Whole‐brain vessel wall MRI: A parameter tune‐up solution to improve the scan efficiency of three‐dimensional variable flip‐angle turbo spin‐echo
Sign Up to like & getrecommendations! Published in 2017 at "Journal of Magnetic Resonance Imaging"
DOI: 10.1002/jmri.25611
Abstract: To propose and evaluate a parameter tune‐up solution to expedite a three‐dimensional (3D) variable‐flip‐angle turbo spin‐echo (TSE) sequence for whole‐brain intracranial vessel wall (IVW) imaging. read more here.
Keywords: parameter tune; three dimensional; flip angle; variable flip ... See more keywords
Flip angle optimization for balanced SSFP: Cardiac cine imaging following the application of standard extracellular contrast agent (gadobutrol)
Sign Up to like & getrecommendations! Published in 2018 at "Journal of Magnetic Resonance Imaging"
DOI: 10.1002/jmri.25728
Abstract: To investigate the effect of the flip angle (FA) on the blood‐myocardium contrast and to define the FA leading to highest image quality in contrast‐enhanced balanced steady‐state free precession (bSSFP) images. bSSFP images provide excellent… read more here.
Keywords: flip angle; contrast; extracellular contrast; angle optimization ... See more keywords
Technical Note: The effect of 2D excitation profile on T1 measurement accuracy using the variable flip angle method with an average flip angle assumption
Sign Up to like & getrecommendations! Published in 2017 at "Medical Physics"
DOI: 10.1002/mp.12513
Abstract: Purpose: To study the accuracy and precision of T1 estimates using the Variable Flip Angle (VFA) method in 2D and 3D acquisitions. Methods: Excitation profiles were simulated using numerical implementation of the Bloch equations for… read more here.
Keywords: flip angle; angle; method; accuracy ... See more keywords
Transverse relaxation and flip angle mapping: Evaluation of simultaneous and independent methods using multiple spin echoes
Sign Up to like & getrecommendations! Published in 2017 at "Magnetic Resonance in Medicine"
DOI: 10.1002/mrm.26285
Abstract: To evaluate transverse relaxation (T2) and flip angle maps derived from signal pathway modeling of multiple spin echoes using simultaneous or independent T2 and flip angle fitting. read more here.
Keywords: flip angle; flip; transverse relaxation; multiple spin ... See more keywords
Snapshot whole‐brain T1 relaxometry using steady‐state prepared spiral multislice variable flip angle imaging
Sign Up to like & getrecommendations! Published in 2018 at "Magnetic Resonance in Medicine"
DOI: 10.1002/mrm.26746
Abstract: Variable flip angle (VFA) imaging is widely used for whole‐brain T1 quantification. Because of the requirement to acquire at least two sets of MR images at different flip angles, VFA relaxometry is relatively slow. Here,… read more here.
Keywords: variable flip; flip angle; flip; whole brain ... See more keywords
T1 mapping with the variable flip angle technique: A simple correction for insufficient spoiling of transverse magnetization
Sign Up to like & getrecommendations! Published in 2018 at "Magnetic Resonance in Medicine"
DOI: 10.1002/mrm.26979
Abstract: The variable flip angle method derives T1 maps from radiofrequency‐spoiled gradient‐echo data sets, acquired with different flip angles α. Because the method assumes validity of the Ernst equation, insufficient spoiling of transverse magnetization yields errors… read more here.
Keywords: flip angle; variable flip; spoiling transverse; insufficient spoiling ... See more keywords
Optimizing SNR for multi‐metabolite hyperpolarized carbon‐13 MRI using a hybrid flip‐angle scheme
Sign Up to like & getrecommendations! Published in 2020 at "Magnetic Resonance in Medicine"
DOI: 10.1002/mrm.28194
Abstract: To improve the SNR of hyperpolarized carbon‐13 MRI of [1‐13C]pyruvate using a multispectral variable flip angle (msVFA) scheme in which the spectral profile and flip angle vary dynamically with time. read more here.
Keywords: flip angle; flip; carbon mri; hyperpolarized carbon ... See more keywords
Dual‐excitation flip‐angle simultaneous cine and T1 mapping using spiral acquisition with respiratory and cardiac self‐gating
Sign Up to like & getrecommendations! Published in 2021 at "Magnetic Resonance in Medicine"
DOI: 10.1002/mrm.28675
Abstract: To develop a free‐breathing cardiac self‐gated technique that provides cine images and B1+ slice profile–corrected T1 maps from a single acquisition. read more here.
Keywords: flip angle; excitation flip; dual excitation; self ... See more keywords
Mitigating the impact of flip angle and orientation dependence in single compartment R2* estimates via 2‐pool modeling
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DOI: 10.1002/mrm.29428
Abstract: The effective transverse relaxation rate ( R2*$$ {\mathrm{R}}_2^{\ast } $$ ) is influenced by biological features that make it a useful means of probing brain microstructure. However, confounding factors such as dependence on flip angle… read more here.
Keywords: orientation; dependence; flip angle; single compartment ... See more keywords
Regularized SUPER-CAIPIRINHA: Accelerating 3D variable flip-angle T1 mapping with accurate and efficient reconstruction.
Sign Up to like & getrecommendations! Published in 2023 at "Magnetic resonance in medicine"
DOI: 10.1002/mrm.29714
Abstract: PURPOSE To propose an acceleration method for 3D variable flip-angle (VFA) T1 mapping based on a technique called shift undersampling improves parametric mapping efficiency and resolution (SUPER). METHODS The proposed method incorporates strategies of SUPER,… read more here.
Keywords: rsuper caipirinha; caipirinha; flip angle; super caipirinha ... See more keywords
SAturation‐recovery and Variable‐flip‐Angle–based three‐dimensional free‐breathing cardiovascular magnetic resonance T1 mapping at 3 T
Sign Up to like & getrecommendations! Published in 2022 at "NMR in Biomedicine"
DOI: 10.1002/nbm.4755
Abstract: The purpose of the current study was to develop and validate a three‐dimensional (3D) free‐breathing cardiac T1‐mapping sequence using SAturation‐recovery and Variable‐flip‐Angle (SAVA). SAVA sequentially acquires multiple electrocardiogram‐triggered volumes using a multishot spoiled gradient‐echo sequence.… read more here.
Keywords: saturation recovery; flip angle; recovery;