Articles with "state free" as a keyword



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Merging images with different central frequencies reduces banding artifacts in balanced steady‐state free precession magnetic resonance cisternography

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Published in 2018 at "Journal of Applied Clinical Medical Physics"

DOI: 10.1002/acm2.12468

Abstract: Abstract Purpose The aim of this study was to evaluate the utility of merged balanced steady‐state free precession (bSSFP) magnetic resonance cisternography images. Materials and Methods Twenty ears of 10 healthy volunteers (six men, four… read more here.

Keywords: images different; different central; balanced steady; central frequencies ... See more keywords
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Multiple breath washout of hyperpolarized 129Xe and 3He in human lungs with three‐dimensional balanced steady‐state free‐precession imaging

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Published in 2017 at "Magnetic Resonance in Medicine"

DOI: 10.1002/mrm.26319

Abstract: To compare quantitative fractional ventilation measurements from multiple breath washout imaging (MBW‐I) using hyperpolarized 3He with both spoiled gradient echo (SPGR) and balanced steady‐state free precession (bSSFP) three‐dimensional (3D) pulse sequences and to evaluate the… read more here.

Keywords: free precession; balanced steady; multiple breath; breath washout ... See more keywords
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Spectrally selective three‐dimensional dynamic balanced steady‐state free precession for hyperpolarized C‐13 metabolic imaging with spectrally selective radiofrequency pulses

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Published in 2017 at "Magnetic Resonance in Medicine"

DOI: 10.1002/mrm.26480

Abstract: Balanced steady‐state free precession (bSSFP) sequences can provide superior signal‐to‐noise ratio efficiency for hyperpolarized (HP) carbon‐13 (13C) magnetic resonance imaging by efficiently utilizing the nonrecoverable magnetization, but managing their spectral response is challenging in the… read more here.

Keywords: free precession; balanced steady; steady state; state free ... See more keywords
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T2‐prepared balanced steady‐state free precession (bSSFP) for quantifying whole‐blood oxygen saturation at 1.5T

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Published in 2018 at "Magnetic Resonance in Medicine"

DOI: 10.1002/mrm.26835

Abstract: To establish a calibration equation to convert human blood T2 to the full range of oxygen saturation levels (HbO2) and physiologic hematocrit (Hct) values using a T2‐prepared balanced steady‐state free precession sequence (T2‐SSFP) at 1.5T. read more here.

Keywords: prepared balanced; free precession; oxygen saturation; balanced steady ... See more keywords
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Multi‐parametric artificial neural network fitting of phase‐cycled balanced steady‐state free precession data

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Published in 2020 at "Magnetic Resonance in Medicine"

DOI: 10.1002/mrm.28325

Abstract: Standard relaxation time quantification using phase‐cycled balanced steady‐state free precession (bSSFP), eg, motion‐insensitive rapid configuration relaxometry (MIRACLE), is subject to a considerable underestimation of tissue T1 and T2 due to asymmetric intra‐voxel frequency distributions. In… read more here.

Keywords: phase cycled; free precession; cycled balanced; balanced steady ... See more keywords
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Slice‐selective extended phase graphs in gradient‐crushed, transient‐state free precession sequences: An application to MR fingerprinting

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Published in 2020 at "Magnetic Resonance in Medicine"

DOI: 10.1002/mrm.28381

Abstract: Slice‐selective, gradient‐crushed, transient‐state sequences such as those used in MR fingerprinting (MRF) relaxometry are sensitive to slice profile effects. Whereas balanced steady‐state free precession MRF profile effects have been studied, less attention has been given… read more here.

Keywords: gradient crushed; slice selective; crushed transient; state free ... See more keywords
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Motion resilience of the balanced steady‐state free precession geometric solution

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Published in 2022 at "Magnetic Resonance in Medicine"

DOI: 10.1002/mrm.29438

Abstract: Many MRI sequences are sensitive to motion and its associated artifacts. The linearized geometric solution (LGS), a balanced steady‐state free precession (bSSFP) off‐resonance signal demodulation technique, is evaluated with respect to motion artifact resilience. read more here.

Keywords: balanced steady; free precession; motion; geometric solution ... See more keywords
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Extended RF shimming: Sequence‐level parallel transmission optimization applied to steady‐state free precession MRI of the heart

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Published in 2017 at "Nmr in Biomedicine"

DOI: 10.1002/nbm.3701

Abstract: Cardiac magnetic resonance imaging (MRI) at high field presents challenges because of the high specific absorption rate and significant transmit field (B1+) inhomogeneities. Parallel transmission MRI offers the ability to correct for both issues at… read more here.

Keywords: parallel transmission; free precession; sequence level; steady state ... See more keywords
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Comparison of Sensitivity and Low-Frequency Noise Contributions in Giant-Magnetoresistive and Tunneling-Magnetoresistive Spin-Valve Sensors with a Vortex-State Free Layer

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Published in 2018 at "Physical Review Applied"

DOI: 10.1103/physrevapplied.10.054056

Abstract: Magnetoresistive spin valve sensors based on the giant- (GMR) and tunnelling- (TMR) magnetoresisitve effect with a flux-closed vortex state free layer design are compared by means of sensitivity and low frequency noise. The vortex state… read more here.

Keywords: free layer; vortex state; noise; state free ... See more keywords
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An echo‐planar imaging sequence is superior to a steady‐state free precession sequence for visual as well as quantitative assessment of cardiac magnetic resonance stress perfusion

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Published in 2017 at "Clinical Physiology and Functional Imaging"

DOI: 10.1111/cpf.12267

Abstract: To assess myocardial perfusion, steady‐state free precession cardiac magnetic resonance (SSFP, CMR) was compared with gradient‐echo–echo‐planar imaging (GRE‐EPI) using myocardial perfusion scintigraphy (MPS) as reference. read more here.

Keywords: perfusion; free precession; steady state; state free ... See more keywords