Table 1 Quantitative evaluation by using NMSE measure is compared among reconstructed images of the conventional GRAPPA, Tikhonov regularization, IRLS, and the proposed AV-GRAPPA, which are denoted as “G,” “T,” “I,” and “V” in the table, respectively. “R” represents the outer reduction factor, and the numbers of ACS lines are presented in the first column of the table. In addition, all reconstructions are implemented with the same sampling pattern. The proposed AV-GRAPPA generally has better performance than other methods
From: Adaptive Volterra Filter for Parallel MRI Reconstruction
ACS | R = 4 | R = 5 | R = 6 | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
G(%) | T(%) | I(%) | V(%) | G(%) | T(%) | I(%) | V(%) | G(%) | T(%) | I(%) | V(%) | |
Phantom imaging | ||||||||||||
64 | 0.0637 | 0.0643 | 0.0637 | 0.0331 | 0.2204 | 0.1781 | 0.1756 | 0.0389 | 1.0312 | 0.2496 | 0.0755 | 0.0524 |
Four-channel brain imaging | ||||||||||||
48 | 0.7283 | 0.1897 | 0.1195 | 0.0815 | 1.1265 | 0.3526 | 0.3878 | 0.2157 | 2.1861 | 0.5458 | 0.5207 | 0.4797 |
Eight-channel brain imaging | ||||||||||||
38 | 0.2063 | 0.2056 | 0.1379 | 0.1082 | 1.4566 | 0.7735 | 0.6847 | 0.2104 | 1.9476 | 0.7356 | 0.6448 | 2.2699 |