Hu, Jisu Li, Ming Dai, Yakang Geng, Chen Tong, Baotong Zhou, Zhiyong Liang, Xue Yang, Wen Zhang, Bing
Published in
BioMedical Engineering OnLine
BackgroundIn diffusion-weighted magnetic resonance imaging (DWI) using single-shot echo planar imaging (ss-EPI), both reduced field-of-view (FOV) excitation and sensitivity encoding (SENSE) alone can increase in-plane resolution to some degree. However, when the two techniques are combined to further increase resolution without pronounced geometric...
Gordon, Jeremy W Hansen, Rie B Shin, Peter J Feng, Yesu Vigneron, Daniel B Larson, Peder E Z
Published in
Journal of magnetic resonance (San Diego, Calif. : 1997)
With the translation of metabolic MRI with hyperpolarized 13C agents into the clinic, imaging approaches will require large volumetric FOVs to support clinical applications. Parallel imaging techniques will be crucial to increasing volumetric scan coverage while minimizing RF requirements and temporal resolution. Calibrationless parallel imaging ap...
Zhao, Ningning O'Connor, Daniel Gu, Wenbo Ruan, Dan Basarab, Adrian Sheng, Ke
This paper addresses the problem of dynamic magnetic resonance image (DMRI) reconstruction and motion estimation jointly. Because of the inherent anatomical movements in DMRI acquisition, reconstruction of DMRI using motion estimation/compensation (ME/MC) has been explored under the compressed sensing (CS) scheme. In this paper, by embedding the in...
Poser, Benedikt A Setsompop, Kawin
Published in
NeuroImage
The SNR and CNR benefits of ultra-high field (UHF) have helped push the envelope of achievable spatial resolution in MRI. For applications based on susceptibility contrast where there is a large CNR gain, high quality sub-millimeter resolution imaging is now being routinely performed, particularly in fMRI and phase imaging/QSM. This has enabled the...
Li, Yu Edalati, Masoud Du, Xingfu Wang, Hui Cao, Jie J
Published in
Magnetic resonance in medicine
Correlation imaging is a previously developed high-speed MRI framework that converts parallel imaging reconstruction into the estimate of correlation functions. The presented work aims to demonstrate this framework can provide a speed gain over parallel imaging by estimating k-space variant correlation functions. Because of Fourier encoding with gr...
Tsuji, Yoshinori Saitoh, Satoshi Takahashi, Junji Abe, Chisato Hayashi, Tatsuya Kobayashi, Masahiro
Published in
Radiological Physics and Technology
The controlled aliasing in parallel imaging results in higher acceleration (CAIPIRINHA) technique can decrease scan time. The purpose of this study was to determine whether an arterial phase scan can be performed in 5 s using the CAIPIRINHA short-scan and a reference scanning technique. The generalized autocalibrating partially parallel acquisition...
Bydder, Mark Rapacchi, Stanislas Girard, Olivier Guye, Maxime Ranjeva, Jean-Philippe
Published in
Magnetic resonance imaging
Parallel imaging allows the reconstruction of undersampled data from multiple coils. This provides a means to reject and regenerate corrupt data (e.g. from motion artefact). The purpose of this work is to approach this problem using the SAKE parallel imaging method. Parallel imaging methods typically require calibration by fully sampling the center...
Bouhrara, Mustapha Spencer, Richard G.
Published in
Magnetic resonance in medicine
Purpose The Cramér-Rao lower bound (CRLB) is widely used in the design of magnetic resonance experiments for parameter estimation. Previous work has considered only Gaussian or Rician noise distributions in this calculation. However, the noise distribution for multiple-coil acquisitions, such as in parallel imaging, obeys the noncentral χ-distribut...
Ivanov, Dimo Gardumi, Anna Haast, Roy A M Pfeuffer, Josef Poser, Benedikt A Uludağ, Kâmil
Published in
NeuroImage
Arterial spin labeling (ASL) is the primary non-invasive MRI approach to measure baseline cerebral blood flow (CBF) in healthy subjects and patients. ASL also allows concurrent functional BOLD signal and CBF measurements, but the latter typically suffer from low contrast-to-noise (CNR) ratio. Ultra-high-field imaging significantly boosts BOLD signa...
Hamilton, Jesse Franson, Dominique Seiberlich, Nicole
Published in
Progress in nuclear magnetic resonance spectroscopy
Magnetic Resonance Imaging (MRI) is an essential technology in modern medicine. However, one of its main drawbacks is the long scan time needed to localize the MR signal in space to generate an image. This review article summarizes some basic principles and recent developments in parallel imaging, a class of image reconstruction techniques for shor...
