Cohen-Adad, Julien Wald, Lawrence L.
Published in
Quantitative MRI of the Spinal Cord
Radiofrequency receive-only coil arrays consist of a spatial arrangement of several small surface coil elements that record the magnetic resonance signal independently. This provides two major benefits: first, the sensitivity local to an individual element is increased due to the close coupling between the detector and tissue, thereby increasing th...
Xu, Lin Feng, Yanqiu Liu, Xiaoyun Kang, Lili Chen, Wufan
Published in
Magnetic resonance imaging
Accuracy of interpolation coefficients fitting to the auto-calibrating signal data is crucial for k-space-based parallel reconstruction. Both conventional generalized autocalibrating partially parallel acquisitions (GRAPPA) reconstruction that utilizes linear interpolation function and nonlinear GRAPPA (NLGRAPPA) reconstruction with polynomial kern...
Published in
Introduction to Diffusion Tensor Imaging
Herédia, V Dale, B Op de Campos, R Ramalho, M Burke, L B Sams, C de Toni, M Semelka, R C
Published in
Radiologia
To investigate whether increasing temporal resolution with higher parallel imaging (PI) reduction factors (RF) in both breath-hold and free breathing approaches, using a non-contrast T1-weighted 3D gradient echo (GRE) sequence and a 32-channel phased array coil, permits diagnostic image quality, with potential application in patients unable to coop...
Jiang, Lei Zhou, Yiming Zhou, Cheng Chen, Min Dai, Yongming Fu, Yuan Zhao, Xuna
Published in
Magnetic Resonance Imaging
PurposeTo investigate the influence of dual-source parallel radiofrequency (RF) excitation on clinical breast MR images. MethodsA 3T MR system with both dual-source and conventional single-source RF excitations was used to examine 22 patients. Axial TSE-T2WI with fat suppression, TSE-T1WI without fat suppression, THRIVE (3D field echo) and DWI (SE-...
Son, H.W. Cho, Y.K. Gopinath, A. Vaughan, J.T. Lee, Chang Hyeong Yoo, H.
In high-field magnetic resonance imaging systems, parallel excitation with a multi-channel transmitter and receiver has been widely investigated to mitigate inhomogeneity. Multi-channel RF coils employed in the parallel imaging may alleviate the non-uniformity in the field and each element can be independently controlled by adjusting the phase and ...
Badillo, Solveig Vincent, Thomas Ciuciu, Philippe
Inter-subject fMRI analyses have specific issues regarding the reliability of the results concerning both the detection of brain activation patterns and the estimation of the underlying dynamics. Among these issues lies the variability of the hemodynamic response function (HRF), that is usually accounted for using functional basis sets in the gener...
Li, Mingyan Zuo, Zhentao Jin, Jin Xue, Rong Trakic, Adnan Weber, Ewald Liu, Feng Crozier, Stuart
Published in
Journal of Magnetic Resonance
Parallel imaging (PI) is widely used for imaging acceleration by means of coil spatial sensitivities associated with phased array coils (PACs). By employing a time-division multiplexing technique, a single-channel rotating radiofrequency coil (RRFC) provides an alternative method to reduce scan time. Strategically combining these two concepts could...
Winter, Lukas Kellman, Peter Renz, Wolfgang Gräßl, Andreas Hezel, Fabian Thalhammer, Christof von Knobelsdorff-Brenkenhoff, Florian Tkachenko, Valeriy Schulz-Menger, Jeanette Niendorf, Thoralf
...
Published in
European Radiology
ObjectivesTo implement, examine, and compare three multichannel transmit/receive coil configurations for cardiovascular MR (CMR) at 7T.MethodsThree radiofrequency transmit-receive (TX/RX) coils with 4-, 8-, and 16-coil elements were used. Ten healthy volunteers (seven males, age 28 ± 4 years) underwent CMR at 7T. For all three RX/TX coils, 2D CINE ...
El Mrini, Sanaa Hamri, Mohammed
Published in
Sensing and Imaging: An International Journal
This work aims to validate the performance of spin echo and parallel acquisition using “SENSitivity Encoding (SENSE)” by comparing it to different imaging techniques, including gradient echo-planar imaging using parallel acquisition and SENSE usually used and gradient echo sequences and that of the echo of echo-planar spin. It compares the performa...
