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Construction of sparse and continuous image acquisition datasets. A, STA (STA60) design. Sixty images were acquired every 12 seconds. B, CA (CA360) design. Three-hundred and sixty images were acquired every 2 seconds. C, CA60 design. The number of volumes in the CA360 data set was matched with the STA60 dataset by selecting every sixth image that corresponded in time to the STA60 acquisitions (CA60; marked with red arrows).
