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. Author manuscript; available in PMC: 2016 Aug 1.
Published in final edited form as: Magn Reson Med. 2014 Aug 27;74(2):452–461. doi: 10.1002/mrm.25436

Fig.5.

Fig.5

MRI of an orange from a semi-rigid loopless antenna p as in Fig. 1(b) without (a), and with (b) the r-1 intensity filter (zoomed-in) applied. These images were acquired in the absence of motion and reconstructed from all 200 projections. (c) Four-fold radially under-sampled CS reconstruction of the same image data shown in part (b) (SSIM vs. 5b =0.52). (d) Conventional NUFFT reconstruction of the image data in part (c), shows streaking (arrow; SSIM vs. 5b = 0.44). (e) MRI of the same orange as in part (b), but shaken ± 3mm. The motion artefacts are debilitating (SSIM vs. 5b =0.28). (f) Motion-correction applied to image in part (e) using the COM algorithm (15) (SSIM vs. 5b =0.35). (g) Motion correction with the projection-shifting method shows reduced blurring vs parts (e) and (f) (arrows; SSIM vs. 5b =0.56). (h) Combined four-fold acceleration and motion correction with projection shifting, as applied to the data in part (e)(SSIM vs. 5b = 0.5).