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. Author manuscript; available in PMC: 2019 Jul 1.
Published in final edited form as: Magn Reson Med. 2017 Nov 28;80(1):286–293. doi: 10.1002/mrm.27030

Figure 3.

Figure 3

Influence of the design of the weighting filter W on GROG-GRASP image quality. Reconstruction without an additional filter (n=26, W=1) leads to slow convergence and blurring, which is improved when an additional filter (n>26) is used. While slight blurring remains for n=100, sharp images and rapid convergence are achieved when choosing n according to the Nyquist criterion (n=base resolution∙π/2≈350). Results are similar when using higher n (e.g., n=1000), suggesting that image quality is consistent within a certain range for n.