Journal ArticleDOI
3-D FLASH imaging using a single surface coil and a new adiabatic pulse, BIR-4.
R. Scott Staewen,Anton J. Johnson,Brian D. Ross,Todd B. Parrish,Hellmut Merkle,Michael Garwood +5 more
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TLDR
Computer calculations and phantom, rat, and human surface coil imaging experiments demonstrate the utility of this adiabatic pulse for T1-weighted imaging with a transmitter coil which generates a highly inhomogeneous B1 field profile.Abstract:
A new adiabatic pulse, which can induce uniform and arbitrary flip angles despite the presence of transmitter coil magnetic field (B1) inhomogeneities, is employed for 3-D fast imaging using a single surface coil for pulse transmission and signal detection. Computer calculations and phantom, rat, and human surface coil imaging experiments demonstrate the utility of this adiabatic pulse for T1-weighted imaging with a transmitter coil which generates a highly inhomogeneous B1 field profile.read more
Citations
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Journal ArticleDOI
Saturated double-angle method for rapid B1+ mapping.
TL;DR: A new method is presented for highly rapid B1+ magnitude mapping that combines the double angle method with a B1‐insensitive magnetization‐reset sequence such that the choice of repetition time (TR) is independent of T1 and with a multislice segmented (spiral) acquisition to achieve volumetric coverage with adequate spatial resolution in a few seconds.
Journal ArticleDOI
Symmetric pulses to induce arbitrary flip angles with compensation for rf inhomogeneity and resonance offsets
Michael Garwood,Yong Ke +1 more
TL;DR: In this paper, a symmetric composite and adiabatic pulse, BIR-4, is derived which can induce a constant rotation of any desired flip angle despite RF inhomogeneity and resonance offset.
Journal ArticleDOI
Magnetic resonance multitasking for motion-resolved quantitative cardiovascular imaging
Anthony G. Christodoulou,Jaime L. Shaw,Jaime L. Shaw,Christopher Nguyen,Christopher Nguyen,Qi Yang,Qi Yang,Yibin Xie,Nan Wang,Nan Wang,Debiao Li,Debiao Li +11 more
TL;DR: It is shown that physiological motions and other dynamic processes can be conceptualized as multiple time dimensions that can be resolved via low-rank tensor imaging, allowing for motion-resolved quantitative imaging with up to four time dimensions.
Journal ArticleDOI
Fast-kz three-dimensional tailored radiofrequency pulse for reduced B1 inhomogeneity.
TL;DR: A small‐flip‐angle, three‐dimensional tailored RF pulse that excites thin slices with an adjustable quadratic in‐plane spatial variation is presented that helps to compensate for the loss in image uniformity using a volume coil at 3 T due to the wavelike properties of the RF field.
Journal ArticleDOI
Optimization of 3-D MP-RAGE sequences for structural brain imaging.
TL;DR: An optimized MR sequence for structural three-dimensional brain scans is presented, giving good T1 contrast and excellent white matter/gray matter segmentation and the contrast-to-noise-ratio is about 100% higher than for sequences based on linear phase encoding.
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