precession ...
Echo-Planar-Based Time-of-Flight Imaging Using a Modified Interleaved Flyback Trajectory [0.03%]
基于回波平面的时间-of-飞行成像使用修改后的交错飞回轨迹
Simon Blömer,Tony Stöcker,Rüdiger Stirnberg
Simon Blömer
Purpose: A modified interleaved flyback (miFB) approach is introduced, designed to mitigate flow artifacts caused by alternating readout polarities in Echo Planar Imaging (EPI), while preserving acquisition efficiency. ...