scholarly journals Comparison of high spatial resolution respiratory triggered inversion recovery-prepared spoiled gradient echo sequence with standard breathhold T1 sequence MRI of the liver using gadoxetic acid

2013 ◽  
Vol 37 (3) ◽  
pp. 700-706 ◽  
Author(s):  
Phillip V.P. Tran ◽  
Kartik S. Jhaveri
Keyword(s):  
Spatial Resolution ◽  
High Spatial Resolution ◽  
Inversion Recovery ◽  
Gadoxetic Acid ◽  
Gradient Echo ◽  
Spoiled Gradient Echo

High spatial resolution BOLD fMRI using simultaneous multislice excitation with echo-shifting gradient echo at 7 Tesla

2020 ◽  
Vol 66 ◽  
pp. 86-92 ◽  
Author(s):  
Shi Su ◽  
Na Lu ◽  
Lin Jia ◽  
Xiaojing Long ◽  
Chunxiang Jiang ◽  
...  
Keyword(s):  
Spatial Resolution ◽  
High Spatial Resolution ◽  
Gradient Echo ◽  
Bold Fmri ◽  
Simultaneous Multislice

Human Gray Matter: Feasibility of Single-Slab 3D Double Inversion-Recovery High-Spatial-Resolution MR Imaging

Radiology ◽  
2006 ◽  
Vol 241 (3) ◽  
pp. 873-879 ◽  
Author(s):  
Petra J. W. Pouwels ◽  
Joost P. A. Kuijer ◽  
John P. Mugler ◽  
Charles R. G. Guttmann ◽  
Frederik Barkhof
Keyword(s):  
Mr Imaging ◽  
Spatial Resolution ◽  
Gray Matter ◽  
High Spatial Resolution ◽  
Inversion Recovery ◽  
Double Inversion Recovery

Myocardial T1 mapping for patients with implanted cardiac devices using wideband inversion recovery spoiled gradient echo readout

2016 ◽  
Vol 77 (4) ◽  
pp. 1495-1504 ◽  
Author(s):  
Jiaxin Shao ◽  
Shams Rashid ◽  
Pierangelo Renella ◽  
Kim-Lien Nguyen ◽  
Peng Hu
Keyword(s):  
T1 Mapping ◽  
Inversion Recovery ◽  
Gradient Echo ◽  
Cardiac Devices ◽  
Myocardial T1 ◽  
Spoiled Gradient Echo

scholarly journals Single-shot Multi-slice T1 Mapping at High Spatial Resolution – Inversion-Recovery FLASH with Radial Undersampling and Iterative Reconstruction

2015 ◽  
Vol 9 (1) ◽  
pp. 1-8 ◽  
Author(s):  
Xiaoqing Wang ◽  
Volkert Roeloffs ◽  
K. Dietmar Merboldt ◽  
Dirk Voit ◽  
Sebastian Schätz ◽  
...  
Keyword(s):  
Spatial Resolution ◽  
T1 Mapping ◽  
High Spatial Resolution ◽  
Lattice Relaxation ◽  
Inversion Recovery ◽  
Spin Lattice Relaxation ◽  
Single Shot ◽  
Nonlinear Inversion ◽  
Spin Lattice ◽  
Single Slice

Purpose: To develop a method for T1 mapping at high spatial resolution and for multiple slices. Methods: The proposed method emerges as a single-shot inversion-recovery experiment which covers the entire spin-lattice relaxation process by serial acquisitions of highly undersampled radial FLASH images, either in single-slice or multi-slice mode. Serial image reconstructions are performed in time-reversed order and first involve regularized nonlinear inversion (NLINV) to estimate optimum coil sensitivity profiles. Subsequently, the coil profiles are fixed for the calculation of differently T1-weighted frames and the resulting linear inverse problem is solved by a conjugate gradient (CG) technique. T1 values are obtained by pixelwise fitting with a Deichmann correction modified for multi-slice applications. Results: T1 accuracy was validated for a reference phantom. For human brain, T1 maps were obtained at 0.5 mm resolution for single-slice acquisitions and at 0.75 mm resolution for up to 5 simultaneous slices (5 mm thickness). Corresponding T1 maps of the liver were acquired at 1 mm and 1.5 mm resolution, respectively. All T1 values were in agreement with literature data. Conclusion: Inversion-recovery sequences with highly undersampled radial FLASH images and NLINV/CG reconstruction allow for fast, robust and accurate T1 mapping at high spatial resolution and for multiple slices.

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