- Workshop presentation
- Open Access
A dual-slice k-t approach for highly accelerated flow MRI
© Giese et al; licensee BioMed Central Ltd. 2012
- Published: 1 February 2012
- Root Mean Square Error
- Single Slice
- Phase Encode Direction
- Channel Coil
- Single Inversion
We propose the combination of k-t undersampling with a dual slice excitation approach. The dual slice excitation and reconstruction principle is incorporated into the k-t SENSE reconstruction framework, allowing a doubling of the net acceleration factor when acquiring two slices as compared to acquiring two separate undersampled slices.
Phase contrast MRI has limited practical value in clinical applications due to its inherently long scan times[Kilner,JCMR'07]. Parallel imaging[Pruessmann,MRM'01] and spatio-temporal constrained reconstruction techniques[Tsao,MRM'03] have been shown beneficial[Baltes,MRM'05]. Dual slice approaches have shown advantages as compared to standard SENSE when multiple and sufficiently separated slices are acquired[Breuer,MRM'10]. We present a combination of dual slice excitation with undersampled flow imaging by modifying the k-t SENSE reconstruction framework to include sensitivity information in through-slice direction.
We have presented a reconstruction framework allowing reconstruction of two simultaneously acquired spatio-temporally undersampled phase-contrast slices. Initial results show good agreement between reference, fully sampled, single slice undersampled k-t SENSE and the proposed dual slice accelerated acquisitions. Slight variations between all three images are likely due to the differences in sequentially acquired data. Future work will include the adaptation into other spatio-temporal constrained reconstruction techniques (k-t PCA[Pedersen,MRM'09]) allowing for higher net acceleration factors as well as validation in volunteers and patients.
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