Sweep Imaging with Fourier Transformation (SWIFT)

Idiyatullin, Djaudat

doi:10.1002/9783527827244.ch5

Cited by 1 publication

(1 citation statement)

References 73 publications

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“…The TE, in this case, filters out the contribution from some fast‐relaxing spins, for example, located on macromolecules. Using short

{T}_2

sensitive sequences such as UTE, 1,2 zero TE (ZTE), 3,4 Sweep Imaging with Fourier Transformation SWIFT, 5 and multi‐band (MB) ‐SWIFT 6,7 as readout allows for the minimization of the

{T}_2

weighting and increase the range of detectable targeted relaxation times 8 . Many quantitative measurements are impossible without knowledge about the actual values of the excitation flip angles or RF field distribution ( B 1 map).…”

Section: Introductionmentioning

confidence: 99%

Alternating Look‐Locker for quantitative T₁, T_1ρ and B₁3D MRI mapping

Wu,

Carchi,

Michaeli

et al. 2023

Magnetic Resonance in Med

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PurposeTo develop a new MRI method, entitled alternating Look‐Locker (aLL), for quantitative , , and 3D mapping.MethodsA Look‐Locker scheme that alternates magnetization from +Z and −Z axes of the laboratory frame is utilized in combination with a 3D Multi‐Band Sweep Imaging with Fourier Transformation (MB‐SWIFT) readout. The analytical solution describing the spin evolution during aLL, as well as the correction required for segmented acquisition were derived. The simultaneous and mapping are demonstrated on an agar/saline phantom and on an in‐vivo rat head. relaxation was achieved by cyclically applying magnetization preparation (MP) modules consisting of two adiabatic pulses. values in the rat brain in‐vivo and in a gadobenate dimeglumine (Gd‐DTPA) phantom were compared to those obtained with a previously introduced steady‐state (SS) method.ResultsThe accuracy and precision of the analytical solution was tested by Bloch simulations. With the application of MP modules, the aLL method provides simultaneous and maps. Conversely, without it, the method can be used for simultaneous and mapping. values were similar with both aLL and SS techniques. However, the aLL method resulted in more robust quantitative mapping compared to the SS method. Unlike the SS method, the aLL method does not require additional scans for generating maps.ConclusionThe proposed method offers a new flexible tool for quantitative mapping of , , and . The aLL method can also be used with readout schemes different from MB‐SWIFT.

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“…The TE, in this case, filters out the contribution from some fast‐relaxing spins, for example, located on macromolecules. Using short

{T}_2

sensitive sequences such as UTE, 1,2 zero TE (ZTE), 3,4 Sweep Imaging with Fourier Transformation SWIFT, 5 and multi‐band (MB) ‐SWIFT 6,7 as readout allows for the minimization of the

{T}_2

Section: Introductionmentioning

confidence: 99%

Alternating Look‐Locker for quantitative T₁, T_1ρ and B₁3D MRI mapping

Wu,

Carchi,

Michaeli

et al. 2023

Magnetic Resonance in Med

Self Cite

View full text Add to dashboard Cite

show abstract

Sweep Imaging with Fourier Transformation (SWIFT)

Cited by 1 publication

References 73 publications

Alternating Look‐Locker for quantitative T₁, T_1ρ and B₁3D MRI mapping

Alternating Look‐Locker for quantitative T₁, T_1ρ and B₁3D MRI mapping

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Sweep Imaging with Fourier Transformation (SWIFT)

Cited by 1 publication

References 73 publications

Alternating Look‐Locker for quantitative T1, T1ρ and B13D MRI mapping

Alternating Look‐Locker for quantitative T1, T1ρ and B13D MRI mapping

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Alternating Look‐Locker for quantitative T₁, T_1ρ and B₁3D MRI mapping

Alternating Look‐Locker for quantitative T₁, T_1ρ and B₁3D MRI mapping