Fast acceleration of ASL-based time-resolved magnetic resonance angiography by acquisition of control and labeled images in the same shot (fast ACTRESS): An optimization study
To establish an optimized sequence design for fast acceleration of arterial spin labeling (ASL)-based time-resolved magnetic resonance angiography (MRA) by acquisition of control and labeled images in the same shot (fast ACTRESS) and a scan time of (Source: Magnetic Resonance Imaging)
Source: Magnetic Resonance Imaging - July 25, 2017 Category: Radiology Authors: Hiroyuki Sugimori, Noriyuki Fujima, Yuriko Suzuki, Hiroyuki Hamaguchi, Kinya Ishizaka, Kohsuke Kudo Tags: Technical note Source Type: research
R1 ρ dispersion and sodium imaging in human calf muscle
To evaluate the magnitude of chemical exchange effects and R1 ρ dispersion in muscle and their relationship to tissue sodium levels with aging. (Source: Magnetic Resonance Imaging)
Source: Magnetic Resonance Imaging - July 24, 2017 Category: Radiology Authors: Ping Wang, He Zhu, Hakmook Kang, John C. Gore Tags: Original contribution Source Type: research
Rapid acquisition of magnetic resonance imaging of the shoulder using three-dimensional fast spin echo sequence with compressed sensing
To evaluate the feasibility of 3D fast spin-echo (FSE) imaging with compressed sensing (CS) for the assessment of shoulder. (Source: Magnetic Resonance Imaging)
Source: Magnetic Resonance Imaging - July 24, 2017 Category: Radiology Authors: Seung Hyun Lee, Young Han Lee, Ho-Taek Song, Jin-Suck Suh Source Type: research
Simple algorithm for the correction of MRI image artefacts due to random phase fluctuations
Fast Field-Cycling (FFC) MRI is a novel technology that allows varying the main magnetic field B0 during the pulse sequence, from the nominal field (usually hundreds of millitesla) down to Earth's field or below. This technique uses resistive magnets powered by fast amplifiers. One of the challenges with this method is to stabilise the magnetic field during the acquisition of the NMR signal. Indeed, a typical consequence of field instability is small, random phase variations between each line of k-space resulting in artefacts, similar to those which occur due to homogeneous motion but harder to correct as no assumption can...
Source: Magnetic Resonance Imaging - July 24, 2017 Category: Radiology Authors: Lionel M. Broche, P. James Ross, Gareth R. Davies, David J. Lurie Tags: Original contribution Source Type: research
Rat brain digital stereotaxic white matter atlas with fine tract delineation in Paxinos space and its automated applications in DTI data analysis
To automatically analyze diffusion tensor images of the rat brain via both voxel-based and ROI-based approaches, we constructed a new white matter atlas of the rat brain with fine tracts delineation in the Paxinos and Watson space. (Source: Magnetic Resonance Imaging)
Source: Magnetic Resonance Imaging - July 21, 2017 Category: Radiology Authors: Shengxiang Liang, Shang Wu, Qi Huang, Shaofeng Duan, Hua Liu, Yuxiao Li, Shujun Zhao, Binbin Nie, Baoci Shan Tags: Technical note Source Type: research
Large improvement of RF transmission efficiency and reception sensitivity for human in vivo 31P MRS imaging using ultrahigh dielectric constant materials at 7T
In vivo 31P MRS provides a unique and important imaging tool for studying high-energy phosphate metabolism and bioenergetics noninvasively. However, compared to 1H MRS, 31P MRS with a relatively low gyromagnetic ratio ( γ) has a lower and limited sensitivity even at ultrahigh field. The proof of concept has been recently demonstrated that the use of high dielectric constant (HDC) materials between RF coil and object sample could increase MRI signal and reduce required RF transmission power for reaching the same RF pulse flip angle in the region of interest. (Source: Magnetic Resonance Imaging)
Source: Magnetic Resonance Imaging - July 21, 2017 Category: Radiology Authors: Byeong-Yeul Lee, Xiao-Hong Zhu, Sebastian Rupprecht, Michael T. Lanagan, Qing X. Yang, Wei Chen Source Type: research
Assessment of MRI issues for a new cerebral spinal fluid shunt, gravitational valve (GV)
The objective of this investigation was to evaluate MRI-related issues (i.e., magnetic field interactions, heating, and artifacts) for a newly developed, metallic GV. (Source: Magnetic Resonance Imaging)
Source: Magnetic Resonance Imaging - July 20, 2017 Category: Radiology Authors: Daniel Moghtader, Hans-Joachim Crawack, Christoph Miethke, Zinah D örlemann, Frank G. Shellock Tags: Original contribution Source Type: research
Fast carotid artery MR angiography with compressed sensing based three-dimensional time-of-flight sequence
In this study, we sought to investigate the feasibility of fast carotid artery MR angiography (MRA) by combining three-dimensional time-of-flight (3D TOF) with compressed sensing method (CS-3D TOF). (Source: Magnetic Resonance Imaging)
Source: Magnetic Resonance Imaging - July 19, 2017 Category: Radiology Authors: Bo Li, Hao Li, Li Dong, Guofu Huang Source Type: research
Sparse MRI reconstruction using multi-contrast image guided graph representation
Accelerating the imaging speed without sacrificing image structures plays an important role in magnetic resonance imaging. Under-sampling the k-space data and reconstructing the image with sparsity constraint is one efficient way to reduce the data acquisition time. However, achieving high acceleration factor is challenging since image structures may be lost or blurred when the acquired information is not sufficient. Therefore, incorporating extra knowledge to improve image reconstruction is expected for highly accelerated imaging. (Source: Magnetic Resonance Imaging)
Source: Magnetic Resonance Imaging - July 19, 2017 Category: Radiology Authors: Zongying Lai, Xiaobo Qu, Hengfa Lu, Xi Peng, Di Guo, Yu Yang, Gang Guo, Zhong Chen Tags: Original contribution Source Type: research
Fast carotid artery MR angiography with compressed sensing based three-dimensional time-of-fight sequence
In this study, we sought to investigate the feasibility of fast carotid artery MR angiography (MRA) by combining three-dimensional time-of-flight (3D TOF) with compressed sensing method (CS-3D TOF). (Source: Magnetic Resonance Imaging)
Source: Magnetic Resonance Imaging - July 19, 2017 Category: Radiology Authors: Bo Li, Hao Li, Li Dong, Guofu Huang Source Type: research
Predicting the nodal status in gastric cancers: The role of apparent diffusion coefficient histogram characteristic analysis
To explore the application of histogram analysis in preoperative T and N staging of gastric cancers, with a focus on characteristic parameters of apparent diffusion coefficient (ADC) maps. (Source: Magnetic Resonance Imaging)
Source: Magnetic Resonance Imaging - July 19, 2017 Category: Radiology Authors: Song Liu, Yujuan Zhang, Jie Xia, Ling Chen, Wenxian Guan, Yue Guan, Yun Ge, Jian He, Zhengyang Zhou Tags: Oral contribution Source Type: research
Learning-based structurally-guided construction of resting-state functional correlation tensors
Functional magnetic resonance imaging (fMRI) measures changes in blood-oxygenation-level-dependent (BOLD) signals to detect brain activities. It has been recently reported that the spatial correlation patterns of resting-state BOLD signals in the white matter (WM) also give WM information often measured by diffusion tensor imaging (DTI). These correlation patterns can be captured using functional correlation tensor (FCT), which is analogous to the diffusion tensor (DT) obtained from DTI. In this paper, we propose a noise-robust FCT method aiming at further improving its quality, and making it eligible for further neuroscie...
Source: Magnetic Resonance Imaging - July 17, 2017 Category: Radiology Authors: Lichi Zhang, Han Zhang, Xiaobo Chen, Qian Wang, Pew-Thian Yap, Dinggang Shen Tags: Original contribution Source Type: research
AIR-MRF: Accelerated iterative reconstruction for magnetic resonance fingerprinting
Existing approaches for reconstruction of multiparametric maps with magnetic resonance fingerprinting (MRF) are currently limited by their estimation accuracy and reconstruction time. We aimed to address these issues with a novel combination of iterative reconstruction, fingerprint compression, additional regularization, and accelerated dictionary search methods. The pipeline described here, accelerated iterative reconstruction for magnetic resonance fingerprinting (AIR-MRF), was evaluated with simulations as well as phantom and in vivo scans. (Source: Magnetic Resonance Imaging)
Source: Magnetic Resonance Imaging - July 14, 2017 Category: Radiology Authors: Christopher C. Cline, Xiao Chen, Boris Mailhe, Qiu Wang, Josef Pfeuffer, Mathias Nittka, Mark A. Griswold, Peter Speier, Mariappan S. Nadar Source Type: research
Three-dimensional adiabatic inversion recovery prepared ultrashort echo time cones (3D IR-UTE-Cones) imaging of cortical bone in the hip
We present three-dimensional adiabatic inversion recovery prepared ultrashort echo time Cones (3D IR-UTE-Cones) imaging of cortical bone in the hip of healthy volunteers using a clinical 3T scanner. (Source: Magnetic Resonance Imaging)
Source: Magnetic Resonance Imaging - July 14, 2017 Category: Radiology Authors: Amin Nazaran, Michael Carl, Yajun Ma, Saeed Jerban, Yanchun Zhu, Xing Lu, Jiang Du, Eric Y. Chang Tags: Technical note Source Type: research
MRI magic-angle effect in femorotibial cartilages of the red kangaroo
This study aimed to develop a detailed understanding of the collagen architecture in kangaroo knee cartilages and thus obtain insights into the biophysical basis of their function. (Source: Magnetic Resonance Imaging)
Source: Magnetic Resonance Imaging - July 14, 2017 Category: Radiology Authors: Tonima S. Ali, Namal Thibbotuwawa, YuanTong Gu, Konstantin I. Momot Tags: Original contribution Source Type: research
