Exact(1)
This issue can be addressed using parallel imaging and all the tricks reducing echo time (bandwidth increase, use of monopolar gradients, etc).
Similar(59)
By reducing the echo time and improving the MRI system, one can reduce the dipolar interaction, consequently reducing orientational influences to T2 and T1ρ.
The use of an SE sequence, reducing the echo time and increasing the acquisition matrix, may be helpful to minimise these susceptibility artefacts.
The only way to resolve multi-component relaxation in any imaging experiment is to reduce the min echo time and to increase the relaxation resolution.
Drop-out can also be reduced by decreasing the echo time (TE), but decreasing the echo time (TE) decreases sensitivity to the BOLD effect [23] and thus negatively affects the CNR.
At longer echo time the lipid signals will be reduced due to short relaxation time [ 26], and in seven of the fourteen spectra obtained at TE 144, a small peak of NAA could be observed.
At 3 T, parallel imaging can help reduce SAR of a SSFSE sequence, which can also allow a shorter echo time [18].
Two 64-direction DTI sequences were acquired with a single shot, spin-echo echo planar imaging sequence (55 contiguous axial 2.5 mm slices with 240 mm field of view and 96×9696 matrix, yielding 2.5 mm isotropic voxels; repetition time: 6,800 ms; echo time: 91 ms; b value: 1,000 s/mm), augmented with parallel imaging acceleration to reduce susceptibility artifacts.
Ultrashort echo time.
Zero echo time.
The sequence parameters for T1-weighted (T1 W) imaging was spin-echo repetition time 500 ms, echo time 17.9 ms; T2-weighted (T2 W) imaging was fast spin-echo repetition time 4000 ms; echo time 108 ms; echo train length 16; T2*-weighted (T2*W) imaging was gradient-echo repetition time 620 ms, echo time 15.7 ms; flip angle 35°.
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