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Simulation results show that, loading profiles with high acceleration factors can be successfully generated with the accuracy above 95%.
As lung parenchyma SNR is intrinsically low, high acceleration factors of R > 4 as used in cardiac imaging are not achievable in lung imaging.
Recently, dedicated 28-element RF coils with high acceleration factors have been developed for imaging at 7.0 T with very high-resolution (Fig. 2) [12].
In previous work, to accelerate the field test, the standard 'test tailoring approach' has been modified due to the limitations of testing implementation and required high acceleration factors.
This study demonstrates that efficient SMASH imaging at high acceleration factors is feasible using appropriate hardware, and that time domain multiplexing is a convenient strategy to provide the multiple channels required for rapid imaging with large arrays.
Compared with a low-rank or sparse constraint, (1) can significantly increase compressibility of dynamic MRI data and thus enable high acceleration factors.
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Presently, conducting durability tests with a high acceleration factor has become increasingly demanding for the reduction of the time and the cost involved in long period field/durability tests.
This might be achieved with parallel imaging and a very high acceleration factor.
Other sampling patterns may lead to higher acceleration factors.
The latter allows for either the improvement of spatial resolution or the reduction of imaging time with the use of higher acceleration factors (e.g. applying parallel imaging techniques) [76].
Finally, larger voxel size on SSFP MRA and a higher acceleration factor of 3 implemented on CE-MRA, altered the SNR and CNR values in favor of unenhanced SSFP MRA, and a true comparison of SNR and CNR values could not be performed between these datasets, as calculation of the corrected estimate of SNR and CNR is complicated [ 25– 28].
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