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. Author manuscript; available in PMC: 2020 Jun 1.
Published in final edited form as: Magn Reson Med. 2019 Feb 14;81(6):3662–3674. doi: 10.1002/mrm.27681

Table 1.

All frames from each method are retrospectively registered and analyzed for structural similarity index (SSIM). Mean SSIM reflects the average spatial agreement with a reference frame, and is lowest in FB acquisitions, which implies retrospective image registration alone cannot achieve similar image quality to other methods.

FB FB-TF PROCO Nav-Gate Nav-Gate-TF
Mean (mm) 0.63 0.69 0.70 0.70 0.73
Std (mm) 0.12 0.13 0.12 0.11 0.11