Clinically feasible NODDI characterization of glioma using multiband EPI at 7 T
نویسندگان
چکیده
منابع مشابه
Clinically feasible NODDI characterization of glioma using multiband EPI at 7 T
Recent technological progress in the multiband echo planer imaging (MB EPI) technique enables accelerated MR diffusion weighted imaging (DWI) and allows whole brain, multi-b-value diffusion imaging to be acquired within a clinically feasible time. However, its applications at 7 T have been limited due to B1 field inhomogeneity and increased susceptibility artifact. It is an ongoing debate wheth...
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A whole brain, multiband spin-echo (SE) echo planar imaging (EPI) sequence employing a high spatial (1.5 mm isotropic) and temporal (TR of 2 s) resolution was implemented at 7 T. Its overall performance (tSNR, sensitivity and CNR) was assessed and compared to a geometrically matched gradient-echo (GE) EPI multiband sequence (TR of 1.4 s) using a color-word Stroop task. PINS RF pulses were used ...
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Introduction: Simultaneous Multi-Slice (SMS) imaging [1] using MultiBand (MB) RF pulses has shown great success in functional and diffusion weighted (DW) MRI studies of the brain [2-5]. Recently, this technique has been combined with parallel transmission (pTx) and it has been demonstrated that pTx MB pulse design [6] can significantly improve transmit B1 (B1+) homogeneity at 7T and/or reduce R...
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Introduction fMRI commonly employs the echo planar imaging (EPI) sequence because of its favourable sensitivity, and its very high sampling efficiency which allows ‘single-shot’ imaging of a brain slice within typically ~70 ms. This is achieved by traversing k-space under an oscillating readout gradient, and so every other k-space line needs to be time-reversed (‘flipped’) before Fourier recons...
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Functional MRI studies on humans with BOLD contrast are increasingly performed at high static magnetic field in order to exploit the increased sensitivity. The downside of high-field fMRI using the gradient-echo echo-planar imaging (GE-EPI) method is that images are typically very strongly affected by image distortion and signal loss. It has been demonstrated at 1.5 T and 3 T that image artifac...
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ژورنال
عنوان ژورنال: NeuroImage: Clinical
سال: 2015
ISSN: 2213-1582
DOI: 10.1016/j.nicl.2015.08.017